Chemical Engineering - Chemical Engineering Basics

11. 

Tin is not present as an alloying element in

A. phosphor bronze
B. gun metal
C. fusible metal
D. white metal

Answer: Option D

Explanation:

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

12. 

Thermit welding uses the following energy source.

A. Electrical energy.
B. Chemical energy.
C. Energy of high velocity electrons.
D. Heat generated by friction.

Answer: Option B

Explanation:

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

13. 

The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the

A. pipe roughness & pipe diameter.
B. fluid velocity.
C. type of flowing fluid.
D. both 'b' & 'c'.

Answer: Option D

Explanation:

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

14. 

Flue gases pass through the following boiler accessories in a high pressure natural circulation boiler.
A. Induced draft fan B. Economiser C. Air preheater D. Steam superheater
Which of the following gives the correct sequence of flow of the flue gases through the above mentioned boiler accessories ?

A. A, C, B, D
B. D, B, C, A
C. D, C, B, A
D. D, A, B, C

Answer: Option B

Explanation:

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

15. 

Case hardening of a material is

A. followed by tempering or carburising.
B. preceded by its tempering.
C. done to get a soft ductile interior with a very hard surface.
D. carried out to get extreme hardness in its core.

Answer: Option D

Explanation:

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