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Objective Questions & Answers for APSC Chemical Engineering Examination | GkSeries

(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
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
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
Answer: 2
(19) A material is able to retain the deformation permanently by virtue of its
1 elasticity
2 plasticity
3 ductility
4 malleability
Answer: plasticity
(20) Which one is a non-magnetic material?
1 Cobalt
2 Nickel
3 Zinc
4 None of the above
Answer: Zinc
(21) Which metal is protected by the layer of its own oxide?
1 Iron
2 Silver
3 Calcium
4 Aluminium

Answer: Aluminium
(22) The viscosity of atmospheric air may be about centipoise.
1 1*5
2 15
3 150
4 0 015

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

Answer: latent heat
(24) The softest material in Mohs scale is
1 talc
2 gypsum
3 rubber
4 iron

Answer: talc
(25) Teflon is corroded by
1 hydrochloric acid (10%)
2 hydrochloric acid (95%)
3 sulphuric acid
4 None of the above

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

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

Answer: Amagat's law
(28) Plunger pumps are used for
1 higher pressure
2 slurries
3 viscous mass
4 None of the above

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

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

Answer: thick, long-chain hydrocarbon

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