A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become
A simple spring-mass vibrating system has a natural frequency of fn. If the spring stiffness is halved and the mass is doubled, then the natural frequency will become
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is
In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted force and the disturbing force is
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the center of drum, and n = Number of blocks)
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the center of drum, and n = Number of blocks)
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
The length of a simple pendulum which gives the same frequency as the compound pendulum, is
The length of a simple pendulum which gives the same frequency as the compound pendulum, is
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is
Which of the following governor is used to drive a gramophone?
Which of the following governor is used to drive a gramophone?
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
Tangential acceleration direction is
Tangential acceleration direction is
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.
Inertia force acts
Inertia force acts
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
Torsional vibrations are said to occur when the particles of a body moves
Torsional vibrations are said to occur when the particles of a body moves
In an ideal machine, the output as compared to input is
In an ideal machine, the output as compared to input is
Which one of the following is an exact straight line mechanism using lower pairs?
Which one of the following is an exact straight line mechanism using lower pairs?
The partial balancing means
The partial balancing means
A spring controlled governor is said to be stable if the controlling force line when produced intersects the Y-axis
A spring controlled governor is said to be stable if the controlling force line when produced intersects the Y-axis
The mechanism consisting of three turning pairs and one sliding pair, is called a
The mechanism consisting of three turning pairs and one sliding pair, is called a
For the brake to be self locking, the force P at C shown in the below figure, should
For the brake to be self locking, the force P at C shown in the below figure, should
When the axes of the first and last wheels are coaxial, then the train is known as
When the axes of the first and last wheels are coaxial, then the train is known as
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)
Relationship between the number of links (L) and number of pairs (P) is
Relationship between the number of links (L) and number of pairs (P) is
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)
The velocity of the belt for maximum power is (where m = Mass of the belt in kg per meter length)
The rotating shafts tend to vibrate violently at whirling speeds because
The rotating shafts tend to vibrate violently at whirling speeds because
Which of the following has sliding motion?
Which of the following has sliding motion?
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)
For fluctuating loads, well suited bearing is
For fluctuating loads, well suited bearing is
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is
In a mechanism, the fixed instantaneous centers are those centers which
In a mechanism, the fixed instantaneous centers are those centers which
Klein's construction can be used to determine acceleration of various parts when the crank is at
Klein's construction can be used to determine acceleration of various parts when the crank is at
In S.H.M., acceleration is proportional to
In S.H.M., acceleration is proportional to
A rotor supported at A and B carries two masses as shown in the below figure. The rotor is
A rotor supported at A and B carries two masses as shown in the below figure. The rotor is
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
Which of the following would constitute a link?
Which of the following would constitute a link?
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by
The Hooke's joint consists of:
The Hooke's joint consists of:
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?
A thin circular disc is rolling with a uniform linear speed, along a straight path on a plane surface. Which of the following statement is correct in this regard?
The partial balancing of reciprocating parts in locomotives produces
The partial balancing of reciprocating parts in locomotives produces
The frequency of oscillation of a compound pendulum is
The frequency of oscillation of a compound pendulum is
Creep in belt drive is due to
Creep in belt drive is due to
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin)
A disc is a spinning with an angular velocity ω rad/s about the axis of spin. The couple applied to the disc causing precession will be (where I = Mass moment of inertia of the disc, and ωP = Angular velocity of precession of the axis of spin)
The two elements of a pair are said to form a higher pair, when they
The two elements of a pair are said to form a higher pair, when they
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
In order to balance the reciprocating masses,
In order to balance the reciprocating masses,
Kinematic pairs are those which have two elements that
Kinematic pairs are those which have two elements that
The contact ratio is given by
The contact ratio is given by
Shaft revolving in a bearing is the following type of pair
Shaft revolving in a bearing is the following type of pair
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the
The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is
The transmissibility, for all values of damping factor, will be less than unity, if ω/ωn is
In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater tension T₁ acts at A and smaller tension T₂ at B. Length OA is greater than length OB. In order to apply the brake, the force P at C should
In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater tension T₁ acts at A and smaller tension T₂ at B. Length OA is greater than length OB. In order to apply the brake, the force P at C should
In a screw jack, the effort required to lower the load W is given by
In a screw jack, the effort required to lower the load W is given by
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called
The behaviour of gases can be fully determined by
The behaviour of gases can be fully determined by
The factional torque for square thread at the mean radius r while raising load W is given by
The factional torque for square thread at the mean radius r while raising load W is given by
The following is the inversion of slider crank chain mechanism
The following is the inversion of slider crank chain mechanism
The ratio of maximum fluctuation of energy to the work-done per cycle is called
The ratio of maximum fluctuation of energy to the work-done per cycle is called
The ratio of the driving tensions for V-belts is __________ times that of flat belts.
