# Test: Metal Casting - 1

## 20 Questions MCQ Test RRB JE for Mechanical Engineering | Test: Metal Casting - 1

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Attempt Test: Metal Casting - 1 | 20 questions in 60 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study RRB JE for Mechanical Engineering for Mechanical Engineering Exam | Download free PDF with solutions
QUESTION: 1

Solution:
QUESTION: 2

Solution:

QUESTION: 3

### While cooling, a cubical casting of side 40 mm undergoes 3%, 4% and 5% volume shrinkage during the liquid state, phase transition and solid state, respectively. The volume of metal compensated from the riser is

Solution:

For riser we don’t consider the shrinkage for solid state.

QUESTION: 4

Which of the following materials can be used for making patterns?

1. Aluminium

2. Wax

3. Mercury

4. Lead

Select the correct answer using the codes given below:

Solution:

Aluminium, wax and mercury can be used for making patterns

QUESTION: 5

Shrinkage allowance on pattern is provided to compensate for shrinkage when

Solution:
QUESTION: 6

In the grain -size determination using standard charts, the relation between the given size number n and the average number of grains 'N' per square inch at a magnification of 100 X is

Solution:
QUESTION: 7

A gating ratio of 1: 2: 4 is used to design the gating system for magnesium alloy casting. This gating ratio refers to the cross· section areas of the various gating elements as given below:

1. Down sprue   2. Runner bar  3. Ingates

The correct sequence of the above elements in the ratio 1: 2: 4 is

Solution:
QUESTION: 8

Which one of the following gating systems is best suited to obtain directional solidification?

Solution:
QUESTION: 9

According to Chvorinov's equation, the solidification time of a casting is proportional to:

v = volume of casting

Solution:

QUESTION: 10

With a solidification factor of 0.97 x 102 s/m2, the solidification time (in seconds) for a spherical casting of 200 mm diameter is

[GATE-2003]

Solution:

QUESTION: 11

Chills are used in moulds to

Solution:
QUESTION: 12

Assertion (A): Steel can be melted in hot blast cupola.

Reason (R): In hot blast cupola, the flue gases are used to preheat the air blast to the cupola so that the temperature in the furnace is considerably higher than that in a conventional cupola.

Solution:
QUESTION: 13

Scab is a

Solution:
QUESTION: 14

Which of the following are employed in shell moulding?

1. Resin binder 2. Metal pattern 3. Heating coils

Select the correct answer using the code given below:

Solution:

Shell moulding employed heated (1500) metal pattern with resin binder.

QUESTION: 15

The mould in shell moulding process is made up of which of the following?

Solution:
QUESTION: 16

Which of the following materials are used for making patterns in investment casting method?
1. Wax   2. Rubber  3. Wood   4. Plastic

Select the correct answer using the codes given below:

Solution:

Wood cannot be used for patterns in investment casting as by heating wood cannot be liquefied.

QUESTION: 17

During normalizing process of steel, the specimen is heated

Solution:

Normalising involves prolonged heating just above the critical temperature to produce globular form of carbine and then cooling in air.

QUESTION: 18

Which of the following are produced by slush casting?

Solution:
QUESTION: 19

In which of the following are metal moulds used?

Solution:
QUESTION: 20

Match List I with List II and select the correct answer using the codes given below the lists:

Solution:

Hot chamber machine is associated with die casting, Muller with mixing of sand, dielectric baker with core making and sand blasting with cleaning.

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