IES-ESE Mechanical Engineering: Questions 30 - 33 of 81

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Question number: 30

» Manufacturing and Industrial Engineering » Metal Casting » Design of Patterns

Appeared in Year: 1996

MCQ▾

Question

Which of the following methods are used for obtaining directional solidification for riser design

1. Suitable placement of chills

2. Suitable placement of chaplets

3. Employing padding

Select the correct answer.

Choices

Choice (4) Response
a.

1 and 2

b.

1 and 3

c.

1, 2 and 3

d.

2 and 3

Question number: 31

» Manufacturing and Industrial Engineering » Metal Casting » Design Considerations

Appeared in Year: 1999

MCQ▾

Question

In solidification of metal during casting, compensation for solid contraction is

Choices

Choice (4) Response
a.

Achieved by properly placed risers

b.

Obtained by promoting directional solidification

c.

Provided by the oversize pattern

d.

Made by providing chills

Question number: 32

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2000

MCQ▾

Question

Which one of the following statements is correct?

Choices

Choice (4) Response
a.

No flux is used in gas welding of mild steel

b.

Borax is the commonly used flux coating on welding electrodes

c.

Laser beam welding employs a vacuum chamber and thus avoids use of a shielding method

d.

AC can be used for GTAW process

Question number: 33

» Manufacturing and Industrial Engineering » Joining » Physics of Welding

Appeared in Year: 2008

Assertion-Reason▾

Assertion (Ꭺ)

Submerged arc welding is not recommended for high carbon steels, tool steels, aluminium, magnesium etc.

Reason (Ꭱ)

This is because of unavailability of suitable fluxes, reactivity at high temperatures and low sublimation temperatures.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are false
d. Ꭺ is true but Ꭱ is false

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