A key way lowers
A key way lowers
The fatigue life of a part can be improved by
The fatigue life of a part can be improved 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
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
Basic shaft is one
Basic shaft is one
The resultant axial load on a bolt depends upon
The resultant axial load on a bolt depends upon
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
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?
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
The rolling contact bearings as compared to sliding contact bearings have
The rolling contact bearings as compared to sliding contact bearings have
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
Which is correct statement? Stress concentration in cyclic loading is
Which is correct statement? Stress concentration in cyclic loading is
Which of the following statement is wrong for a connecting rod?
Which of the following statement is wrong for a connecting rod?
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
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)
A crankshaft is a __________ shaft.
A crankshaft is a __________ shaft.
A bolt of M 24 × 2 means that
A bolt of M 24 × 2 means that
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
The stress induced in the belt is,
The stress induced in the belt is,
The resistance to fatigue of a material is measured by
The resistance to fatigue of a material is measured by
The designation M 33 × 2 of a bolt means
The designation M 33 × 2 of a bolt means
The acme threads are usually found on
The acme threads are usually found on
Resistance to fatigue of a material is measured by
Resistance to fatigue of a material is measured by
The power transmitted by means of a belt depends upon
The power transmitted by means of a belt depends upon
Allen bolts are
Allen bolts are
Which of the following material has the maximum ductility?
Which of the following material has the maximum ductility?
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
Lewis equation in gears is used to find the
Lewis equation in gears is used to find the
Which of the following statement is wrong?
Which of the following statement is wrong?
Which of the following bearing is preferred for oscillating conditions?
Which of the following bearing is preferred for oscillating conditions?
The rocker arms in internal combustion engines are of__________.
The rocker arms in internal combustion engines are of__________.
A riveted joint is a __________ fastening.
A riveted joint is a __________ fastening.
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)
According to Indian standards, total numbers of fundamental deviations are
According to Indian standards, total numbers of fundamental deviations are
A steel containing up to 0.15% carbon is known as
A steel containing up to 0.15% carbon is known as
The size of a gear is usually specified by
The size of a gear is usually specified by
In second type of levers,
In second type of levers,
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 V-belts are particularly suitable for __________ drives.
The V-belts are particularly suitable for __________ drives.
Cap screws are
Cap screws are
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)
A connecting rod subjected to an axial load may buckle with
A connecting rod subjected to an axial load may buckle with
The included angle for the British Association thread is
The included angle for the British Association thread is
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
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
18/8 steel contains
18/8 steel contains
All stresses produced in a belt are
All stresses produced in a belt are
The dedendum circle diameter is equal to (where φ = Pressure angle)
The dedendum circle diameter is equal to (where φ = Pressure angle)
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
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
The process extensively used for making bolts and nuts is
The process extensively used for making bolts and nuts 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.
A single strap butt joint is always in __________ shear.
A single strap butt joint is always in __________ shear.
The shock resistance of steel is increased by adding
The shock resistance of steel is increased by adding
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
Stress concentration factor is defined as the ratio of
Stress concentration factor is defined as the ratio of
In nitrated parts, the origins of the fatigue cracks will occur at
In nitrated parts, the origins of the fatigue cracks will occur at
Tapered roller bearings can take
Tapered roller bearings can take
An alien bolt is
An alien bolt is
Basic hole is one
Basic hole is one
The material generally used for aircraft components is
The material generally used for aircraft components is
Machine screws are
Machine screws are
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
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?
In most machine members, the damping capacity of the material should be
In most machine members, the damping capacity of the material should be
For tight leakage joints, following type of thread is best suited
For tight leakage joints, following type of thread is best suited
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.
A steel containing 0.8% carbon is known as
A steel containing 0.8% carbon is known as
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 value of stress concentration factor depends upon
The value of stress concentration factor depends upon
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
Which of the following statement is wrong?
Which of the following statement is wrong?
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 one of the following is a positive drive?
Which one of the following is a positive drive?
The square threads are usually found on
The square threads are usually found on
A woodruff key is
A woodruff key is
Which of the following statement is wrong?
Which of the following statement is wrong?
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
Which of the following statement is wrong?
Which of the following statement is wrong?
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
Cold working
Cold working
Which of the following has threads at both ends?
Which of the following has threads at both ends?
Gears are casted by
Gears are casted by
Buttress threads are usually found on
Buttress threads are usually found on
Rivets are generally specified by
Rivets are generally specified by
The following type of nut is used with alien bolt
The following type of nut is used with alien bolt
The resultant axial load on a bolt depends on
The resultant axial load on a bolt depends on
Wire ropes as compared to cotton ropes
Wire ropes as compared to cotton ropes
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
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
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?
The contact ratio for gears is
The contact ratio for gears is
Shaft coupling is used in machinery to
Shaft coupling is used in machinery to
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
In radial bearings, the load acts __________ to the axis of rotation.
In radial bearings, the load acts __________ to the axis of rotation.
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,
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.
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
