Mechanical Engineering MCQ’s

1. A universal joint is an example of
(A) higher pair
(B) lower pair
(C) rolling pair
(D) sliding pair

2. What is the function of cone pulley drive in lathe machines?
(A) Drive the lead screw
(B) Change the spindle speed
(C) Drive the tail-stock
(D) All of the above

3. Guest’s theory of failure is applicable for following type of materials
(A) ductile
(B) elastic
(C) plastic
(D) tough.

4. Pulley in a belt drive acts as
(A) cylindrical pair
(B) turning pair
(C) rolling pair
(D) sliding pair

5. Which of the following is a power transmitting element?
(A) Nuts and bolts
(B) Sprockets and chains
(C) Axles
(D) All of the above

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

7. Casting of a centrifugal pump is designed so as to minimize
(A) friction loss
(B) starting time.
(C) static head
(D) loss of kinetic energy

8. The Scott-Russell mechanism consists of sliding and turning pairs
(A) sliding and rotary pairs
(B) turning and rotary pairs
(C) sliding pairs only
(D) turning pairs only.

9. Which of the following is a machine shaft?
(A) Line shaft
(B) Counter shaft
(C) Crankshaft
(D) All of the above

10. What is the percentage of carbon in plain carbon steel?
(A) 60 to 80%
(B) Less than 1.7%
(C) Less than 7%
(D) None of the above