Chemical Engineering - Chemical Engineering Basics

36. 

Air-petrol ratio in an automotive petrol engine is around

A. 14 : 1
B. 22 : 1
C. 25 : 1
D. 4 : 1

Answer: Option A

Explanation:

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

37. 

The property of material, by which a given amount of energy is absorbed by it, without plastic deformation is called

A. resilience
B. toughness
C. ductility
D. impact strength

Answer: Option A

Explanation:

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

38. 

Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

A. occurs higher in the electro-chemical series of metals.
B. is exemplified by magnesium plate.
C. is much cheaper than the cathodic base material to be guarded against corrosion.
D. all (a), (b) & (c).

Answer: Option D

Explanation:

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

39. 

Electrochemical corrosion can occur, only if __________ is present in contact with metal.

A. air
B. oxygen
C. liquid medium
D. gaseous medium

Answer: Option C

Explanation:

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

40. 

Crystallisation of polymers is an undesirable property. Crystallisation of celluloid is prevented by adding

A. glycerol
B. nitro cellulose
C. camphor
D. none of these

Answer: Option D

Explanation:

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