Explore topic-wise MCQs in Mechanical Metallurgy.

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

1.

The HRB scale of Rockwell hardness measurement range from _________

A. 0-100
B. 0-50
C. 20-70
D. 50-150
Answer» B. 0-50
2.

If the material is showing a hardness value of HRc 57, which of the following combination of load and indenter is used for the measurement?

A. Load-100 kg, indenter-diamond cone
B. Load-150 kg, indenter-diamond cone
C. Load-100 kg, indenter-1.6 mm diameter ball
D. Load-150 kg, indenter-1.6 mm diameter steel ball
Answer» C. Load-100 kg, indenter-1.6 mm diameter ball
3.

The Brale indenter is used for which hardness measurement method?

A. Vicker’s
B. Rockwell
C. Knoop
D. Microhardness
Answer» C. Knoop
4.

The Rockwell hardness scale is divided into 100 equal division, with each division representing a depth of __________

A. 0.002 mm
B. 0.001 mm
C. 0.01 mm
D. 1 mm
Answer» B. 0.001 mm
5.

The Rockwell hardness number unit is equal to __________

A. kg/mm2
B. kg/mm
C. kg-mm2
D. unit less
Answer» E.
6.

The minor load in the Rockwell hardness measurement is generally equal to ___________

A. 50 kg
B. 150 kg
C. 10 kg
D. 20 kg
Answer» D. 20 kg
7.

The most widely used hardness method is ______________

A. Rockwell
B. Knoop
C. Vicker’s
D. Brinell
Answer» B. Knoop
8.

In the case of Vicker’s hardness measurement, the softer material will have a higher hardness number, and harder material will have lower VHN.

A. True
B. False
Answer» C.
9.

The Vicker’s hardness number is given as _____________

A. P/L
B. P/L2
C. 1.854*P/L2
D. 1.854*P/L
Answer» D. 1.854*P/L
10.

The indenter used in the Vicker’s hardness tester is _______________

A. steel ball with 1.6 mm diameter
B. steel ball with 10mm diameter
C. square-base diamond pyramid
D. square-base flat-pyramid
Answer» D. square-base flat-pyramid