Manufacturing and Industrial Engineering-Joining (IES-ESE Mechanical Engineering): Questions 28 - 32 of 50

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Question number: 28

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2004

Assertion-Reason▾

Assertion (Ꭺ)

In electron beam welding process, vacuum is an essential process parameter

Reason (Ꭱ)

Vacuum provides a highly efficient shield on weld zone

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Both Ꭺ and Ꭱ are false

d.

Ꭺ is true but Ꭱ is false

Question number: 29

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 1994

MCQ▾

Question

In gas welding of mild steel using an oxy-acetylene flame. the total amount of acetylene consumed was 10 litre. The oxygen consumption from the cylinder is

Choices

Choice (4) Response

a.

20 litre

b.

10 litre

c.

15litre

d.

5 litre

Question number: 30

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2001

MCQ▾

Question

Pinch effect in welding is the result of

Choices

Choice (4) Response

a.

Expansion of gases in the arc

b.

Electric force

c.

Surface tension of the molten metal

d.

Electromagnetic forces

Question number: 31

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2003

MCQ▾

Question

In resistance welding, heat is generated due to the resistance between

Choices

Choice (4) Response

a.

Electrode and workpiece

b.

Inter atomic forces

c.

Asperities between touching plates

d.

Two dissimilar metals being in contact

Question number: 32

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2012

Assertion-Reason▾

Assertion (Ꭺ)

DC with reverse polarity is used in MIG welding

Reason (Ꭱ)

Use of DC with reverse polarity enables deeper penetration and a clean Surface

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

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