RRB-JE 2018 2nd STAGE CBT - Engineers Institute of India

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RRB-JE 2018 2nd STAGE CBT

MEHANICAL ENGINEERING

02.

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Multiple choice Questions : RRB-JE Mechanical Sample Practice Test

RRB -JE 2018 SYLABUS MATERIAL SCIENCE

Mechanical properties of engineering materials – tensile strength, compressive

strength, ductility, malleability, hardness, toughness, brittleness, impact strength,

fatigue, creep resistance.

Classification of steels, mild steel and alloy steels.

Importance of heat treatment. Heat treatment processes – annealing, normalizing,

hardening, tempering, carburizing, nitriding and cyaniding.



Basics Test –MCQ Set : 1

1. A measure of Rockwell hardness is the

(a.) Depth of penetration of indenter (b.) Surface area of indentation

(c.) Projected area of indentation (d.) Height of rebound

Ans b

1. The surface hardening process which is used for High Carbon Steels is

(a) Car burizing (b) Nitriding

(c) Induction hardening (d) Cyaniding

Ans. (c)

2. After normalizing a steel specimen has the micro structure of

(a) Fine pearlite (b) Coarse pearlite

(c) Martensite (d) Bainite

Ans. (a)

3. At room temperature, a large grain size metal generally has

(a) High strength (b) Low ductility

(c) High hardness (d) All of the above

Ans. (b)

4. Which of the following metal when included with steel, improves its atmospheric

corrosion resistance:-

(a) Cobalt (b) Sulfur (c) Lead (d) Copper

Ans. (d)

5. Killed steel is

(a) Free of Carbon

(b) Free of Magnesium

(c) Free of Coke

(d) Free of Oxygen



Ans. (d

6. If Carbon content in steels is increased then

(a) Toughness increases

(b) Brittleness increases

(c) Ductility increases

(d) Steel becomes salt

Ans. (b)

7. Stainless steel has a high content of

(a) Chromium

(b) Nickel

(c) Magnesium

(d) Tungsten

Ans. (a)

8. Martensite steel has the structure of _________ solid.

(a) FCC (b) BCC (c) BCT (d) HCP

Ans. (c)

9. Carbon content in AISI designated 1112 steel is

(a) 11% (b) 0.11% (c) 12% (d) 0.12%

Ans. (d)

10. Process of hardening of steel by heating it to a temp of 30-500C above critical

temperature is called

(a) Tempering (b) Annealing

(c) Quenching (d) Normalizing

Ans. (c)

11. Inclusion of FCC elements in steel increases



(a) Toughness (b) Brittleness

(c) Hardness (d) Creep

Ans. (a)

12. An iron – carbon binary alloy has 6.67%C by weight. What is this alloy called?

(a.) Eutectoid (b.) Cementite

(b.) (c.) Peritectic (d.) Eutectic

Ans b

13. For a Monoclinic space lattice, which one of the following is correct?

(a.) o o; 90 , 120a b c (b.) o o; 90 , 120a b c

(c.) o o; 90 , 120a b c (d.) o o; 90 , 120a b c

Ans c

14. Match the following group 1 items with group 2 items and select the correct option

1. Durometers A. Value of modulus of rigidity

2. Brinell Hardness test B. To verify formability

C. Hardness of non-metallic materials like plastics

4. Erichsen cupping test D. Hardness of soft and ductile materials

a. 1 – D, 2 – B, 3 – A, 4 – C

b. 1 – C, 2 – D, 3 – A, 4 – B

c. 1 – B, 2 – A, 3 – D, 4 – C

d. 1 – D, 2 – A, 3 – B, 4 – C

Ans: b

15. Which process is used to remove internal stresses from a metal?

a. Annealing

b. Cold working

c. Both a. and b.

d. None of the above

Ans: a



16. Before compacting the metals, which

process is annealed to remove the

effects of cold working?

a. Machining

b. Crushing

c. Shotting

d. All of these

Ans: c

17. Which among the following is not a

type of Non-destructive testing?

a. compression test

b. visual testing

c. ultrasonic testing

d. eddy current testing

Ans: a

18. What is meant by resilience in stress

strain curve?

a. area in the plastic region

b. area in the elastic region

c. area in elastic and plastic region

d. none of the above

Ans: b

19. How is Ester produced?

a. Addition polymerization

b. Condensation polymerization

c. Substitutional polymerization

d. None of these

Ans: b

20. What happens when thermosetting

polymers are heated?

a. They become soft

b. They are deformed

c. They become rigid

d. All of the above

Ans: b

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RRB-JE 2018 2nd STAGE CBT - Engineers Institute of India