Basic Chemical Engineering Interview Questions and Answers - Set 30

Practice Test: Question Set - 30

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1. Which of the following is the largest quantum of pressure?

(A) 1 kg/cm²

(B) 1 bar

(C) 1 atmosphere

(D) 1 kilo Pascal

Answer: Option C

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2. The refractory brick which has good thermal shock resistance at high temperature but cracks on cooling below 400°C is

(A) Magnesite

(B) Chrome

(C) Silica

(D) Fireclay

Answer: Option C

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3. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at

(A) High vacuum

(B) Zero pressure

(C) 0°K

(D) Earth's center

Answer: Option B

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4. __________ temperature remains constant during adiabatic saturation process of unsaturated air.

(A) Dew point

(B) Dry bulb

(C) Wet bulb

(D) None of these

Answer: Option C

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5. In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is

(A) Less

(B) More

(C) Equal

(D) Unpredictable

Answer: Option A

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6. Resilience of a bolt can be increased by increasing its

(A) Length

(B) Shank diameter

(C) Head diameter

(D) None of these

Answer: Option A

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7. The maximum stress below which a material can withstand an infinite number of cycle of stress, is termed as the

(A) Fatigue strength

(B) Creep strength

(C) Resilience

(D) Endurance limit

Answer: Option D

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8. Maximum permissible air velocity in pipelines is about __________ meter/second.

(A) 5

(B) 10

(C) 20

(D) 40

Answer: Option B

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9. Hot working of lead is carried out at

(A) 75°C

(B) 373°K

(C) 150°C

(D) Room temperature

Answer: Option B

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10. Which of the following is not the commercial name of poly-methyl-methacrylate (PMMA)?

(A) Styrofoam

(B) Lucite

(C) Perspex

(D) Plexiglass

Answer: Option A

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11. The Al₂O₃ content of cryolite in Hall-Heroult cell is maintained between __________ percent.

(A) 2-5

(B) 18-20

(C) 12-15

(D) 6-12

Answer: Option A

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12. Elimination of brittleness resulting from welding of saw blades is done by __________ of the welded portion.

(A) Annealing

(B) Toughening

(C) Work hardening

(D) Tempering

Answer: Option A

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13. Fatigue resistance of a material is measured by the

(A) Elastic limit

(B) Ultimate tensile strength

(C) Young's modulus

(D) Endurance limit

Answer: Option D

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14. In a neutral solution

(A) H⁺ ions are absent

(B) OH^- ions are absent

(C) Both H⁺ and OH^- ions are present in very small but equal concentration

(D) None of these

Answer: Option C

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15. Ultimate strength in tension as compared to that in shear for steel is

(A) Half

(B) One third

(C) One and half times

(D) One fourth

Answer: Option C

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View All Answers

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

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