Mechanical Engineering MCQs

2075 MCQs  (Page 66 of 208)

Attempt Mechanical Engineering Mcqs Quiz
The C.G. of a solid hemisphere lies on the central radius 3r_________________?
A. At distance — from the plane base 3r
B. At distance — from the plane base 3r
C. At distance — from the plane base 3r
D. At distance — from the plane base or
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A flywheel on a motor goes from rest to 1000 rpm in 6 sec. The number of revolutions made is nearly equal to_________________?
A. 25
B. 50
C. 100
D. 250
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If n = number of members andy = number of joints, then for a perfect frame, n =________________?
A. J-2
B. 2j-l
C. 2/-3
C. 3/-2
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The necessary condition for forces to be in equilibrium is that these should be_____________________?
A. Coplanar
B. Meet at one point ;
C. Both a. and b. above
D. All be equal
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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
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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
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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
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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 + )
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Coulomb friction is the friction between_____________________?
A. Bodies having relative motion
B. Two dry surfaces
C. Two lubricated surfaces
D. Solids and liquids
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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°
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Word of the Day
28 Sep
Expatriate
a person who lives outside their native country.
ملک بدری، جلا وطن کرن، شہر بدر کرنا

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