If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to
For general industrial machinery, the ratio of the length of journal to its diameter is taken as
For general industrial machinery, the ratio of the length of journal to its diameter is taken as
A column is known as a long column if the slenderness ratio is
A column is known as a long column if the slenderness ratio is
During hot working of metals,
During hot working of metals,
A locking device extensively used in marine type connecting rod ends is a
A locking device extensively used in marine type connecting rod ends is a
Which of the following is a permanent fastening?
Which of the following is a permanent fastening?
Crushing resistance required to crush the rivet per pitch length is
Crushing resistance required to crush the rivet per pitch length is
Pick up wrong statement. Fatigue strength can be increased by
Pick up wrong statement. Fatigue strength can be increased by
In order to permit the thermal expansion/contraction of tubing, it should be
In order to permit the thermal expansion/contraction of tubing, it should be
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
Pitch point of a cam is
Pitch point of a cam is
Maximum principal stress theory is applicable for
Maximum principal stress theory is applicable for
The cam follower generally used in automobile engines is
The cam follower generally used in automobile engines is
When a belt drive is transmitting maximum power,
When a belt drive is transmitting maximum power,
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads
When a nut is tightened by placing a washer below it, the bolt will be subjected to following type of loads
Which is correct statement?
Which is correct statement?
Which of the following spring is used in mechanical wrist watch?
Which of the following spring is used in mechanical wrist watch?
Two shafts will have equal strength, if
Two shafts will have equal strength, if
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,
When two non-parallel or intersecting but coplanar shafts are connected by gears, the arrangement is known as,
The load cup of a screw jack is made separate from the head of the spindle to
The load cup of a screw jack is made separate from the head of the spindle to
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing
Brittle coating technique is used for
Brittle coating technique is used for
The largest diameter of an external or internal screw thread is known as
The largest diameter of an external or internal screw thread is known as
The period during which the cam follower remains at rest, when cam moves, is known as
The period during which the cam follower remains at rest, when cam moves, is known as
In designing a connecting rod, it is considered like __________ for buckling about X-axis.
In designing a connecting rod, it is considered like __________ for buckling about X-axis.
The efficiency of a square threaded screw is maximum if the helix angle is equal to
(Where φ = Angle of friction)
The efficiency of a square threaded screw is maximum if the helix angle is equal to
(Where φ = Angle of friction)
According to Rankine's theory, the failure occurs at a point in a member
According to Rankine's theory, the failure occurs at a point in a member
The shock absorbing capacity of a bolt can be increased by
The shock absorbing capacity of a bolt can be increased by
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.
The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.
The included angle between the sides of V-belt is
The included angle between the sides of V-belt is
The lead angle of a worm is 22.5°. Its helix angle will be
The lead angle of a worm is 22.5°. Its helix angle will be
For same pulley diameters, center distance, belt speed and belt and pulley materials,
For same pulley diameters, center distance, belt speed and belt and pulley materials,
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
When the connected members are very yielding (soft gasket) as compared to the bolt, then the resultant load on the bolt will be equal to the
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by
In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by
For applications involving high stresses in one direction only the following type of thread would be best suited
For applications involving high stresses in one direction only the following type of thread would be best suited
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?
Shear stress theory is applicable for
Shear stress theory is applicable for
Three different weights fall from a certain height under vacuum. They will take
Three different weights fall from a certain height under vacuum. They will take
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to
In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to
A backing ring is used inside the pipe joint when making a
A backing ring is used inside the pipe joint when making a
Oldham coupling is used to connect two shafts
Oldham coupling is used to connect two shafts
The algebraic difference between the maximum limit and the basic size is called
The algebraic difference between the maximum limit and the basic size is called
The power transmitted by the belt drive can be increased by
The power transmitted by the belt drive can be increased by
Rankine's theory is used for
Rankine's theory is used for
A flange coupling is used to connect two shafts
A flange coupling is used to connect two shafts
The helix angle for double helical gears may be made up to
The helix angle for double helical gears may be made up to
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to
In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia. of rivet d should be equal to
The piston pin bearings in heavy duty diesel engines are
The piston pin bearings in heavy duty diesel engines are
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be
According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be
Which of the following statement is correct regarding power screws?
