APSC Chemical Engineering MCQs with Answers | Chemical Engineering Questions for PSC Exams

61 Find the odd one out.

1 Digboi Refinery

2 Numaligarh Refinery

3 Guwahati Refinery

4 Bongaigaon Refinery

View Answer

Answer: Numaligarh Refinery

62 Penetrating index and softening points are determined for

1 gasoline

2 kerosine

3 bitumen

4 gas oil

View Answer

Answer: bitumen

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63 Mercury is transported in metal containers made of

1 aluminium

2 lead

3 iron

4 nickel

View Answer

Answer: iron

64 'Sour' crude means the crude oil contains

1 wax

2 paraffins and asphalts

3 nitrogen compounds

4 sulphur compounds

View Answer

Answer: sulphur compounds

65 Washing soda is

1 Na2C03

2 Na2C03 H20

3 Na2C0310H20

4 NaHCQ3

View Answer

Answer: Na2C0310H20

66 The main purpose of galvanizing iron sheets is to

1 harden the surface

2 increase the glossiness and luster

3 prevent the action of water

4 prevent the action of oxygen

View Answer

Answer: prevent the action of water

67 Ammonia synthesis reaction is

1 exothermic

2 endothermic

3 autocatalytic

4 None of the above

View Answer

Answer: exothermic

68 A material is called ductile if it can be

1 drawn into wire

2 hammered into a thin sheet

3 fractured without deformation

4 made lustrous by heating it

View Answer

Answer: drawn into wire

69 Which is an amorphous material?

1 Glass

2 Mica

3 Brass

4 Cast iron

View Answer

Answer: Glass

70 Which of the following is the easiest to crack?

1 Paraffin

2 Olefin

3 Naphthene

4 Aromatic

View Answer

Answer: Paraffin

71 Laminar flow of a Newtonian fluid ceases to exist, when Reynolds number exceeds

1 4000

2 2100

3 1500

4 3000

View Answer

Answer: 2100

72 Head developed by a centrifugal pump depends on its

1 speed

2 impeller diameter

3 Both (A) and (B)

4 None of the above

View Answer

Answer: Both (A) and (B)

73 The most commonly used joint in underground pipeline is the

1 sleeve joint

2 coupling

3 flange

4 expansion joint

View Answer

Answer: sleeve joint

74 Flow measurement in open channels is done by

1 venturi meter

2 orifice meter

3 weir

4 rotameter

View Answer

Answer: weir

75 The catalyst used in catalytic reforming is

1 platinum on alumina

2 nickel

3 iron

4 aluminium chloride

View Answer

Answer: platinum on alumina

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