Explore topic-wise MCQs in Powder Metallurgy.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Powder Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.

The running temperature of the oil affects the ______

A. bearing performance
B. bearing life and performance
C. bearing life
D. bearing dimensions
Answer» C. bearing life
Discussion
2.

The temperature of oil should not be _______ than the proper running temperature.

A. lower
B. higher
C. equal
D. very low
Answer» C. equal
Discussion
3.

Which of the following factors determine the rate of circulation of oil in oil-impregnated bearings?

A. Permeability of the porous bearing
B. Viscosity of the oil
C. Temperature
D. Permeability of the porous bearing, and viscosity of the oil
Answer» E.
Discussion
4.

The loss of oil occurs from the _____ in a cylindrical bearing.

A. top
B. cylindrical surface
C. ends
D. bottom
Answer» D. bottom
Discussion
5.

Which of the following conditions are necessary for the development of fluid film in porous bearings?

A. Viscosity
B. High speed
C. Low speed
D. High speed and viscosity
Answer» E.
Discussion
6.

The life of aluminum bearings is ________

A. 35 hours
B. > 200 hours
C. 7 hours
D. < 160 hours
Answer» C. 7 hours
Discussion
7.

________ bearing is used where soft journal is employed.

A. Brass bearings
B. Aluminum bearing
C. Lead bronze
D. Straight tin bronze
Answer» D. Straight tin bronze
Discussion
8.

Which of the following is an alternative to the immersion technique for impregnation of porous bearings?

A. Reducing impregnation
B. Grease impregnation
C. Oxidizing impregnation
D. Vacuum impregnation
Answer» E.
Discussion
9.

Oil impregnation of porous bearings is done for _____ minutes.

A. 80
B. 50
C. 30
D. 70
Answer» D. 70
Discussion
10.

Resin impregnation of porous bearings makes them _________

A. heat-treatable
B. non-heat treatable
C. reduces density
D. weak
Answer» C. reduces density
Discussion