Civil Mechanic Interview Questions and Answers - Set 08 - ObjectiveBooks
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# Practice Test: Question Set - 08

1. Forces are called concurrent when their lines of action meet in
(A) One point
(B) Two points
(C) Plane
(D) Perpendicular planes

2. The ratio of the maximum deflections of a beam simply supported at its ends with an isolated central load and that of with a uniformly distributed load over its entire length, is
(A) 3/2
(B) 15/24
(C) 24/15
(D) 2/3

3. At either end of a plane frame, maximum number of possible bending moments, are
(A) Zero
(B) One
(C) Two
(D) Three

4. Which of the following is not the unit of work, energy and heat?
(A) kcal
(B) kg m
(C) kWhr
(D) hp

5. If a shaft is rotating N revolutions per minute with an applied torque T kg-m, the horse power being transmitted by the shaft, is
(A) 2πNT/550
(B) 2πNT/750
(C) 2πNT/4500
(D) 2πNT/55

6. In a shaft shear stress intensity at a point is not
(A) Directly proportional to the distance from the axis
(B) Inversely proportional to the distance from the axis
(C) Inversely proportional to the polar moment of inertia
(D) Directly proportional to the applied torque

7. Center of gravity of a solid cone lies on the axis at the height
(A) One-fourth of the total height above base
(B) One-third of the total height above base
(C) One-half of the total height above base
(D) Three-eighth of the total height above the base

8. The force in DB of the truss shown in below figure is
(A) √3 W compression
(B) √W tension
(C) 2 W compression
(D) 5 W tension

9. A diagram which shows the variations of the axial load for all sections of the span of a beam, is called
(A) Bending moment diagram
(B) Shear force diagram
(C) Thrust diagram
(D) Stress diagram

10. The resultant of the following three couples 20 kg force, 0.5 m arm, +ve sense 30 kg force, 1 m arm, -ve sense 40 kg force, 0.25 m arm, +ve sense having arm of 0.5 m will be
(A) 20 kg, -ve sense
(B) 20 kg, +ve sense
(C) 10 kg, +ve sense
(D) 10 kg, -ve sense

11. A cantilever beam rectangular in cross-section is subjected to an isolated load at its free end. If the width of the beam is doubled, the deflection of the free end will be changed in the ratio of
(A) 8
(B) 1/8
(C) 1/2
(D) 3

12. In rectangular columns (cross-section b × h), the core is a
(A) Rectangle of lengths b/2 and h/2
(B) Square of length b/2
(C) Rhombus of length h/2
(D) Rhombus of diagonals b/3 and h/3

13. Pick up the correct assumption of the theory of simple bending
(A) The value of the Young's modulus is the same in tension as well as in compression
(B) Transverse section of a beam remains plane before and after bending
(C) The material of the beam is homogeneous and isotropic
(D) All the above

14. Dynamic friction as compared to static friction is
(A) Same
(B) More
(C) Less
(D) May be less of more depending on nature of surfaces and velocity

15. The property of a material by which it can be beaten or rolled into thin plates, is called
(A) Malleability
(B) Ductility
(C) Plasticity
(D) Elasticity

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