MCQ Tests on Theory of Machines - Set 28 - ObjectiveBooks
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# Practice Test: Question Set - 28

1. When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
(A) Tension in the tight side of the belt
(B) Tension in the slack side of the belt
(C) Sum of the tensions on the tight side and slack side of the belt
(D) Average tension of the tight side and slack side of the belt

2. Typewriter constitutes
(A) Machine
(B) Structure
(C) Mechanism
(D) Inversion

3. A mechanism consisting of four links is called a __________ mechanism.
(A) Simple
(B) Compound
(C) Binary
(D) None of these

4. The Klein's diagram is used when
(A) Crank has uniform angular velocity
(B) Crank has nonuniform angular velocity
(C) Crank has uniform angular acceleration
(D) Crank has nonuniform angular acceleration

5. Which of the following statement is correct as regard to the difference between a machine and a structure?
(A) The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
(B) The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
(C) A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
(D) All of the above

6. A pantograph is a mechanism with
(A) Lower pairs
(B) Higher pairs
(C) Rolling pairs
(D) Turning pairs

7. A rigid body possesses ________degrees of freedom
(A) One
(B) Two
(C) Four
(D) Six

8. When the particles of a body moves perpendicular to its axis, then the body is said to have
(A) Longitudinal vibration
(B) Transverse vibration
(C) Torsional vibration
(D) None of these

9. Which type of gear train is used in clock mechanism to join hour hand and minute hand?
(A) Simple gear train
(B) Compound gear train
(C) Reverted gear train
(D) Epicyclic gear train

10. The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is
(A) 9/8
(B) 9/82
(C) 9/16
(D) 9/128

11. The flank of the tooth is the surface of the tooth __________ the pitch surface.
(A) Above
(B) Below
(C) At
(D) None of these

12. When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a
(A) Screw pair
(B) Spherical pair
(C) Turning pair
(D) Sliding pair

13. The frequency of oscillation of a torsional pendulum is
(A) 2πk/r. √(g/l)
(B) r/2πk. √(l/g)
(C) 2πr/k. √(g/l)
(D) r/2πk. √(g/l)

14. The velocity of sliding of meshing gear teeth is
(Where ω₁ and ω₂ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)
(A) (ω₁ + ω₂) y
(B) (ω₁/ω₂) y
(C) (ω₁ × ω₂) y
(D) (ω₁ + ω₂)/y

15. The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the
(A) Pitch circle
(B) Base circle
(C) Pitch curve
(D) Prime circle

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