Practice Test on Theory of Machines - Set 19

Practice Test: Question Set - 19


1. A mechanism is an assemblage of
    (A) Two links
    (B) Three links
    (C) Four or more than four links
    (D) All of these

2. The ratio of the driving tensions for V-belts is __________ times that of flat belts.
(Where β = Semi-angle of the groove)
    (A) sinβ
    (B) cosβ
    (C) cosecβ
    (D) secβ

3. A reed type tachometer use the principle of
    (A) Longitudinal vibration
    (B) Torsional vibration
    (C) Transverse vibration
    (D) Damped free vibration

4. A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The radial component of the acceleration of B with respect to A, is (where vBA = Linear velocity of B with respect to A)
    (A) vBA × AB
    (B) vBA /AB
    (C) BA
    (D) BA /AB

5. The example of completely constrained motion is a
    (A) Motion of a piston in the cylinder of a steam engine
    (B) Motion of a square bar in a square hole
    (C) Motion of a shaft with collars at each end in a circular hole
    (D) All of the above

6. The locus of a point on a thread unwound from a cylinder will be
    (A) A straight line
    (B) A circle
    (C) Involute
    (D) Cycloidal

7. In its simplest form, a cam mechanism consists of following number of links
    (A) 1
    (B) 2
    (C) 3
    (D) 4

8. The number of links and instantaneous centers in a reciprocating engine mechanism are
    (A) 4, 4
    (B) 4, 5
    (C) 5, 4
    (D) 4, 6

9. The Coriolis component of acceleration is taken into account for
    (A) Slider crank mechanism
    (B) Four bar chain mechanism
    (C) Quick return motion mechanism
    (D) All of these

10. Which of the following is a pendulum type governor?
    (A) Watt governor
    (B) Porter governor
    (C) Hartnell governor
    (D) None of these

11. The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is
    (A) (1/2). μ W cosecα (r₁ + r₂)
    (B) (2/3). μ W cosecα (r₁ + r₂)
    (C) (1/2). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]
    (D) (2/3). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]

12. The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)
    (A) c (m - M) g
    (B) c (m + M) g
    (C) c/(m + M) g
    (D) c/(m - M) g

13. When a point moves along a straight line, its acceleration will have
    (A) Radial component only
    (B) Tangential component only
    (C) Coriolis component only
    (D) Radial and tangential components both

14. If two moving elements have surface contact in motion, such pair is known as
    (A) Sliding pair
    (B) Rolling pair
    (C) Surface pair
    (D) Higher pair

15. If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to
    (A) D₁/D₂
    (B) D₂/D₁
    (C) D₁.D₂
    (D) D₁

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Theory of Machines:
  Set 01      Set 02      Set 03      Set 04      Set 05      Set 06      Set 07      Set 08      Set 09
  Set 10      Set 11      Set 12      Set 13      Set 14      Set 15      Set 16      Set 17      Set 18
  Set 19      Set 20      Set 21      Set 22      Set 23      Set 24      Set 25      Set 26      Set 27
  Set 28      Set 29      Set 30      Set 31      Set 32      Set 33      Set 34      Set 35      Set 36
  Set 37      Set 38
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