(Where β = Semi-angle of the groove)
The ratio of the driving tensions for V-belts is __________ times that of flat belts.
(Where β = Semi-angle of the groove)
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.
The pitching of a ship produces forces on the bearings which act __________ to the motion of the ship.
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.
When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively)
The frictional torque transmitted in a flat collar bearing, considering uniform wear, is (where r₁ and r₂ = External and internal radii of collar respectively)
Throw of a cam is the maximum distance of the follower from
Throw of a cam is the maximum distance of the follower from
The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively)
The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r₁ and r₂ = External and internal radii of collar respectively)
The total number of instantaneous centers for a mechanism consisting of n links are
The total number of instantaneous centers for a mechanism consisting of n links are
The stress induced in a body will be shear stress, when it is subjected to
The stress induced in a body will be shear stress, when it is subjected to
Typewriter constitutes
Typewriter constitutes
The maximum or minimum value of the swaying couple is
The maximum or minimum value of the swaying couple is
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)
An exact straight line motion mechanism is a
An exact straight line motion mechanism is a
The swaying couple is due to the
The swaying couple is due to the
The sense of Coriolis component is such that it
The sense of Coriolis component is such that it
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than
A Porter governor is a
A Porter governor is a
In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction.
In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction.
A watt's governor can work satisfactorily at speeds from
A watt's governor can work satisfactorily at speeds from
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links
When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)
The power from the engine to the rear axle of an automobile is transmitted by means of
The power from the engine to the rear axle of an automobile is transmitted by means of
The tendency of a body to resist change from rest or motion is known as
The tendency of a body to resist change from rest or motion is known as
Pitch point on a cam is
Pitch point on a cam is
In an open pair, the two elements of a pair
In an open pair, the two elements of a pair
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)
The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)
Which of the following is a pendulum type governor?
Which of the following is a pendulum type governor?
Which one of the following can completely balance several masses revolving in different planes on a shaft?
Which one of the following can completely balance several masses revolving in different planes on a shaft?
In elliptical trammels
In elliptical trammels
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be
For an isochronous Hartnell governor (where r₁ and r₂ = Maximum and minimum radius of rotation of balls respectively, S₁ and S₂ = Maximum and minimum force exerted on the sleeve respectively, and M = Mass on the sleeve)
For an isochronous Hartnell governor (where r₁ and r₂ = Maximum and minimum radius of rotation of balls respectively, S₁ and S₂ = Maximum and minimum force exerted on the sleeve respectively, and M = Mass on the sleeve)
When a slider moves on a fixed link having curved surface, their instantaneous centre lies
When a slider moves on a fixed link having curved surface, their instantaneous centre lies
The arrangement is called bevel gearing, when two __________ are connected by gears.
The arrangement is called bevel gearing, when two __________ are connected by gears.
The amplitude of vibration is always __________ the radius of the circle.
The amplitude of vibration is always __________ the radius of the circle.
The Bifilar suspension method is used to determine
The Bifilar suspension method is used to determine
The ratio of the number of teeth to the pitch circle diameter in millimeters, is called
The ratio of the number of teeth to the pitch circle diameter in millimeters, is called
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
Which of the following mechanism is an approximate straight line motion mechanism?
Which of the following mechanism is an approximate straight line motion mechanism?
