Explore topic-wise MCQs in Machine Design.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Design knowledge and support exam preparation. Choose a topic below to get started.

1.

For a hydrostatic thrust bearing,Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm,film thickness=0.15mm,viscosity of lubricant=160SUS and specific gravity=0.86.

A. nCalculate power loss in pumping.
B. 2.68kW
C. 3.35kW
D. 2.6kW
E. 4.2kW
Answer» D. 2.6kW
Discussion
2.

For a hydrostatic thrust bearing,Thrust load=450kN, shaft speed=730rpm, shaft diameter=450mm, recess diameter=310mm, film thickness=0.15mm, viscosity of lubricant=160SUS and specific gravity=0.86.

A. nCalculate supply pressure
B. 10.2Pa
C. 4.01Pa
D. 4.01Mpa
E. 10.2Mpa
Answer» D. 4.01Mpa
Discussion
3.

In hydrodynamic lubrication, film thickness remains unaffected by change in speeds.

A. True
B. Increase with increase in speed
C. Decrease with increase in speed
D. Disappear as the speed tends to infinty
Answer» C. Decrease with increase in speed
Discussion
4.

Which of the following are not true for petroff s equation?

A. Shaft is considered concentric with the bearing
B. Bearing is subjected to light load
C. Is used to find coefficient of friction
D. Frictional torque is given by fpr l
Answer» E.
Discussion
5.

Viscosity is defined as the external resistance offered by a fluid to change its shape or relative motion of its parts.

A. Yes
B. It is internal resisting force
C. It is not offered but exerted on the fluids
D. None of the listed
Answer» C. It is not offered but exerted on the fluids
Discussion