Chemical Engineering - Chemical Engineering Basics

26. 

Iron content in Indian iron ore is about __________ percent.

A. 80-85
B. 60-65
C. 40-45
D. 20-25

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

27. 

The heat treatment to which the steel wire containing > 0.25% carbon is subjected to is

A. full annealing
B. bright annealing
C. patenting
D. none of these

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

28. 

__________ of hard alloy and tool steel is done to make it easily machinable.

A. Case carburising
B. Tempering
C. Normalising
D. Annealing

Answer: Option B

Explanation:

No answer description available for this question. Let us discuss.

29. 

Which of the following mainly decides the current to be employed is arc welding ?

A. Electrode size
B. Plate thickness
C. Voltage across the arc
D. Welded portion length

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

30. 

Temperature attained in soldering of metals is about __________ °C.

A. 150-300
B. 400-500
C. 650-800
D. 1000-1100

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.