SECTION-1

#### Theory of Machine objective type questions/Multiple choice questions

Q11. 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

Ans: (d) all of the above

Q12. 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

Ans: (a) screw pair

Q13. The lead screw of a lathe with nut forms a

(a) rolling pair

(b) sliding pair

(c) screw pair

(d) turning pair

Ans: (c) screw pair

Q14. When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the Other, the pair formed is known as a

(a) lower pair

(b) higher pair

(c) self-closed pair

(d) force-closed pair

Ans: (a) lower pair

Q15. Which of the following is a higher pair?

(a) Belt and pulley

(b) Turning pair

(c) Screw pair

(d) Sliding pair

Ans: (a) Belt and pulley

Q16. The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is

(a) I=2p-2

(b) I=2p-3

(c) I=2p-4

(d) I=2p-5

Ans: (c) I=2p-4

Q17. 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

Ans: (d) all of the above

Q18. The mechanism in which two are turning pairs and two are sliding pairs, is called a

(a) double slider crank chain

(b) elliptical trammel

(c) Scotch yoke mechanism

(d) all of these

Ans: (d) all of these

Q19. The mechanism consisting of three turning pairs and one sliding pair, is called a

(a) single slider crank chain

(b) Whitworth quick return motion mechanism

(c) crank and slotted lever quick return motion mechanism

(d) all of the above

Ans: (d) all of the above

Q20. Scotch yoke mechanism is used to generate

(a) sine functions

(b) square roots

(c) logarithms

(d) inversions                                    [ps2id id=’002′ target=”/]

Ans: (a) sine functions

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##### Read More Sections of Theory of Machine Objective Questions

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Theory of Machine MCQ – Section-1

Theory of Machine MCQ – Section-2

Theory of Machine MCQ – Section-3

Theory of Machine MCQ – Section-4

Theory of Machine MCQ – Section-5

Theory of Machine MCQ – Section-6

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