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MCQ - Mechanical TNPSC JTO
JTO - 440 - Welder - 440 - Unit VI Gas Cylinders and Regulators

1)   

Calcium carbide reacts with water to produce:

A.
B.
C.
D.
Answer: B
2)   

The chemical formula of calcium carbide is:

A.
B.
C.
D.
Answer: B
3)   

Acetylene gas is produced in a generator by mixing calcium carbide with:

A.
B.
C.
D.
Answer: B
4)   

One hazard of acetylene is that it is:

A.
B.
C.
D.
Answer: B
5)   

Calcium carbide must be stored in:

A.
B.
C.
D.
Answer: C
6)   

When water comes in contact with calcium carbide, the byproduct besides acetylene gas is:

A.
B.
C.
D.
Answer: B
7)   

Maximum safe working pressure for acetylene in a cylinder is:

A.
B.
C.
D.
Answer: C
8)   

Acetylene is lighter than air and rises quickly. True or False?

A.
B.
C.
D.
Answer: B
9)   

Acetylene cylinders are filled with:

A.
B.
C.
D.
Answer: B
10)   

The flammable range of acetylene in air is approximately:

A.
B.
C.
D.
Answer: B
11)   

A flashback in welding is:

A.
B.
C.
D.
Answer: B
12)   

The device used to stop a flame travelling back to the cylinder is called:

A.
B.
C.
D.
Answer: B
13)   

Flashback arrestors are fitted on:

A.
B.
C.
D.
Answer: C
14)   

Flashback can be caused by:

A.
B.
C.
D.
Answer: D
15)   

A flashback arrestor prevents:

A.
B.
C.
D.
Answer: B
16)   

Oxygen used in welding should be:

A.
B.
C.
D.
Answer: C
17)   

The color of industrial oxygen cylinder is:

A.
B.
C.
D.
Answer: A
18)   

Oxygen supports:

A.
B.
C.
D.
Answer: A
19)   

Oxygen cylinders are charged up to a pressure of:

A.
B.
C.
D.
Answer: A
20)   

Oxygen should never be used with oil or grease because:

A.
B.
C.
D.
Answer: B
21)   

While charging oxygen cylinders, the operator must:

A.
B.
C.
D.
Answer: A
22)   

Acetylene cylinder charging is done using:

A.
B.
C.
D.
Answer: B
23)   

Before charging, cylinders must be tested for:

A.
B.
C.
D.
Answer: A
24)   

During charging, the cylinder valve should be opened:

A.
B.
C.
D.
Answer: B
25)   

Acetylene cylinders are charged to about:

A.
B.
C.
D.
Answer: C