Which of the following statement is correct regarding power screws?
The smallest diameter of an external or internal screw thread is known as
The smallest diameter of an external or internal screw thread is known as
Creep in belt is due to
Creep in belt is due to
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.
The centrifugal tension in the belt
The centrifugal tension in the belt
When spring index increases, the value of Wahl's stress factor
When spring index increases, the value of Wahl's stress factor
Taper usually provided on cotter is
Taper usually provided on cotter is
The function of a washer is to
The function of a washer is to
Oil in journal bearing should be applied at the point where load is
Oil in journal bearing should be applied at the point where load is
The material used for brake lining should have __________ coefficient of friction.
The material used for brake lining should have __________ coefficient of friction.
The surface finish factor for a mirror polished material is
The surface finish factor for a mirror polished material is
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be
For a shaft diameter of 100 mm, the number of bolts in a flange coupling should be
Silver based solder is used for
Silver based solder is used for
The cross-section of the arm of a bell crank lever is
The cross-section of the arm of a bell crank lever is
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as
The property of a material which enables it to resist fracture due to high impact loads is known as
The property of a material which enables it to resist fracture due to high impact loads is known as
In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)
In a band and block brake, the ratio of tensions on the tight and slack sides of band is given by (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the centre of drum, and n = Number of blocks)
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited
If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited
Fabric belts are used in industrial applications because
Fabric belts are used in industrial applications because
Slenderness ratio is the ratio of
Slenderness ratio is the ratio of
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be
The spring mostly used in gramophones is
The spring mostly used in gramophones is
A transmission shaft includes
A transmission shaft includes
Ball bearing type screws are found in following application
Ball bearing type screws are found in following application
The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to
The bending moment ‘M’ and a torque ‘T’ is applied on a solid circular shaft. If the maximum bending stress equals to maximum shear stress developed, then ‘M’ is equal to
In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
In the levers of __________ type, the mechanical advantage is less than one.
In the levers of __________ type, the mechanical advantage is less than one.
The material commonly used for machine tool bodies is
The material commonly used for machine tool bodies is
When the belt is transmitting maximum power,
When the belt is transmitting maximum power,
The strength of a riveted joint is equal to
The strength of a riveted joint is equal to
Aircraft body is usually fabricated by
Aircraft body is usually fabricated by
The included angle for the British standard whitworth thread is
The included angle for the British standard whitworth thread is
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
According to I.B.R., the efficiency of a triple riveted butt joint with double straps of unequal width (5 rivets per pitch length) should be
The taper on key is given on
The taper on key is given on
The elasticity is the property of a material which enables it to
The elasticity is the property of a material which enables it to
The maximum normal stress theory is used for
The maximum normal stress theory is used for
A self locking screw has
A self locking screw has
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be
The ratio of endurance limit in shear to the endurance limit in flexure is
The ratio of endurance limit in shear to the endurance limit in flexure is
Which of the following statement is correct for gears?
Which of the following statement is correct for gears?
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be
A coupling used to connect two perfectly aligned shafts, is
A coupling used to connect two perfectly aligned shafts, is
The plasticity is the property of a material which enables it to
The plasticity is the property of a material which enables it to
A hollow saddle key is
A hollow saddle key is
The pitch of threads on a Jock nut in comparison to pitch of nut is
The pitch of threads on a Jock nut in comparison to pitch of nut is
Eye bolts are used for
Eye bolts are used for
A hot short metal is
A hot short metal is
The pitch diameter is the __________ diameter of an external or internal screw thread.
The pitch diameter is the __________ diameter of an external or internal screw thread.
