Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 14 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 nil ductility temperature (NDT) was used in world war-II for analysis of breaking ship. The NDT is defined as the ______

A. maximum temperature where fracture is 100% brittle
B. minimum temperature where fracture is 100% ductile
C. maximum Temperature where fracture is 50% brittle and 50% ductile
D. maximum Temperature above which the fracture is 100% ductile
Answer» C. maximum Temperature where fracture is 50% brittle and 50% ductile
Discussion
2.

The fracture appearance transition temperature (FATT) point is defined as the _______

A. point where fracture is 100% brittle
B. point where fracture is 100% ductile
C. point where fracture is 50% brittle and 50% ductile
D. point above which the fracture is 100% ductile
Answer» D. point above which the fracture is 100% ductile
Discussion
3.

The fracture transition plastic (FTP) point is defined as __________

A. point where fracture is 100% brittle
B. point where fracture is 100% ductile
C. point where fracture is 50% brittle and 50% ductile
D. point above which the fracture is 100% ductile
Answer» E.
Discussion
4.

The ductile to brittle transition temperature in metal is around ____ of melting point (Tm)?a) 0.1 Tmb) 0.5 Tmc) 0.9 Tmd) 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?

A. 0.1 Tmb) 0.5 Tmc) 0.9 Tmd) 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?a) 0.1 Tm
B. 0.5 Tmc) 0.9 Tmd) 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?a) 0.1 Tmb) 0.5 Tm
C. 0.9 Tmd) 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?a) 0.1 Tmb) 0.5 Tmc) 0.9 Tm
D. 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?a) 0.1 Tmb) 0.5 Tmc) 0.9 Tmd) 0.0001 TmView Answer
Answer» B. 0.5 Tmc) 0.9 Tmd) 0.0001 Tm 12.The ductile to brittle transition temperature in ceramic is around ____ of melting point (Tm)?a) 0.1 Tmb) 0.5 Tm
Discussion
5.

Which of the following material has highest tendency for ductile to brittle transition?

A. FCC
B. HCP
C. BCC
D. DBTT does depends on crystal structure
Answer» D. DBTT does depends on crystal structure
Discussion
6.

The given absorbed energy vs. temperature graph shows the curve for different types of material. Which of the following shows the curve for high-strength material?

A. A
B. B
C. C
D. D
Answer» D. D
Discussion
7.

The given absorbed energy vs temperature graph shows the curve for different types of material. Which of the following shows the curve for BCC material?

A. A
B. B
C. C
D. D
Answer» C. C
Discussion
8.

The given absorbed energy vs temperature graph shows the curve for different types of material. Which of the following shows the curve for FCC material?

A. A
B. B
C. C
D. D
Answer» B. B
Discussion
9.

The relation between amount of energy absorbed and test temperature is shown by curve _____

A. A
B. B
C. C
D. D
Answer» C. C
Discussion
10.

The nature of fracture in charpy test is not determine by __________

A. distance hammer travelled after impact
B. appearance of the fracture surface
C. the amount of energy absorbed
D. the type of loading
Answer» E.
Discussion
11.

The principle result in the impact test is the energy absorbed in the fracturing of the sample.

A. True
B. False
Answer» B. False
Discussion
12.

The maximum plastic stress concentration accumulated at the crack tip, is given by ________ (where w is the included flank angle of the notch).

A. Kσ=[1+(π/2)-(w/2)]
B. Kσ=[1+(π/2)+(w/2)]
C. Kσ=[1+(π/2)(w/2)]
D. Kσ=[1-(π/2)-(w/2)]
Answer» B. Kσ=[1+(π/2)+(w/2)]
Discussion
13.

In both the Charpy and Izod impact testing, the load is applied from the backside on notch for causing fracture.

A. True
B. False
Answer» C.
Discussion
14.

Which of the following is not among the basic condition responsible for causing the fracture of brittle?

A. A triaxle state of stress
B. Low temperature
C. High strain rate
D. Large sample width
Answer» E.
Discussion