Basic Mechanical Engineering Test - Set 1

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)   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!


3)   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!


4)   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!


5)   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!


6)   Which flat belt drive system has two pulleys mounted on driven shaft and one pulley on driving shaft?

a. Multiple belt drive
b. Cone pulley drive
c. Fast and loose pulley drive
d. None of the above
Answer  Explanation 

ANSWER: Fast and loose pulley drive

Explanation:
No explanation is available for this question!


7)   Which of the following statements are false for belt drives? 1. Belt drive is used in applications having constant speed drive 2. Belt drives can be used at extremely high speeds 3. Belt drives have low power transmitting capacity 4. Belt drives need continuous lubrication

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

ANSWER: 1, 2 and 4

Explanation:
No explanation is available for this question!


8)   Determine power rating of an electric motor if it runs at 1440 r.p.m and line shaft transmits torque of 75 Nm. Assume Reduction ratio = 1.6

a. 10.36 kW
b. 11.3 kW
c. 7.068 kW
d. 9.12 kW
Answer  Explanation 

ANSWER: 7.068 kW

Explanation:
No explanation is available for this question!


9)   In simple gear trains the direction of rotation of driven gear is opposite to the direction of rotation of driving gear only if______

a. even number of idler gears are present
b. odd number of idler gears are present
Answer  Explanation 

ANSWER: even number of idler gears are present

Explanation:
No explanation is available for this question!


10)   Why is an idler gear used in gear trains?

a. To obtain minimum centre distance between driving and driven shaft
b. To have required direction of rotation
c. Both a. and b.
d. None of the above
Answer  Explanation 

ANSWER: To have required direction of rotation

Explanation:
No explanation is available for this question!