The endurance limit of a material with finished surface in comparison to rough surface is
The endurance limit of a material with finished surface in comparison to rough surface is
Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)
Lewis form factor for 14½° composite and full depth involute system is (where T = Number of teeth)
When a machine member is subjected to torsion, the torsional shear stress set up in the member is
When a machine member is subjected to torsion, the torsional shear stress set up in the member is
In Vickers hardness testing, the pyramid indentor apex is
In Vickers hardness testing, the pyramid indentor apex is
A column of length l is fixed at both ends. The equivalent length of the column is
A column of length l is fixed at both ends. The equivalent length of the column is
Wahl's stress factor __________ very rapidly as the spring index decreases.
Wahl's stress factor __________ very rapidly as the spring index decreases.
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
For maximum power, the velocity of the belt will be
For maximum power, the velocity of the belt will be
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
A shaft is subjected to fluctuating loads for which the normal torque (T) and bending moment (M) are 1000 N-m and 500 N-m respectively. If the combined shock and fatigue factor for bending is 1.5 and combined shock and fatigue factor for torsion is 2, then the equivalent twisting moment for the shaft is
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
Which one of the following loading is considered for the design of axles?
Which one of the following loading is considered for the design of axles?
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils)
A double strap butt joint (with equal straps) is
A double strap butt joint (with equal straps) is
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be
A metal pipe of 1 m diameter contains a fluid having a pressure of 1 N/mm². If the permissible tensile stress in the metal is 20 N/mm², then the thickness of the metal required for making the pipe will be
For circumferential joint in boilers, the type of joint used is
For circumferential joint in boilers, the type of joint used is
The washer is generally specified by its
The washer is generally specified by its
The bending stress in a curved beam is
The bending stress in a curved beam is
The rated life of a bearing varies
The rated life of a bearing varies
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by
The face angle of a bevel gear is equal to
The face angle of a bevel gear is equal to
The function of the washer is to
The function of the washer is to
The yield point in static loading is __________ as compared to fatigue loading.
The yield point in static loading is __________ as compared to fatigue loading.
For low and moderate speed engines, the cam follower should move with
For low and moderate speed engines, the cam follower should move with
In order to obtain bolt of uniform strength
In order to obtain bolt of uniform strength
According to Indian standard specifications, 100 H6/g5 means that
According to Indian standard specifications, 100 H6/g5 means that
When a bolt is subjected to an external load, the stress induced in the bolt will be
When a bolt is subjected to an external load, the stress induced in the bolt will be
Auto frettage is the method of
Auto frettage is the method of
In the levers of first type, the mechanical advantage is ________ one.
In the levers of first type, the mechanical advantage is ________ one.
The ratio of pitch circle diameter in millimeters to the number of teeth, is called
The ratio of pitch circle diameter in millimeters to the number of teeth, is called
The centre to centre distance between two consecutive rivets in a row, is called
The centre to centre distance between two consecutive rivets in a row, is called
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for
The edges of the plates for cylindrical vessels are usually bevelled to an angle of 80° for
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)
The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)
A V-belt designated as B 4430 LP has
A V-belt designated as B 4430 LP has
Taper on the cotter and slot is provided
Taper on the cotter and slot is provided
According to I.B.R., the factor of safety of riveted joint should not be less than
According to I.B.R., the factor of safety of riveted joint should not be less than
The notch angle of the Izod impact test specimen is
The notch angle of the Izod impact test specimen is
According to I.B.R., the thickness of the boiler shell should not be less than
According to I.B.R., the thickness of the boiler shell should not be less than
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
The pipe joint mostly used for pipes carrying water at low pressures is
The pipe joint mostly used for pipes carrying water at low pressures is
The draw of cotter should not be more than
The draw of cotter should not be more than
When the fulcrum is in between the load and effort, the lever is said to be of
When the fulcrum is in between the load and effort, the lever is said to be of
A connecting rod is designed as a
A connecting rod is designed as a
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)
A feather key is generally
A feather key is generally
