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# Model Questions for SSC Junior Engineer EXAM - Machanical Engg Set-1

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## Model Questions for SSC Junior Engineer EXAM - Machanical Engg Set-1

**1. Moment of inertia of a circular section about an axis perpendicular to
the section is**

A. pd4/64

B. pd3/16

C. pd3/32

D. pd4/32

**2. The unit of angular acceleration is**

A. m/s

B. m/s2

C. N-m

D. rad/s2

**3. The velocity ratio in case of an inclined plane inclined at angle ? to
the horizontal and weight being pulled up the inclined plane by vertical effort
is**

A. tan
q

B. cosec
q

C. cos
q

D. sin
q

**4. Moment of inertia of a triangular section of base (b) and parallel to
the base, is**

A. bh3/12

B. bh3/36

C. bh3/4

D. bh3/8

**5. A smooth cylinder lying on its convex surface remains in __________
equilibrium.**

A. unstable

B. neutral

C. stable

D. NON OF THESE

## Study Kit for SSC Junior Engineer EXAM (Paper-1) 2017-2018

**6. The range of projectile on a downward inclined plane is __________ the
range on upward inclined plane for the same velocity of projection and angle of
projection.**

A. equal to

B. less than

C. more than

D. None of these

**7. A body of weight W is required to move up on rough inclined plane whose
angle of inclination with the horizontal is ?. The effort applied parallel to
the plane is given by(where ? = tan? = Coefficient of friction between the plane
and the body.)**

A. P = W (sin
a
+ mcos
a)

B. P = W (cosa
+ msin
a)

C. P = W tan
a

D. P = W tan(a
+ f)

**8. Two balls of equal mass and of perfectly elastic material are lying on
the floor. One of the ball with velocity v is made to struck the second ball.
Both the balls after impact will move with a velocity**

A. v/4

B. v/8

C. v

D. v/2

**9. The friction experienced by a body, when in motion, is known as**

A. limiting friction

B. rolling friction

C. dynamic friction

D. static friction

**10. If the resultant of two equal forces has the same magnitude as either
of the forces, then the angle between the two forces is**

A. 90°

B. 120°

C. 60°

D. 30°