Machine Kinematics Questions and Answers – Mechanisms with Lower Pairs

This set of Machine Kinematics Multiple Choice Questions & Answers (MCQs) focuses on ” Mechanisms with Lower Pairs”.

1. A pantograph consists of
a) 4 links
b) 6 links
c) 8 links
d) 10 links
View Answer

Answer: a
Explanation: In a pantograph, all the pairs are turning pairs. It has 4 links.

2. Which of these mechanisms gives an approximately straight line?
a) hart
b) watt
c) peaucellier
d) tchebicheff
View Answer

Answer: b
Explanation: Watt’s mechanism is a crossed four bar chain mechanism and was used by Watt for his early steam engines to guide the piston rod in a cylinder to have an approximate straight line motion.

3. Which of these mechanism has six links?
a) tchebicheff
b) hart
c) peaucellier
d) watt
View Answer

Answer: b
Explanation: Hart’s mechanism requires only six links as compared with the eight links required by the Peaucellier mechanism.
advertisement
advertisement

4. Which of these mechanisms use two identical mechanisms?
a) hart
b) watt
c) peaucellier
d) none of the mentioned
View Answer

Answer: d
Explanation: None.

5. The Davis steering gear is not used because
a) it has turning pairs
b) it is costly
c) it has sliding pair
d) it does not fulfil the condition of correct gearing
View Answer

Answer: b
Explanation: Though the gear is theoretically correct, but due to the presence of more sliding members, the wear will be increased which produces slackness between the sliding surfaces, thus eliminating the original accuracy. Hence Davis steering gear is not in common use.
Sanfoundry Certification Contest of the Month is Live. 100+ Subjects. Participate Now!

6. The Davis steering gear fulfils the condition of correct steering at
a) two positions
b) three positions
c) all positions
d) one positions
View Answer

Answer: c
Explanation: It can be used in all positions.
Ackermann steering gear fulfils the condition of correct steering at only three positions.

7. The Ackermann steering gear fulfils the condition of correct steering at
a) no position
b) one position
c) three positions
d) all positions
View Answer

Answer: c
Explanation: Ackermann steering gear fulfils the condition of correct steering at only three positions.
advertisement

8. A Hooke’s joint is used to join two shafts which are
a) aligned
b) intersecting
c) parallel
d) none of the mentioned
View Answer

Answer: b
Explanation: Hooke’s joint is used to connect two shafts, which are intersecting at a small angle.

9. The maximum velocity of the driven shaft of a Hooke’s joint is
a) ω1 cosα
b) ω1/cosα
c) ω1 sinα
d) ω1/sinα
View Answer

Answer: b
Explanation: Maximum speed of the driven shaft,
ω1(max) = ωcosα/ 1 – sin2α = ωcosα/cos2α = ω/cosα.
advertisement

10. The maximum velocity of the driven shaft of a Hooke’s joint is at ϴ equal to
a) 00 and 1800
b) 900 and 2700
c) 900 and 1800
d) 1800 and 2700
View Answer

Answer: a
Explanation: Maximum velocity is determined at 00 ,1800 and 3600.

Sanfoundry Global Education & Learning Series – Machine Kinematics.
To practice all areas of Machine Kinematics, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

advertisement
advertisement
Subscribe to our Newsletters (Subject-wise). Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

Youtube | Telegram | LinkedIn | Instagram | Facebook | Twitter | Pinterest
Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

Subscribe to his free Masterclasses at Youtube & discussions at Telegram SanfoundryClasses.