Objective Questions & Answers for APSC Chemical Engineering Examination

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

View Answer

Answer: Tee

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

View Answer

Answer: Kozeny-Carman equation

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18 How many atoms are there per unit cell in a body-centred cubic lattice system?

1 2

2 3

3 4

4 6

View Answer

Answer: 2

19 A material is able to retain the deformation permanently by virtue of its

1 elasticity

2 plasticity

3 ductility

4 malleability

View Answer

Answer: plasticity

20 Which one is a non-magnetic material?

1 Cobalt

2 Nickel

3 Zinc

4 None of the above

View Answer

Answer: Zinc

21 Which metal is protected by the layer of its own oxide?

1 Iron

2 Silver

3 Calcium

4 Aluminium

View Answer

Answer: Aluminium

22 The viscosity of atmospheric air may be about centipoise.

1 1*5

2 15

3 150

4 0 015

View Answer

Answer: 0 015

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

View Answer

Answer: latent heat

24 The softest material in Mohs scale is

1 talc

2 gypsum

3 rubber

4 iron

View Answer

Answer: talc

25 Teflon is corroded by

1 hydrochloric acid (10%)

2 hydrochloric acid (95%)

3 sulphuric acid

4 None of the above

View Answer

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

View Answer

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

View Answer

Answer: Amagat's law

28 Plunger pumps are used for

1 higher pressure

2 slurries

3 viscous mass

4 None of the above

View Answer

Answer: slurries

29 The total energy at a point comprises of energy

1 potential and kinetic

2 pressure

3 internal

4 All of the above

View Answer

Answer: All of the above

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

View Answer

Answer: thick, long-chain hydrocarbon

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