# Applied Mechanics and Graphic Statics MCQ Practice – Set 06

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(A) a/4
(B) 3a/4
(C) 3b/10
(D) 3a/10

(A) 40 kg
(B) 60 kg
(C) 10 kg
(D) 100 kg

## Q3. For a self-locking machine, the efficiency should be

(A) Less than 60%
(B) 50%
(C) More than 50%
(D) None of these

## Q4. The bending moment in an arch is proportional to

(A) Vertical ordinate of funicular polygon
(B) Vertical ordinate of the arch
(C) Intercept between the arch axis and the funicular polygon
(D) None of these

Answer: (C) Intercept between the arch axis and the funicular polygon

(A) 30°
(B) 45°
(C) 60°
(D) 90°

(A) h/2
(B) h/3
(C) h/4
(D) h/5

## Q7. The centre of gravity of a trapezoidal dam section whose top width is a, bottom width is band the vertical side is a, from its vertical face is

(A) (a² + ab + b²)/3 (a + b)
(B) (b² + bc + c²)/3 (b + c)
(C) (a² + ab + c²)/3 (a + c)
(D) None of these

Answer: (A) (a² + ab + b²)/3 (a + b)

(A) 1/2
(B) 3/2
(C) 2
(D) 3

## Q9. The resultant of two forces acting at right angles is √34 kg and acting at 60° is 70 kg. The forces are

(A) 1 kg and 4 kg
(B) 2 kg and 3 kg
(C) √3 kg and √5 kg
(D) 3 kg and 5 kg

Answer: (D) 3 kg and 5 kg

(A) Work
(B) Force
(C) Power
(D) Torque

## Q11. The phenomenon of collision of two elastic bodies takes place because bodies

(A) Immediately after collision come momentarily to rest
(B) Tend to compress each other till they are compressed maximum possible
(C) Attempt to regain its original shape due to their elasticities
(D) All the above

## Q12. A body is dropped from a height of 100 m and at the same time another body is projected vertically upward with a velocity of 10 m/sec. The two particles will

(A) Never meet
(B) Meet after 1 sec
(C) Meet after 5 sec
(D) Meet after 10 sec

Answer: (D) Meet after 10 sec

(A) 2
(B) 3
(C) 4
(D) 5

(A) m
(B) m2
(C) m3
(D) m4

## Q15. In the structure shown in below figure, the member which carries zero force, is

(A) AB
(B) BC
(C) BE
(D) All the above