BE Chemical Engineering Multiple Choice Questions - Set 07

Practice Test: Question Set - 07

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1. Corona discharge is related to the operation of a/an

(A) Induction motor

(B) Electrostatic precipitator

(C) Fast breeder reactor

(D) Magneto hydrodynamic generator (MHD)

Answer: Option B

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2. With increase in annealing temperature, the following defect density decreases.

(A) Vacancy

(B) Dislocation

(C) Grain boundary

(D) All of these

Answer: Option D

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3. Minimum thermal efficiency of a steam boiler may be around __________ percent

(A) 25

(B) 45

(C) 65

(D) 20

Answer: Option D

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4. The leaching solvent used in Baeyer's process for the purification of bauxite is

(A) Ammonium hydroxide

(B) Sodium carbonate

(C) Sodium hydroxide

(D) Ammonium carbonate

Answer: Option B

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5. Eutectic reaction for iron-carbon system occurs at a temperature of _________ °C.

(A) 723

(B) 959

(C) 1147

(D) 1493

Answer: Option A

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6. Boiling point of water gets lowered at high altitudes (e.g., hills), because

(A) Temperature is low

(B) Atmospheric pressure is low

(C) Atmospheric pressure is high

(D) None of these

Answer: Option B

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7. Consider the equilibrium A_(g) + B_(g) = AB_(g). When the partial pressure of A is 10^-2 atm, the partial pressure of B is 10^-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant 'K' is

(A) 10 atm^-1

(B) 10⁵ atm^-1

(C) 10 (dimensionless)

(D) 10⁵ (dimensionless)

Answer: Option B

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8. The process of removal of scale formed during hot rolling of steel is termed as

(A) Descaling

(B) Shot blasting

(C) Pickling

(D) Skimming

Answer: Option C

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9. Tesla meter per ampere (T. m/A) is the unit for the measurement of

(A) Magnetic susceptibility

(B) Magnetic moment

(C) Permeability of free space

(D) Flux density

Answer: Option C

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10. Alcohols are not suitable as diesel engine fuel because the cetane number of alcohols is

(A) Very low which prevents their ignition by compression

(B) Very high which prevents their ignition by compression

(C) Zero

(D) None of these

Answer: Option A

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11. The joint for soldering is supported by binding wire made of

(A) Mild steel

(B) Copper

(C) Soft iron

(D) Stainless steel

Answer: Option C

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12. Which of the following is used to produce draught in the locomotive boilers?

(A) Chimney

(B) Induced draught fan

(C) Forced draught fan

(D) Steam jet arrangement

Answer: Option D

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13. The bolt is subjected to _________ when the nut is tightened by putting the washer beneath it.

(A) Tension

(B) Shear

(C) Compression

(D) Bending & tension

Answer: Option A

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14. Which of the following materials has the least scrap value?

(A) Aluminium

(B) Stainless steel

(C) Brass

(D) Copper

Answer: Option B

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15. Temperature profile along the length of a gas-gas counter flow heat exchanger is correctly represented by

Answer: Option A

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View All Answers

01. Answer: Option B 02. Answer: Option D 03. Answer: Option D 04. Answer: Option B 05. Answer: Option A 06. Answer: Option B 07. Answer: Option B 08. Answer: Option C 09. Answer: Option C 10. Answer: Option A 11. Answer: Option C 12. Answer: Option D 13. Answer: Option A 14. Answer: Option B 15. Answer: Option A

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