Explore topic-wise MCQs in Casting.

This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Casting knowledge and support exam preparation. Choose a topic below to get started.

1.

How much is the thermal efficiency of a direct arc furnace?

A. 50%
B. 60%
C. 70%
D. 80%
Answer» D. 80%
Discussion
2.

Basic refractories are costlier than acid refractories.

A. True
B. False
Answer» B. False
Discussion
3.

Roofs of the furnace have a small life.

A. True
B. False
Answer» B. False
Discussion
4.

What is the maximum transformer power supply needed by the direct arc furnace?

A. 35,000 kVA
B. 40,000 kVA
C. 45,000 kVA
D. 50,000 kVA
Answer» C. 45,000 kVA
Discussion
5.

BASIC_REFRACTORIES_ARE_COSTLIER_THAN_ACID_REFRACTORIES.?$

A. True
B. False
Answer» B. False
Discussion
6.

How_much_is_the_thermal_efficiency_of_a_direct_arc_furnace?$

A. 50%
B. 60%
C. 70%
D. 80%
Answer» D. 80%
Discussion
7.

Roofs of the furnace have a small life?

A. True
B. False
Answer» B. False
Discussion
8.

What would be the amount of current carried by the electrode for a direct arc furnace having capacity 50 tons?

A. 25 kilo amperes
B. 25 mega amperes
C. 25 micro amperes
D. 25 nano amperes
Answer» B. 25 mega amperes
Discussion
9.

What is typically the diameter of a direct arc furnace?

A. Up to 5m
B. Up to 6m
C. Up to 7m
D. Up to 8m
Answer» C. Up to 7m
Discussion
10.

What is the capacity of a largest direct arc furnace?

A. 110 tons
B. 115 tons
C. 125 tons
D. 140 tons
Answer» D. 140 tons
Discussion
11.

What is the minimum transformer power supply needed by the direct arc furnace?

A. 600 kVA
B. 700 kVA
C. 800 kVA
D. 900 kVA
Answer» D. 900 kVA
Discussion
12.

Which material is used for making the roof of an acid lined furnace?

A. Silica
B. Dolomite
C. Magnesite
D. Carbon tetrachloride
Answer» B. Dolomite
Discussion