Theory of Machines Free Test - Set 26 - ObjectiveBooks
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# Practice Test: Question Set - 26

1. Which of the following statement is correct?
(A) The power absorbed in operating the piston valve is less than D-slide valve.
(B) The wear of the piston valve is less than the wear of the D-slide valve.
(C) The D-slide valve is also called outside admission valve.
(D) All of the above

2. The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)
(A) l₁ = kG
(B) l₂ = kG
(C) l₁l₂ = kG
(D) l₁l₂ = kG²

3. The tendency of a body to resist change from rest or motion is known as
(A) Mass
(B) Friction
(C) Inertia
(D) Resisting force

4. The example of rolling pair is
(A) Bolt and nut
(B) Lead screw of a lathe
(C) Ball and socket joint
(D) Ball bearing and roller bearing

5. For low and moderate speed engines, the cam follower should move with
(A) Uniform velocity
(B) Simple harmonic motion
(C) Uniform acceleration and retardation
(D) Cycloidal motion

6. The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
(A) cosθ = sinα
(B) sinθ = ± tanα
(C) tanθ = ± cosα
(D) cotθ = cosα

7. In a locomotive, the resultant unbalanced force due to the two cylinders along the line of stroke, is known as
(A) Tractive force
(B) Swaying couple
(C) Hammer blow
(D) None of these

8. The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.
(A) One-third
(B) Two-third
(C) Double
(D) Three times

9. In order to give a complete secondary balance of a multi-cylinder inline engine,
(A) The algebraic sum of the secondary forces must be equal to zero
(B) The algebraic sum of the couples about any point in the plane of the secondary forces must be equal to zero
(C) Both (A) and (B)
(D) None of these

10. A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
(A) Equal to
(B) Less than
(C) Greater than
(D) None of these

11. A shaft carrying three rotors will have
(A) No node
(B) One node
(C) Two nodes
(D) Three nodes

12. When a ship travels in a sea, which of the effect is more dangerous
(A) Steering
(B) Pitching
(C) Rolling
(D) All of the above

13. Peaucellier’s mechanism has

14. The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)
(A) ω × AB
(B) ω × (AB)²
(C) ω² × AB
(D) × AB)²

15. The periodic time is given by (where ω = Angular velocity of the particle in rad/s)
(A) ω/2π
(B) 2π/ω
(C) ω ×
(D) π/ω

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