In hydrodynamic bearings
In hydrodynamic bearings
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by
Two closely coiled helical springs with stiffness k₁ and k₂ respectively are connected in series. The stiffness of an equivalent spring is given by
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)
The diameter of knuckle pin in a knuckle joint is usually taken as (where d = Diameter of the rod)
The difference between the upper limit and lower limit of a dimension is called
The difference between the upper limit and lower limit of a dimension is called
The temperature at which the new grains are formed in the metal is known as
The temperature at which the new grains are formed in the metal is known as
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is
A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is
Euler’s formula for a mild steel column is not valid if the slenderness ratio is
Euler’s formula for a mild steel column is not valid if the slenderness ratio is
Deep groove ball bearings are used for
Deep groove ball bearings are used for
A locking device extensively used in automobile industry is a
A locking device extensively used in automobile industry is a
Form coefficient of spring is
Form coefficient of spring is
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
In a turnbuckle, if one of the rods has left hand threads, then the other rod will have
A universal coupling is used to connect two shafts
A universal coupling is used to connect two shafts
Rankine Gordon formula for buckling is valid for
Rankine Gordon formula for buckling is valid for
A localized compressive stress at the area of contact between two members is known as
A localized compressive stress at the area of contact between two members is known as
A screw is said to be over hauling screw, if its efficiency is
A screw is said to be over hauling screw, if its efficiency is
The shear stress in a beam varies from zero at the outer fibers to a maximum at the________.
The shear stress in a beam varies from zero at the outer fibers to a maximum at the________.
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.
The endurance limit for a mirror polished material will be __________ as compared to unpolished material.
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the
A screw is said to be over hauling screw, if the
A screw is said to be over hauling screw, if the
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called
The property of a bearing material which has the ability to accommodate small particles of dust, grit etc. without scoring the material of the journal, is called
The material commonly used for crane hooks is
The material commonly used for crane hooks is
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.
In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.
The width of the pulley should be __________ width of the belt.
The width of the pulley should be __________ width of the belt.
A bolt of uniform strength can be developed by
A bolt of uniform strength can be developed by
In a marine flange coupling, the thickness of flange is taken as
In a marine flange coupling, the thickness of flange is taken as
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be
The process which improves the machinability of steels, but lowers the hardness and tensile strength is
The process which improves the machinability of steels, but lowers the hardness and tensile strength is
The gears are termed as medium velocity gears, if their peripheral velocity is
The gears are termed as medium velocity gears, if their peripheral velocity is
When a helical compression spring is cut into halves, the stiffness of the resulting spring will be
When a helical compression spring is cut into halves, the stiffness of the resulting spring will be
The efficiency of a riveted joint is equal to
The efficiency of a riveted joint is equal to
A type of brake commonly used in motor cars is a
A type of brake commonly used in motor cars is a
The taper on cotter varies from
The taper on cotter varies from
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)
The maximum shear stress theory is used for
The maximum shear stress theory is used for
In unilateral system of tolerance, the tolerance is allowed on
In unilateral system of tolerance, the tolerance is allowed on
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to
When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to
The belt slip occurs due to
The belt slip occurs due to
In V-belt drive, belt touches
In V-belt drive, belt touches
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be
The design of pin of a rocker arm of an I.C. engine is based on
The design of pin of a rocker arm of an I.C. engine is based on
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?
Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?
The draw of cotter need not exceed
The draw of cotter need not exceed
Guest's theory is used for
Guest's theory is used for
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is
Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is
A screw is said to be a self locking screw, if its efficiency is
A screw is said to be a self locking screw, if its efficiency is
The rolling contact bearings are known as
The rolling contact bearings are known as
A connecting rod should be
A connecting rod should be
For hardening alloy steels and high speed steels, they are heated to
For hardening alloy steels and high speed steels, they are heated to
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test
Tensile strength of a mild steel specimen can be roughly predicted from following hardness test
The contact ratio is the ratio of
The contact ratio is the ratio of
The product of the diametral pitch and circular pitch is equal to
The product of the diametral pitch and circular pitch is equal to
