Longitudinal stress in a thin cylinder is__________________?

A. Equal to the hoop stress
B. Twice the hoop stress
C. Half of the hoop stress
D. One-fourth of hoop stress

The torsional rigidity of a shaft is expressed by the_______________?

A. Maximum torque it can transmit
B. Number of cycles it undergoes before failure
C. Elastic limit up to which it resists torsion, shear and bending stresses
D. Torque required to produce a twist of one radian per unit length of shaft

A key is subjected to side pressure as well at shearing forces. These pressures are called_________________?

A. Bearing stresses
B. Fatigue stresses
C. Crushing stresses
D. Resultant stresses

Shear stress induced in a shaft subjected to tension will be__________________?

A. maximum at periphery and zero at center
B. maximum at center
C. uniform throughout
D. average value in center

A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is__________________?

A. 0°
B. 30°
C. 45°
D. 60°

Coulomb friction is the friction between_____________________?

A. Bodies having relative motion
B. Two dry surfaces
C. Two lubricated surfaces
D. Solids and liquids

The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to__________________?

A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )

A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of___________________?

A. R/2
B. R/a
C. R/%
D. 0.134 r

A single force and a couple acting in the same plane upon a rigid body_________________?

A. Balance each other
B. Cannot balance each other
C. Produce moment of a couple
D. Are equivalent

The maximum frictional force which comes into play when a body just begins to slide over another surface is called________________?

A. Limiting friction
B. Sliding friction
C. Rolling friction
D. Kinematic friction