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)
In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be (where ω = Angular speed of the system, ωn = Natural frequency of vibration of the system)
In a multiple V-belt drive, if one of the belts is broken, then we should replace
In a multiple V-belt drive, if one of the belts is broken, then we should replace
The advantage of the piston valve over the slide valve is that in the former case
The advantage of the piston valve over the slide valve is that in the former case
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by
In the below figure, PC is the connecting rod and OC is the crank making an angle θ with the line of stroke PO and rotates with uniform angular velocity at ω rad/s. The Klien's acceleration diagram for determining the acceleration of the piston P is shown by quadrilateral CQNO. The acceleration of the piston P with respect to the crank-pin C is given by
Length of arc of contact is given by
Length of arc of contact is given by
The frictional torque transmitted by a cone clutch is same as that of
The frictional torque transmitted by a cone clutch is same as that of
Which of the following is a spring controlled governor?
Which of the following is a spring controlled governor?
The number of centers in a crank driven slider crank mechanism is
The number of centers in a crank driven slider crank mechanism is
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?
The ratio of maximum fluctuation of speed to the mean speed is called
The ratio of maximum fluctuation of speed to the mean speed is called
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.
The minimum force required to slide a body of weight W on a rough horizontal plane is
The minimum force required to slide a body of weight W on a rough horizontal plane is
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)
The Whitworth quick return motion mechanism is formed in a slider crank chain when the
The Whitworth quick return motion mechanism is formed in a slider crank chain when the
The minimum periodic time of a compound pendulum is
The minimum periodic time of a compound pendulum is
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is
Which of the following is an example of a higher pair?
Which of the following is an example of a higher pair?
The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
Oldham's coupling is the
Oldham's coupling is the
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to
When a body moves with simple harmonic motion, the product of its periodic time and frequency is equal to
A mechanism _________ for transmitting or transforming motion.
A mechanism _________ for transmitting or transforming motion.
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)
Longitudinal vibrations are said to occur when the particles of a body moves
Longitudinal vibrations are said to occur when the particles of a body moves
The moment on the pulley which produces rotation is called
The moment on the pulley which produces rotation is called
In a simple harmonic motion, the velocity vector with respect to displacement vector
In a simple harmonic motion, the velocity vector with respect to displacement vector
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.
In a reciprocating engine, usually __________ of the reciprocating masses are balanced.
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is
The maximum value of the pressure angle in case of cam is kept as
The maximum value of the pressure angle in case of cam is kept as
The Ackermann steering mechanism is preferred to the Davis type in automobiles because
The Ackermann steering mechanism is preferred to the Davis type in automobiles because
The Coriolis component of acceleration depends upon
The Coriolis component of acceleration depends upon
In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as
In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as
Cam size depends upon
Cam size depends upon
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is
Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross belt drive. The length of the belt is
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as
When two links are connected by a pin joint, their instantaneous center lies
When two links are connected by a pin joint, their instantaneous center lies
Which of the following statement is correct for involute gears?
Which of the following statement is correct for involute gears?
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to
If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to
In under damped vibrating system, the amplitude of vibration
In under damped vibrating system, the amplitude of vibration
Which of the following is false statement in respect of differences between machine and structure?
Which of the following is false statement in respect of differences between machine and structure?
What is the number of instantaneous centers for an eight link mechanism?
What is the number of instantaneous centers for an eight link mechanism?
A shaft carrying two rotors at its ends will have
A shaft carrying two rotors at its ends will have
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)
Peaucellier’s mechanism has
Peaucellier’s mechanism has
The example of spherical pair is
The example of spherical pair is
The type of gears used to connect two non parallel and non intersecting shafts is
The type of gears used to connect two non parallel and non intersecting shafts is
The brake commonly used in railway trains is
The brake commonly used in railway trains is
The frictional torque transmitted by a disc or plate clutch is same as that of
The frictional torque transmitted by a disc or plate clutch is same as that of
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
Instantaneous center of rotation of a link in a four bar mechanism lies on
Instantaneous center of rotation of a link in a four bar mechanism lies on
The motion between a pair which takes place in __________ is known as incompletely constrained motion.
