Machine Elements - Mechanical Engineering (MCQ) questions and answers

1)   Which of the following is a power transmitting element?

a. Nuts and bolts
b. Sprockets and chains
c. Axles
d. All of the above
Answer  Explanation 

ANSWER: Sprockets and chains

Explanation:
No explanation is available for this question!


2)   Which of the following statements is/are true?

a. Axles are used to transmit power
b. Shafts and axles are rotating elements
c. Shafts transmit power while axles do not transmit power
d. All of the above
Answer  Explanation 

ANSWER: Shafts transmit power while axles do not transmit power

Explanation:
No explanation is available for this question!


3)   Machine elements such as bearings are _________

a. holding type elements
b. supporting type elements
c. power transmitting elements
d. all of the above
Answer  Explanation 

ANSWER: supporting type elements

Explanation:
No explanation is available for this question!


4)   The shaft directly connected to the power source is called as ______

a. line shaft
b. counter shaft
c. both a. and b.
d. none of the above
Answer  Explanation 

ANSWER: line shaft

Explanation:
No explanation is available for this question!


5)   Which of the following is a machine shaft?

a. Line shaft
b. Counter shaft
c. Crankshaft
d. All of the above
Answer  Explanation 

ANSWER: Crankshaft

Explanation:
No explanation is available for this question!


6)   Which type of bearings are known as anti friction bearings?

a. Sliding contact bearings
b. Rolling contact bearings
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: Rolling contact bearings

Explanation:
No explanation is available for this question!


7)   In roller bearings which type of rolling elements are used?

a. Cylindrical rollers
b. Taper rollers
c. Spherical rollers
d. All of the above
Answer  Explanation 

ANSWER: All of the above

Explanation:
No explanation is available for this question!


8)   Why is the load carrying capacity low in ball bearings?

1. Due to line contact between inner race and the ball
2. Due to greater axial dimensions
3. Due to less radial dimensions
4. Due to point contact between inner race and the ball


a. 1 and 3
b. only 1
c. only 4
d. 2 and 4
Answer  Explanation 

ANSWER: only 4

Explanation:
No explanation is available for this question!


9)   Cylindrical roller bearings have greater _____

a. axial load carrying capacity
b. thrust load carrying capacity
c. radial load carrying capacity
d. all of the above
Answer  Explanation 

ANSWER: radial load carrying capacity

Explanation:
No explanation is available for this question!


10)   Which of the following statements is/are true?

a. Jaw clutch is a positive clutch
b. The power transmitting capacity of a friction clutch is inversely proportional to the coefficient of friction between contacting surfaces
c. Driving and driven plates in friction clutches are held together due to radial force applied by the helical springs
d. All of the above
Answer  Explanation 

ANSWER: Jaw clutch is a positive clutch

Explanation:
No explanation is available for this question!