Theory of Machines objective questions with answers part3

Q1. In multi-V-belt transmission, if one of the belt is broken, we have to change the
(A) broken belt
(B) broken belt and its adjacent belts
(C) all the belts
(D) there is no need of changing any one as remaining belts can take care of transmission of load

Q2. Idler pulley is used
(A) for changing the direction of motion of the belt
(B) for applying tension
(C) for increasing -velocity ratio
(D) All of these

Q3. Crowning on pulleys helps
(A) in increasing velocity ratio
(B) in decreasing the slip of the belt
(C) for automatic adjustment of belt position so that belt runs centrally
(D) increase belt and pulley life

Q4. For fluctuating loads, welsuited bearing is
(A) ball bearing
(B) roller bearing
(C) needle roller bearing
(D) thrust bearing

Q5. Governor is used in automobile to
(A) decrease the variation of speed
(B) to control
(C) to control SN
(D) All of these

Q6. In an ideal machine, the output as compared to input is
(A) less
(B) more
(C) equal
(D) may be less or more depending on efficiency

Q7. When a ship travels in a sea, which of the effect is more dangerous
(A) steering
(B) pitching
(C) rolling
(D) All of these

Q8. Transmission of power from the engine to the rear axle of an automobile is by means of
(A) compound gears
(B) worm and wheel method
(C) Hooke’s joint
(D) crown gear

Q9. The Ackermann steering mechanism is preferred to the Davis type in automobiles because
(A) the former is mathematically accurate
(B) the former is having turning pair
(C) the former is most economical
(D) the former is most rigid

Q10. The indicator using Watt mechanism is known as
(A) Thompson indicator
(B) Richard indicator
(C) Simplex indicator
(D) Thomson indicator

Q11. In automobiles the power is transmitted from gear box to differential through
(A) bevel gear
(B) universal joint
(C) Hooke’s joint
(D) Knuckle joint

Q12. elliptical trammels
(A) all four pairs are turning
(B) three pairs turning and one pair sliding
(C) two pairs turning and two pairs sliding
(D) one pair turning and three pairs sliding

Q13. The e.g. of a link in any mechanism would experience
(A) no acceleration
(B) linear acceleration
(C) angular acceleration
(D) both angular and linear accelerations

Q14. It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by
(A) universal joint
(B) knuckle joint
(C) Oldham’s coupling
(D) flexible coupling

Q15. The Klein’s method of construction for reciprocating engine mechanism
(A) is based on acceleration diagram
(B) is a simplified form of instantaneous center method
(C) utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine
(D) enables determination of Corioli’s component

Q16. The Hooke’s joint consists of :
(A) two forks
(B) one fork
(C) three forks
(D) four forks

Q17. With single Hooke’s joint it is possible to connect two shafts, the axes of which have an angular misalignment up to
(A) 10°
(B) 20°
(C) 30°
(D) 40°

Q18. Flexible coupling is used because
(A) it is easy to disassemble
(B) it is easy to engage and disengage
(C) it transmits shocks gradually
(D) it prevents shock transmission and eliminates stress reversals

Q19. The advantage of the piston valve over D-slide valve is that in the former case
(A) wear is less
(B) power absorbed is less
(C) both wear and power absorbed are low
(D) the pressure developed being high provides tight sealing

Q20. The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is
(A) flexible coupling
(B) universal coupling
(C) chain coupling
(D) Oldham’s coupling