Chemical Engineering Objective Questions and Answers pdf - Set 39

Practice Test: Question Set - 39

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1. __________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500°C.

(A) Borosilicate

(B) High silica

(C) Supermax

(D) Lead

Answer: Option C

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2. Out of the following __________ iron has the best capability to bear sudden & excessive shocks.

(A) White

(B) Cast

(C) Wrought

(D) Pig

Answer: Option C

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3. Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

(A) Cold

(B) Work

(C) Age

(D) Induction

Answer: Option B

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4. Which one is neutral in character?

(A) N₂O₄

(B) N₂O

(C) N₂O₅

(D) N₂O₃

Answer: Option B

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5. Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the

(A) Length of the pipe

(B) Diameter of the pipe

(C) Density of the fluid

(D) Velocity of the fluid

Answer: Option A

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6. The normal stress is the same in all directions at a point in a fluid, only when the fluid

(A) Is at rest & has zero viscosity

(B) Is frictionless

(C) Fluid layer has no motion relative to an adjacent layer of fluid

(D) Is incompressible & frictionless

Answer: Option D

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7. Softening of hardened steel is done by its

(A) Normalizing

(B) Tempering

(C) Annealing

(D) Carburizing

Answer: Option A

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8. Hot extrusion of aluminium is done in the temperature range of __________ °C.

(A) 550-600

(B) 450-500

(C) 350-400

(D) 250-300

Answer: Option C

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9. Potable water means the water used for

(A) Fire-fighting

(B) Cooling

(C) Drinking

(D) Evaporation to produce steam

Answer: Option C

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10. Diameter of the rivet to be provided on a 20 mm. thick boiler plate will be __________ mm.

(A) 10

(B) 20

(C) 30

(D) 40

Answer: Option D

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11. Which of the following gases cause global warming?

(A) Carbon monoxide

(B) Carbon dioxide

(C) Nitrogen

(D) Ozone

Answer: Option B

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12. What is the pH of distilled water?

(A) 0

(B) 1

(C) 7

(D) 14

Answer: Option C

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13. Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

(A) 9 : 1

(B) 17 : 1

(C) 23 : 1

(D) 29 : 1

Answer: Option B

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14. Nusselt number is related to the Reynolds number (Re) in turbulent & laminar flow respectively as

(A) Re^0.5, Re^0.8

(B) Re^0.8, Re^-0.5

(C) Re^0.8, Re^0.5

(D) Re^-0.8, Re^0.5

Answer: Option C

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15. Photographic plates are coated with

(A) Silver nitrate

(B) Silver halide

(C) Calcium silicate

(D) Metallic silver

Answer: Option B

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View All Answers

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

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