61
Find the odd one out.
1
Digboi Refinery
2
Numaligarh Refinery
3
Guwahati Refinery
4
Bongaigaon Refinery
Answer: Numaligarh Refinery
62
Penetrating index and softening points are determined for
1
gasoline
2
kerosine
3
bitumen
4
gas oil
63
Mercury is transported in metal containers made of
1
aluminium
2
lead
3
iron
4
nickel
64
'Sour' crude means the crude oil contains
1
wax
2
paraffins and asphalts
3
nitrogen compounds
4
sulphur compounds
Answer: sulphur compounds
65
Washing soda is
1
Na2C03
2
Na2C03 H20
3
Na2C0310H20
4
NaHCQ3
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
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
69
Which is an amorphous material?
1
Glass
2
Mica
3
Brass
4
Cast iron
View Answer
70
Which of the following is the easiest to crack?
1
Paraffin
2
Olefin
3
Naphthene
4
Aromatic
View Answer
71
Laminar flow of a Newtonian fluid ceases to exist, when Reynolds number exceeds
1
4000
2
2100
3
1500
4
3000
View Answer
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
73
The most commonly used joint in underground pipeline is the
1
sleeve joint
2
coupling
3
flange
4
expansion joint
View Answer
74
Flow measurement in open channels is done by
1
venturi meter
2
orifice meter
3
weir
4
rotameter
View Answer
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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