A. 25
B. 50
C. 100
D. 250
E. 500
0
If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
0
The necessary condition for forces to be in equilibrium is that these should be_______________?
A. j-2
B.2j-l
C. 2/-3
D.3/-2
E. 2/ -4
0
The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?
A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else
0
A single force and a couple acting in the same plane upon a rigid body________________?
A. limiting friction
B. sliding friction
C. rolling friction
D. kinematic friction
E. dynamic friction
0
A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of__________________?
A. balance each other
B. cannot balance each other
C. produce moment of a couple
D. are equivalent
E. none of the above
0
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. r/2
B. r/A
C. r/%
D. 0.134 r
E. 3r/8
0
Tangent of angle of friction is equal to_________________?
A. Wtan(a + )
B. Wtan(a-)
C. Wcos(a + )
D. Wsin(a + )
E. W (sin a + cos )
0
Coulomb friction is the friction between_________________?
A. kinetic friction
B. limiting friction
C. angle of repose
D. coefficient of friction
E. friction force
0
A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is_________________?
A. bodies having relative motion
B. two dry surfaces
C. two lubricated surfaces
D. solids and liquids
E. electrically charged particles
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