16
If more than two branches of pipes are to be connected at the same point, then which of the following is used?
1
Elbow
2
Union
3
Tee
4
None of the above
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17
Pressure drop in a packed bed for laminar flow is given by
1
Kozeny-Carman equation
2
Blake-Plummer equation
3
Leva's equation
4
None of them
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Answer: Kozeny-Carman equation
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18
How many atoms are there per unit cell in a body-centred cubic lattice system?
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19
A material is able to retain the deformation permanently by virtue of its
1
elasticity
2
plasticity
3
ductility
4
malleability
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20
Which one is a non-magnetic material?
1
Cobalt
2
Nickel
3
Zinc
4
None of the above
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21
Which metal is protected by the layer of its own oxide?
1
Iron
2
Silver
3
Calcium
4
Aluminium
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22
The viscosity of atmospheric air may be about centipoise.
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23
The quantity of heat required to evaporate 1 kg of a saturated liquid is called
1
specific heat
2
1 kcal
3
1 calorie
4
latent heat
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24
The softest material in Mohs scale is
1
talc
2
gypsum
3
rubber
4
iron
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25
Teflon is corroded by
1
hydrochloric acid (10%)
2
hydrochloric acid (95%)
3
sulphuric acid
4
None of the above
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Answer: None of the above
26
Vena contracta formed during flow of a liquid through an orifice meter has
1
minimum liquid cross-section
2
more diameter compared to orifice diameter
3
minimum velocity of fluid stream
4
None of the above
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Answer: minimum liquid cross-section
27
"The total volume occupied by a gaseous mixture is equal to the sum of the pure component volume." This is
1
Dalton's law
2
Amagat's law
3
Gay-Lussac law
4
Avogadro's law
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28
Plunger pumps are used for
1
higher pressure
2
slurries
3
viscous mass
4
None of the above
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29
The total energy at a point comprises of energy
1
potential and kinetic
2
pressure
3
internal
4
All of the above
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30
An example of non-Newtonian fluid may be
1
ideal gas
2
thin liquid
3
thick, long-chain hydrocarbon
4
None of the above
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Answer: thick, long-chain hydrocarbon
