Which of the following is the example of lever of first order__________________?
(A) arm of man
(B) pair of scissors
(C) pair of clinical tongs
(D) all of the above
(D) none of the above
A cable with a uniformly distributed load per horizontal metre run will take the following shape_________________?
(A) straight line
(B) parabola
(C) hyperbola
(D) elliptical
(D) part of a circle
In actual machines_____________________?
(A) mechanical advantage is greater than velocity ratio
(B) mechanical advantage is equal to velocity ratio
(C) mechanical advantage is less than velocity ratio
(D) mechanical advantage is unity
(D) none of the above
A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?
(A) 38 m
(B) 62.5 m
(C) 96 m
(D) 124 m
(D) 240 m
The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of __________________?
(A) friction
(B) limiting friction
(C) repose
(D) kinematic friction
(D) static friction
The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?
(A) same
(B) double
(C) half
(D) four times
(D) one fourth
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
(D) maximum power it can transmit at highest possible-speed
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
(D) none of the above
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
(D) none of the above
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°
(D) 90°.