In case of pressure vessels having closed ends, the fluid pressure induces
In case of pressure vessels having closed ends, the fluid pressure induces
In designing thick cylinders, the equation used is
In designing thick cylinders, the equation used is
In standard taper roller bearings, the angle of taper of outer raceway is
In standard taper roller bearings, the angle of taper of outer raceway is
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will
The number of slots in a 25 mm castle nut is
The number of slots in a 25 mm castle nut is
A screw will be self locking, if
A screw will be self locking, if
The buckling load will be maximum for a column, if
The buckling load will be maximum for a column, if
In a horizontal flat belt drive, it is customary to use
In a horizontal flat belt drive, it is customary to use
The coefficient of friction between the belt and pulley depends upon the
The coefficient of friction between the belt and pulley depends upon the
The objective of 'crowning' of the flat pulleys of belt drive is to
The objective of 'crowning' of the flat pulleys of belt drive is to
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called
The longitudinal joint in boilers is used to get the required
The longitudinal joint in boilers is used to get the required
The face of the tooth is the
The face of the tooth is the
The flank of the tooth is the
The flank of the tooth is the
In case of pressure vessels having open ends, the fluid pressure induces
In case of pressure vessels having open ends, the fluid pressure induces
The centrifugal tension in belts
The centrifugal tension in belts
Stress concentration is caused due to
Stress concentration is caused due to
The objective of idler pulley in belt drive is to
The objective of idler pulley in belt drive is to
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called
The property of a material which enables it to be drawn into wires with the application of a tensile force, is called
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
The suitable material for belt used in flour mill is
The suitable material for belt used in flour mill is
The valve rod in a steam engine is connected to an eccentric rod by
The valve rod in a steam engine is connected to an eccentric rod by
A saddle key __________ power through frictional resistance only.
A saddle key __________ power through frictional resistance only.
In oilness bearings
In oilness bearings
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than
According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)
According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm)
A screw is specified by its
A screw is specified by its
Transverse fillet welded joints are designed for
Transverse fillet welded joints are designed for
Belt slip may occur due to
Belt slip may occur due to
The sleeve or muff coupling is designed as a
The sleeve or muff coupling is designed as a
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be
When screw threads are to be used in a situation where power is being transmitted in one direction only, then the screw threads suitable for this will be
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
In leaf springs, the longest leaf is known as
In leaf springs, the longest leaf is known as
The groove angle of the pulley for rope drive is usually
The groove angle of the pulley for rope drive is usually
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
The velocity of sliding __________ the distance of the point of contact from the pitch point.
The velocity of sliding __________ the distance of the point of contact from the pitch point.
The size of a cam depends upon
The size of a cam depends upon
The root angle of a bevel gear is equal to
The root angle of a bevel gear is equal to
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
According to Indian standards, a bolt thread of 6 mm size of coarse pitch and with allowance on the threads and normal tolerance grade is designated as
Which one of the following loading is considered for the design of axles?
Which one of the following loading is considered for the design of axles?
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be
For longitudinal joint in boilers, the type of joint used is
For longitudinal joint in boilers, the type of joint used is
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
In a gear, having Involute teeth, the normal to the Involute is a tangent to the
In a gear, having Involute teeth, the normal to the Involute is a tangent to the
In block brakes, the ratio of shoe width to wheel diameter is taken between
In block brakes, the ratio of shoe width to wheel diameter is taken between
In a flange coupling, the bolts are subjected to
In a flange coupling, the bolts are subjected to
A cotter joint is used to connect two __________ rods.
A cotter joint is used to connect two __________ rods.
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.
When the bearing is subjected to large fluctuations of load and heavy impacts, the bearing characteristic number should be _________ the bearing modulus.
For high speed engines, the cam follower should move with
For high speed engines, the cam follower should move with
The form factor of a helical gear __________ with the increase in the helix angle.
The form factor of a helical gear __________ with the increase in the helix angle.
