Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering Page-7 section-12

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61.
__________ are not emitted by radioactive substances.

A. α-rays

B. β-rays

C. Protons

D. Positrons

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62.
Addition of __________ to steel does not impart hardness.

A. Nickel

B. Copper

C. Chromium

D. Silicon

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63.
Pick out the wrong statement about nucleate boiling.

A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface

B. Surface temperature is greater than the saturation temperature of the liquid

C. Heat transfer from the surface of the liquid is less than that in film boiling

D. The temperature is less than that of film boiling

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64.
Pick out the correct statement about the condensation.

A. Filmwise condensation gives a lower heat transfer rate than the dropwise condensation

B. Suitable coating or vapour additive is used to promote film wise condensation

C. If a condensing liquid does not wet the surface dropwise, even then condensation will take place on it

D. Reynolds number of condensing liquid is based on its mass flow rate

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65.
Which of the following heat treatment processes is used for softening the hardened material?

A. Normalising

B. Tempering

C. Annealing

D. None of these

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66.
Large diameter shafts are manufactured by

A. Hot rolling

B. Cold drawing

C. Casting and turning to size

D. Forging and turning to size

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67.
Fatigue strength of a material can not be increased by

A. Cold working

B. Hot working

C. Shot peening

D. Any of these

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68.
The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

A. Red

B. Extended

C. Super

D. Extreme

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69.
The difference in the properties of a substance in three states of matter depends upon the

A. Binding energy of atoms

B. Difference in molecular shape

C. Difference in intermolecular forces

D. None of these

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70.
__________ circuit is most commonly used to measure strain with the help of a strain gauge.

A. Ballast

B. Voltage balancing potentiometric

C. Simple current sensitive

D. None of these

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering

61. __________ are not emitted by radioactive substances.

Answer & Solution

62. Addition of __________ to steel does not impart hardness.

Answer & Solution

63. Pick out the wrong statement about nucleate boiling.

Answer & Solution

64. Pick out the correct statement about the condensation.

Answer & Solution

65. Which of the following heat treatment processes is used for softening the hardened material?

Answer & Solution

66. Large diameter shafts are manufactured by

Answer & Solution

67. Fatigue strength of a material can not be increased by

Answer & Solution

68. The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

Answer & Solution

69. The difference in the properties of a substance in three states of matter depends upon the

Answer & Solution

70. __________ circuit is most commonly used to measure strain with the help of a strain gauge.

Answer & Solution

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61.
__________ are not emitted by radioactive substances.

62.
Addition of __________ to steel does not impart hardness.

63.
Pick out the wrong statement about nucleate boiling.

64.
Pick out the correct statement about the condensation.

65.
Which of the following heat treatment processes is used for softening the hardened material?

66.
Large diameter shafts are manufactured by

67.
Fatigue strength of a material can not be increased by

68.
The ability of tool steel to resist softening at high temperatures is termed as __________ hardness.

69.
The difference in the properties of a substance in three states of matter depends upon the

70.
__________ circuit is most commonly used to measure strain with the help of a strain gauge.