# Online Quiz Test Applied Mechanics and Graphic Statics – Set 22

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## Q1. Power developed by a torque, is

(A) 2πNT kg m/min
(B) 2πNT/4500 h.p
(C) 2πNT /60 watts
(D) All the above

## Q2. M.I. of a thin ring (external diameter D, internal diameter d) about an axis perpendicular to the plane of the ring, is

(A) π/64 (D4 + d4)
(B) π/32 (D4 – d4)
(C) π/32 (D4 + d4)
(D) π/32 (D4 × d4)

Answer: (B) π/32 (D4 – d4)

## Q3. Angular acceleration of a particle may be expressed as

(B) Degrees/sec2
(C) Revolutions/sec
(D) All the above

(A) 98 m
(B) 490 m
(C) 980 m
(D) 1960 m

## Q5. A rigid body suspended vertically at a point and oscillating with a small amplitude under the action of the force of gravity, is called

(A) Simple pendulum
(B) Compound pendulum
(C) Second’s pendulum
(D) None of these

## Q6. The tension in a cable supporting a lift

(A) Is more when the lift is moving downwards
(B) Is less when the lift is moving upwards
(C) Remains constant whether its moves downwards or upwards
(D) Is less when the lift is moving downwards

Answer: (D) Is less when the lift is moving downwards

## Q7. Centre of gravity of a thin hollow cone lies on the axis of symmetry at a height of

(A) One-half of the total height above base
(B) One-third of the total height above base
(C) One-fourth of the total height above base
(D) None of these

Answer: (B) One-third of the total height above base

## Q8. The maximum frictional force which comes into play, when a body just begins to slide over the surface of a another body, is known

(A) Sliding friction
(B) Rolling friction
(C) Limiting friction
(D) None of these

(A) 1 t
(B) 2 t
(C) 3 t
(D) 3.5 t

## Q10. The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

(A) Algebraic sum of the resolved parts of the forces in the direction
(B) Arithmetical sum of the resolved parts of the forces in the direction
(C) Difference of the forces multiplied by cosine θ°
(D) Sum of the forces multiplied by the tangent θ°

Answer: (A) Algebraic sum of the resolved parts of the forces in the direction

## Q11. If the resultant of two forces ‘P’ and ‘Q’ acting at an angle ‘θ’ makes an angle ‘α’ with ‘P’, then tan α equals

(A) P sin θ/P – Q cos θ
(B) Q sin θ/P + Q cos θ
(C) P sin θ/P + Q tan θ
(D) Q sin θ/P + Q sin θ

Answer: (B) Q sin θ/P + Q cos θ

(A) Parabolic
(B) Circular
(C) Catenary
(D) Elliptical

(A) 2/3
(B) 1/5
(C) 3/5
(D) 1/3

## Q14. For maximum range of a projectile, the angle of projection should be

(A) 30°
(B) 45°
(C) 60°
(D) None of these

## Q15. For maximum range of a projectile, the angle of projection should be

(A) 30°
(B) 45°
(C) 60°
(D) None of these