Applied Mechanics and Graphic Statics MCQ

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Q1. A load of 500 kg was lifted through a distance of 13 cm. by an effort of 25 kg which moved through a distance of 650 cm. The mechanical advantage of the lifting machine is

(A) 15
(B) 18
(C) 20
(D) 26

Answer: (C) 20

Q2. If the angle between the applied force and the direction of motion of a body, is between 90° and 180°, the work done, is called

(A) Virtual work
(B) Imaginary work
(C) Zero work
(D) Negative work

Answer: (D) Negative work

Q3. Three forces which act on a rigid body to keep it in equilibrium. The forces must be coplanar and

(A) Concurrent
(B) Parallel
(C) Concurrent parallel
(D) None of these

Answer: (A) Concurrent

Q4. Pick up the incorrect statement from the following. In case of suspension bridge due to rise in temperature,

(A) Dip of the cable increases
(B) Length of the cable increases
(C) Dip of the cable decreases
(D) None of these

Answer: (C) Dip of the cable decreases

Q5. If the angle of projection is double the angle of inclination (α) of the plane on which particle is projected, the ratio of times of flight up the inclined plane and down the inclined plane, will be

(A) ½ cos α
(B) ½ sin α
(C) ½ tan α
(D) 2 cos α

Answer: (A) ½ cos α

Q6. Coefficient of friction depends on

(A) Nature of surfaces only
(B) Area of contact only
(C) Both (A) and (B)
(D) None of the above

Answer: (A) Nature of surfaces only

Q7. If ‘α’ is the angular acceleration of a compound pendulum whose angular displacement is ‘θ’, the frequency of the motion is

(A) 2π √(α/θ)
(B) (1/2π) √(α/θ)
(C) 4π √(α/θ)
(D) 2π √(α – θ)

Answer: (B) (1/2π) √(α/θ)

Q8. In simple harmonic motion, acceleration of a particle is proportional to

(A) Rate of change of velocity
(B) Displacement
(C) Velocity
(D) Direction

Answer: (B) Displacement

Q9. The intrinsic equation of catenary is

(A) S = c tan ψ
(B) y = c cosh x/c
(C) y = c cosh ψ
(D) y = c sinh ψ

Answer: (A) S = c tan ψ

Q10. The acceleration of a train starting from rest at any instant is 1/6(V + 1) m/sec² where ‘V’ is the velocity of the train in m/sec. The train will attain a velocity of 36 km/hour after travelling a distance of

(A) 2000 m
(B) 2100 m
(C) 2200 m
(D) 2300 m

Answer: (D) 2300 m

Q11. When a body falls freely under gravitational force, it possesses

(A) Maximum weight
(B) Minimum weight
(C) No weight
(D) No effect on its weight

Answer: (C) No weight

Q12. If a particle is projected inside a horizontal tunnel which is 554 cm high with a velocity of 60 m per sec, the angle of projection for maximum range, is

(A) 8°
(B) 9°
(C) 10°
(D) 11°

Answer: (C) 10°

Q13. A satellite goes on moving along its orbit round the earth due to

(A) Gravitational force
(B) Centrifugal force
(C) Centripetal force
(D) None of these

Answer: (B) Centrifugal force

Q14. In a simple screw jack, the pitch of the screw is 9 mm and length of the handle operating the screw is 45 cm. The velocity ratio of the system is

(A) 1.5
(B) 5
(C) 25
(D) 314

Answer: (D) 314

Q15. What is the answer to this question?
Applied Mechanics and Graphic Statics

(A) 10.8 t
(B) 10.6 t
(C) 10.4 t
(D) 10.2 t

Answer: (A) 10.8 t