The motion between a pair which takes place in __________ is known as incompletely constrained motion.
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.
In steady state forced vibrations, the amplitude of vibrations at resonance is __________ damping coefficient.
The maximum fluctuation of speed is the
The maximum fluctuation of speed is the
A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
A point on a link connecting double slider crank chain traces a
A point on a link connecting double slider crank chain traces a
The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.
The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as
At the nodal point in a shaft, the amplitude for torsional vibration will be
At the nodal point in a shaft, the amplitude for torsional vibration will be
The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)
The height of a Watt's governor (in meters) is equal to (where N = Speed of the arm and ball about the spindle axis)
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called
A body in motion will be subjected to Coriolis acceleration when that body is
A body in motion will be subjected to Coriolis acceleration when that body is
If there are L number of links in a mechanism, then number of possible inversions is equal to
If there are L number of links in a mechanism, then number of possible inversions is equal to
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.
The velocity of the rubbing surface __________ with the distance from the axis of the bearing.
Under logarithmic decrement, the amplitude of successive vibrations are
Under logarithmic decrement, the amplitude of successive vibrations are
The danger of breakage and vibration is maximum
The danger of breakage and vibration is maximum
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)
In a flat collar pivot bearing, the moment due to friction is proportional to
In a flat collar pivot bearing, the moment due to friction is proportional to
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)
In S.H.M., the velocity vector w.r.t. displacement vector
In S.H.M., the velocity vector w.r.t. displacement vector
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a
The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as
The motion between a pair when limited to a definite direction, irrespective of the direction of force applied, is known as
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is
The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is
Which of the following disciplines provides study of relative motion between the parts of a machine?
Which of the following disciplines provides study of relative motion between the parts of a machine?
The cam follower generally used in aircraft engines is
The cam follower generally used in aircraft engines is
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r₁ = Minimum radius of the cam, r₂ = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r₁ = Minimum radius of the cam, r₂ = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)
Two systems shall be dynamically equivalent when
Two systems shall be dynamically equivalent when
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is
A cam with a roller follower would constitute following type of pair
A cam with a roller follower would constitute following type of pair
The magnitude of velocities of the points on a rigid link is
The magnitude of velocities of the points on a rigid link is
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be
Which of the following is a turning pair?
Which of the following is a turning pair?
The secondary unbalanced force is __________ the primary unbalanced force.
The secondary unbalanced force is __________ the primary unbalanced force.
The centre of gravity of a coupler link in a four bar mechanism will experience
The centre of gravity of a coupler link in a four bar mechanism will experience
A completely constrained motion can be transmitted with.
A completely constrained motion can be transmitted with.
A kinematic chain requires at least
A kinematic chain requires at least
In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at
In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at
The approximate straight line mechanism is a
The approximate straight line mechanism is a
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
The inversion of a mechanism is
The inversion of a mechanism is
The example of higher pair is
The example of higher pair is
When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will
When a mass of a critically damped single degree of freedom system is deflected from its equilibrium position and released, then it will
Transmission angle is the angle between
Transmission angle is the angle between
Which type of gearing is used in steering system of an automobile?
Which type of gearing is used in steering system of an automobile?
In involute gears, the pressure angle is
In involute gears, the pressure angle is
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)
One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)
Rectangular bar in a rectangular hole is the following type of pair
Rectangular bar in a rectangular hole is the following type of pair
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by
Oldham’s coupling is an inversion of the kinematic chain used in
Oldham’s coupling is an inversion of the kinematic chain used in
In a single slider crank chain
In a single slider crank chain
When the particles of a body moves perpendicular to its axis, then the body is said to have
When the particles of a body moves perpendicular to its axis, then the body is said to have
In a four stroke I.C. engine, the turning moment during the compression stroke is
In a four stroke I.C. engine, the turning moment during the compression stroke is
Transmission of power from the engine to the rear axle of an automobile is by means of
Transmission of power from the engine to the rear axle of an automobile is by means of
