A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is
A spring of stiffness 1000 N/m is stretched initially by 100 mm from the undeformed position. The work required to stretch it by another 100 mm is
In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of
In the calculation of induced shear stress in helical springs, the Wahl's stress factor is used to take care of
Cold working
Cold working
Buttress threads are usually found on
Buttress threads are usually found on
The included angle for the British Association thread is
The included angle for the British Association thread is
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon
A woodruff key is
A woodruff key is
Basic shaft is one
Basic shaft is one
Which of the following material has the maximum ductility?
Which of the following material has the maximum ductility?
Resistance to fatigue of a material is measured by
Resistance to fatigue of a material is measured by
In most machine members, the damping capacity of the material should be
In most machine members, the damping capacity of the material should be
Basic hole is one
Basic hole is one
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to
In a steam engine, the valve rod is connected to an eccentric rod by means of
In a steam engine, the valve rod is connected to an eccentric rod by means of
Tapered roller bearings can take
Tapered roller bearings can take
In nitrated parts, the origins of the fatigue cracks will occur at
In nitrated parts, the origins of the fatigue cracks will occur at
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,
A tapered key which fits in a key way in the hub and the bottom of which is shaped to fit the curved surface of the shaft, is known as,
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation
If d is the normal diameter of a bolt in mm, then the initial tension in kg in a bolt used for making a fluid tight joint as for steam engine cover joint is calculated by the relation
The resultant axial load on a bolt depends upon
The resultant axial load on a bolt depends upon
Rivets are generally specified by
Rivets are generally specified by
Which of the following has threads at both ends?
Which of the following has threads at both ends?
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
According to I.B.R., when the thickness of boiler shell (t) is greater than 8 mm, then the diameter of rivet hole (d) is obtained by
Which of the following statement is wrong?
Which of the following statement is wrong?
Allen bolts are
Allen bolts are
The rocker arms in internal combustion engines are of__________.
The rocker arms in internal combustion engines are of__________.
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)
A plate with an elliptical hole in the centre, with semi-major axis (a) perpendicular to the direction of loading and semi-minor axis (b) along the direction of loading, is subjected to a pull P. The maximum stress induced at the edge of the hole is equal to (where σ = Stress for a plate with no hole i.e. nominal stress)
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
The difference between the tooth space and the tooth thickness as measured on the pitch circle, is called
The size of a gear is usually specified by
The size of a gear is usually specified by
Which of the following statement is wrong for a connecting rod?
Which of the following statement is wrong for a connecting rod?
18/8 steel contains
18/8 steel contains
The resistance to fatigue of a material is measured by
The resistance to fatigue of a material is measured by
A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is
A circular shaft can transmit a torque of 5 kN-m. If the torque is reduced to 4 kN-m, then the maximum value of bending moment that can be applied to the shaft is
The shock resistance of steel is increased by adding
The shock resistance of steel is increased by adding
The contact ratio for gears is
The contact ratio for gears is
The expansion joint is mostly used for pipes which carry steam at __________ pressures.
The expansion joint is mostly used for pipes which carry steam at __________ pressures.
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)
When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring)
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
Two shafts A and B are made of the same material. The diameter of shaft A is twice as that of shaft B. The power transmitted by the shaft A will be __________ of shaft B.
The power transmitted by means of a belt depends upon
The power transmitted by means of a belt depends upon
Shaft coupling is used in machinery to
Shaft coupling is used in machinery to
A crankshaft is a __________ shaft.
A crankshaft is a __________ shaft.
The square threads are usually found on
The square threads are usually found on
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
An elastic bar is fixed at the upper end and loaded at the lower end by a falling weight. The shock load produced can be reduced by
According to Indian standards, total numbers of fundamental deviations are
According to Indian standards, total numbers of fundamental deviations are
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing.
Which of the following statement is wrong?
Which of the following statement is wrong?
