A bolt is designed on the basis of __________ with a large factor of safety.
In order to ensure self locking in a screw jack, it is essential that helix angle is __________ friction angle.
When the frictional force helps to apply the brake, then the brake is said to be self-energizing brake.
The temperature at which the new grains are formed in the metal is known as
Multiple threads are used to secure
The working of metals above the recrystallisation temperature is known as hot working.
When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.
Deep groove ball bearings are used for
The fatigue limit of a material is greatly decreased by poor surface conditions.
In a flange coupling, the bolts are subjected to
In a steam engine, the piston rod is usually connected to the crosshead by means of a
The contact ratio for gears is
The shear modulus of resilience is proportional to
The value of Lewis form factor used in design of gears is
The ratio of number of teeth to the pitch circle diameter in millimetres is called circular pitch.
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 pressure angle of a cam is the angle between the direction of the follower motion and a normal to the pitch curve.
The fatigue stress concentration factor is defined as
The radial distance from the top of a tooth to the bottom of a tooth is called clearance
Lewis equation is applied
The material commonly used for machine tool bodies is
A feather key is generally
In a sawn nut, a slot is cut about half way through the nut and a small screw is tightened between the nut and the bolt in order to produce more friction.
The maximum bending stress in a curved beam having symmetrical section always occur at the
Which of the following statement is correct regarding power screws?
In case of thick cylinders, the tangential stress across the thickness of cylinder is
The washer is generally specified by its
For longitudinal joint in boilers, the type of joint used is
A fast and loose pulley drive is used when
A compound cylinder with inner radiusmm and outer radiusmm is made by shrinking one cylinder on to the other cylinder, The junction radius ismm and the junction pressure is 1.1 N/mm2. The maximum hoop stress developed in the inner cylinder is
A key made from a cylindrical disc having segmental cross-section, is known as
A tap bolt has
If the tearing efficiency of a riveted joint is 50%, then the ratio of diameter of rivet to the pitch is
In radial bearings, the load acts __________ to the axis of rotation.
A hollow shaft will transmit a __________ torque than a solid shaft of the same mass and same material.
If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as
In helical gears, the distance between similar faces of adjacent teeth along a helix on the pitch cylinders normal to the teeth, is called
The taper on key is given on
Which of the following statement is wrong for a connecting rod ?
A bolt has
When percentage of carbon in steel is increased, the ductility of steel decreases.
A cotter joint is used to transmit
Which of the following screw thread is adopted for power transmission in either direction?
A connecting rod subjected to an axial load may buckle in the plane of motion of the connecting rod.
The helix angle for double helical gears may be made up to
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
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is
When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be
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