Manufacturing Technology (3151912) MCQs

MCQs of Metal Joining Processes

Showing 41 to 50 out of 137 Questions
2 3 4 5 6 7
41.

Changing the size of one electrode

(a)

High speed steel
(b)

Stainless steel
(c)

Cast iron
(d)

Geiman silver
Answer:

Option (c)

42.

Grey cast iron is usually welded by

(a)

Gas welding
(b)

Spot welding
(c)

Arc welding
(d)

TIG welding
Answer:

Option (a)

43.

The welding of stainless is generally difficult because of the following reason

(a)

Rust formation takes place
(b)

High melting temperature of stainless steel
(c)

Formation of oxide film
(d)

Formation of chromium carbide
Answer:

Option (b)

44.

The temperature produced by oxy-hydrogen flame is about

(a)

1800° C
(b)

2100° C
(c)

2400° C
(d)

3200° C
Answer:

Option (c)

45.

The temperature produced in oxyhydrogen flame as compared to oxy-acetylene flame is

(a)

Same
(b)

More
(c)

Less
(d)

Unpredictable
Answer:

Option (c)

46.

Which of the following materials is best cut by oxy-cutting process

(a)

Brass
(b)

Mild steel
(c)

Bronze
(d)

Stainless steel
Answer:

Option (b)

47.

Oxy-acetylene flame cuts metal by its

(a)

Evaporation
(b)

Intensive oxidation
(c)

Burning
(d)

Rusting
Answer:

Option (b)

48.

The gas torch is usually lighted by a friction lighter because

(a)

It is easier to operate and maintain
(b)

Of low initial cost
(c)

Spark is created for very short duration
(d)

Of safety of operator
Answer:

Option (d)

49.

Positive pressure type torch works on

(a)

Equal pressure principle
(b)

Positive pressure principle
(c)

Differential pressure principle
(d)

Equal volume principle
Answer:

Option (a)

50.

In welding copper alloys with TIG arc welding

(a)

direct current with straight polarity is used
(b)

direct current with reversed polarity is used
(c)

alternating current is used
(d)

any one of these
Answer:

Option (a)

Showing 41 to 50 out of 137 Questions
2 3 4 5 6 7