The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at
The sense of Coriolis component 2 ωv is same as that of the relative velocity vector v rotated at
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
The method of direct and reverse cranks is used in engines for
The method of direct and reverse cranks is used in engines for
In a reciprocating steam engine, which of the following forms a kinematic link?
In a reciprocating steam engine, which of the following forms a kinematic link?
A spring controlled governor is said to be isochronous when the controlling force
A spring controlled governor is said to be isochronous when the controlling force
The dynamic friction is the friction experienced by a body, when the body
The dynamic friction is the friction experienced by a body, when the body
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called
The working depth of a gear is the radial distance from the
The working depth of a gear is the radial distance from the
The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at
The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)
Rectilinear motion of piston is converted into rotary by
Rectilinear motion of piston is converted into rotary by
In which of the following type of gear train the first gear and the last gear are co-axial.
In which of the following type of gear train the first gear and the last gear are co-axial.
Hart mechanism has
Hart mechanism has
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)
Cross head and guides form a
Cross head and guides form a
For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a
For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a
In the two rotor system as shown in the below figure (I₁ < I₂), a node of vibration is situated
In the two rotor system as shown in the below figure (I₁ < I₂), a node of vibration is situated
The Coriolis component of acceleration acts
The Coriolis component of acceleration acts
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to
The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
The mechanism in which two are turning pairs and two are sliding pairs, is called a
The mechanism in which two are turning pairs and two are sliding pairs, is called a
Which of the following statement is wrong?
Which of the following statement is wrong?
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)
The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.
The lower pair is a
The lower pair is a
The height of a Watt's governor is
The height of a Watt's governor is
Carnot cycle is
Carnot cycle is
The number of links in pantograph mechanism is equal to
The number of links in pantograph mechanism is equal to
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)
In a pantograph, all the pairs are
In a pantograph, all the pairs are
In a four bar chain or quadric cycle chain
In a four bar chain or quadric cycle chain
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from
In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from
A system in dynamic balance implies that
A system in dynamic balance implies that
Which of the following statement is wrong?
Which of the following statement is wrong?
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is
A point on a connecting link (excluding end points) of a double slider crank mechanism traces a
A point on a connecting link (excluding end points) of a double slider crank mechanism traces a
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
The radial distance of a tooth from the pitch circle to the bottom of the tooth is called
A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be
A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be
A spring controlled governor is found unstable. It can be made stable by
A spring controlled governor is found unstable. It can be made stable by
The angle of inclination of the plane, at which the body begins to move down the plane is called
The angle of inclination of the plane, at which the body begins to move down the plane is called
The unbalanced primary forces in a reciprocating engine are
The unbalanced primary forces in a reciprocating engine are
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The minimum length of the coupler will be
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is
The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.
When the primary direct crank of a reciprocating engine makes an angle of 'θ' with the line of stroke, then the secondary direct crank will make an angle of _________ with the line of stroke.
A rotary internal combustion engine has __________ cylinders.
A rotary internal combustion engine has __________ cylinders.
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a
The C.G. of a link in any mechanism would experience
The C.G. of a link in any mechanism would experience
The indicator using Watt mechanism is known as
The indicator using Watt mechanism is known as
The example of successfully constrained motion is a
The example of successfully constrained motion is a
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because
For dynamic balancing of a shaft
For dynamic balancing of a shaft
The Scott-Russell mechanism consists of
The Scott-Russell mechanism consists of
When one of the links of a kinematic chain is fixed, the chain is known as a
When one of the links of a kinematic chain is fixed, the chain is known as a
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?
A governor is said to be stable, if the
A governor is said to be stable, if the
Elements of pairs held together mechanically is known as
Elements of pairs held together mechanically is known as
In a ball bearing, ball and bearing forms a
In a ball bearing, ball and bearing forms a
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
A pulley and belt in a belt drive form a
A pulley and belt in a belt drive form a
Module of a gear is
Module of a gear is
A spring controlled governor is said to be unstable when the controlling force
A spring controlled governor is said to be unstable when the controlling force
In railway axle boxes, the bearing used is
In railway axle boxes, the bearing used is
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)
The natural frequency of free torsional vibrations of a shaft is equal to (where q = Torsional stiffness of the shaft, and I = Mass moment of inertia of the disc attached at the end of a shaft)
The factor which affects the critical speed of a shaft is
The factor which affects the critical speed of a shaft is
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
Angular acceleration of a link can be determined by dividing the
Angular acceleration of a link can be determined by dividing the
To obviate axial thrust, following gear drive is used
To obviate axial thrust, following gear drive is used
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to
Frequency of vibrations is usually expressed in
Frequency of vibrations is usually expressed in
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
The natural frequency of free transverse vibrations due to uniformly distributed load acting over a simply supported shaft is (where δS = Static deflection of simply supported shaft due to uniformly distributed load)
The natural frequency of free transverse vibrations due to uniformly distributed load acting over a simply supported shaft is (where δS = Static deflection of simply supported shaft due to uniformly distributed load)
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed
The purpose of a link is to
The purpose of a link is to
Which of the following statements regarding laws governing the friction between dry surfaces are correct?
Which of the following statements regarding laws governing the friction between dry surfaces are correct?
Whitworth quick return mechanism is obtained by inversion of
Whitworth quick return mechanism is obtained by inversion of
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
In multi V-belt transmission, if one of the belt is broken, we have to change the
In multi V-belt transmission, if one of the belt is broken, we have to change the
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is
(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is
(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is
The example of completely constrained motion is a
The example of completely constrained motion is a
The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to
The tractive force is maximum or minimum when the angle of inclination of crank with the line of stroke (θ) is equal to
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to
In a multiple V-belt drive, when a single belt is damaged, it is preferable to change the complete set to
In a hydrodynamic journal bearing, there is
In a hydrodynamic journal bearing, there is
The dedendum circle diameter is equal to (where, φ = Pressure angle)
The dedendum circle diameter is equal to (where, φ = Pressure angle)
In a shaper mechanism, the Coriolis component of acceleration will
In a shaper mechanism, the Coriolis component of acceleration will
The lead screw of a lathe with nut forms a
The lead screw of a lathe with nut forms a
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be
The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be
In a rigid link OA, velocity of 'A' w.r.t. 'O' will be
In a rigid link OA, velocity of 'A' w.r.t. 'O' will be
A slider crank chain consists of following numbers of turning and sliding pairs
A slider crank chain consists of following numbers of turning and sliding pairs
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)
Effort of a governor is the
Effort of a governor is the
Maximum fluctuation of energy in a flywheel is equal to [where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = (ω₁ + ω₂)/2]
Maximum fluctuation of energy in a flywheel is equal to [where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = (ω₁ + ω₂)/2]
There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is
There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is
The main disadvantage of the sliding pair is that it is
The main disadvantage of the sliding pair is that it is
The gear train usually employed in clocks is a
The gear train usually employed in clocks is a
Power of a governor is the
Power of a governor is the
Which is the false statement about the properties of instantaneous center?
Which is the false statement about the properties of instantaneous center?