The dedendum circle diameter is equal to (where φ = Pressure angle)
The dedendum circle diameter is equal to (where φ = Pressure angle)
The rolling contact bearings as compared to sliding contact bearings have
The rolling contact bearings as compared to sliding contact bearings have
The stress induced in the belt is,
The stress induced in the belt is,
The fatigue life of a part can be improved by
The fatigue life of a part can be improved by
The value of stress concentration factor depends upon
The value of stress concentration factor depends upon
A steel containing 0.8% carbon is known as
A steel containing 0.8% carbon is known as
In a multiple V-belt drive, if one of the belts break, then
In a multiple V-belt drive, if one of the belts break, then
In radial bearings, the load acts __________ to the axis of rotation.
In radial bearings, the load acts __________ to the axis of rotation.
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by
A double fillet welded joint with parallel fillet weld of length 'l' and leg 's' is subjected to a tensile force 'P'. Assuming uniform stress distribution, the shear stress in the weld is given by
Stress concentration factor is defined as the ratio of
Stress concentration factor is defined as the ratio of
The process extensively used for making bolts and nuts is
The process extensively used for making bolts and nuts is
A key way lowers
A key way lowers
The acme threads are usually found on
The acme threads are usually found on
Which one of the following is a positive drive?
Which one of the following is a positive drive?
For tight leakage joints, following type of thread is best suited
For tight leakage joints, following type of thread is best suited
Which of the following bearing is preferred for oscillating conditions?
Which of the following bearing is preferred for oscillating conditions?
Machine screws are
Machine screws are
In second type of levers,
In second type of levers,
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the
According to Indian standard specifications, a Grey cast iron designated by 'FG 200' means that the
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
While designing a screw in a screw jack against buckling failure, the end conditions for the screw are taken as
Wire ropes as compared to cotton ropes
Wire ropes as compared to cotton ropes
Which of the following property is desirable in parts subjected to shock and impact loads?
Which of the following property is desirable in parts subjected to shock and impact loads?
Cap screws are
Cap screws are
Which of the following cotter joint will be used to connect strap end of a connecting rod?
Which of the following cotter joint will be used to connect strap end of a connecting rod?
Which of the following statement is wrong?
Which of the following statement is wrong?
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
A steel containing up to 0.15% carbon is known as
A steel containing up to 0.15% carbon is known as
The V-belts are particularly suitable for __________ drives.
The V-belts are particularly suitable for __________ drives.
A riveted joint is a __________ fastening.
A riveted joint is a __________ fastening.
The designation M 33 × 2 of a bolt means
The designation M 33 × 2 of a bolt means
According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by
According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by
Gears are casted by
Gears are casted by
The following type of nut is used with alien bolt
The following type of nut is used with alien bolt
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)
The ratio of driving tensions for flat belts, neglecting centrifugal tension, is (where T₁, and T₂ = Tensions on the tight and slack sides of belt respectively, μ = Coefficient of friction, between the belt and pulley, and θ = Angle of contact)
Which is correct statement? Stress concentration in cyclic loading is
Which is correct statement? Stress concentration in cyclic loading is
The resultant axial load on a bolt depends on
The resultant axial load on a bolt depends on
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that
Two shafts ‘A’ and ‘B’ under pure torsion are of identical length and identical weight and are made of the same material. The shaft ‘A’ is solid and the shaft ‘B’ is hollow. We can say that
Which of the following statement is wrong?
Which of the following statement is wrong?
Which of the following statement is correct, for two shafts connected in parallel?
Which of the following statement is correct, for two shafts connected in parallel?
A bolt of M 24 × 2 means that
A bolt of M 24 × 2 means that
An alien bolt is
An alien bolt is
Lewis equation in gears is used to find the
Lewis equation in gears is used to find the
At low temperatures (say 75°C) the notched bar impact value of steel
At low temperatures (say 75°C) the notched bar impact value of steel
A single strap butt joint is always in __________ shear.
A single strap butt joint is always in __________ shear.
Which of the following formula is used in designing a connecting rod?
Which of the following formula is used in designing a connecting rod?
The material generally used for aircraft components is
The material generally used for aircraft components is
A connecting rod subjected to an axial load may buckle with
A connecting rod subjected to an axial load may buckle with
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because
In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged belt because
In a marine flange coupling, the pitch circle diameter of bolts is taken as
In a marine flange coupling, the pitch circle diameter of bolts is taken as
All stresses produced in a belt are
All stresses produced in a belt are
