Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering Page-9 section-5

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81.
Pick out the wrong statement.

A. Lead can creep under its own weight at room temperature

B. The electrical conductivity of gold is considerably reduced by alloying additions due to the decrease in electron movement

C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal

D. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will increase

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82.
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

A. Copper

B. Steel

C. Aluminium

D. Brass

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83.
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

A. Copper

B. Steel

C. Aluminium

D. Brass

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84.
A high pressure boiler generates steam at a pressure greater than __________ kg/cm².

A. 10

B. 30

C. 50

D. 80

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85.
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

A. Linearly

B. Exponentially

C. Logarithmically

D. Inversely

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86.
Electrochemical corrosion occurs

A. Where the liquid electrolytes containing free ions are present

B. Only in alloys

C. Only in pure metals

D. Due to direct chemical action of metal with oxygen

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87.
The Al₂O₃ content of cryolite in Hall-Heroult's cell is maintained between __________ percent.

A. 2 - 5

B. 18 - 20

C. 12 - 15

D. 6 - 12

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88.
'End cooler' or 'after cooler' is employed in air compressor mainly to

A. Remove oil vapour or moisture from air

B. Cool the dry air before use

C. Reduce the volumetric capacity of receiver

D. None of these

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89.
Cathodic protection is widely used in controlling corrosion in

A. High pressure vessels

B. Marine structure & underground pipelines

C. Overhead fuel gas pipelines

D. Overhead water pipelines

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90.
The hardness of the lathe bed material is measured by the

A. Shore sceleroscope

B. Brinnel hardness tester

C. Vicker's hardness tester

D. Rockwell hardness tester

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering

81. Pick out the wrong statement.

Answer & Solution

82. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

Answer & Solution

83. Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

Answer & Solution

84. A high pressure boiler generates steam at a pressure greater than __________ kg/cm2.

Answer & Solution

85. For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

Answer & Solution

86. Electrochemical corrosion occurs

Answer & Solution

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

Answer & Solution

88. 'End cooler' or 'after cooler' is employed in air compressor mainly to

Answer & Solution

89. Cathodic protection is widely used in controlling corrosion in

Answer & Solution

90. The hardness of the lathe bed material is measured by the

Answer & Solution

Read More Section(Chemical Engineering Basics)

81.
Pick out the wrong statement.

82.
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

83.
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.

84.
A high pressure boiler generates steam at a pressure greater than __________ kg/cm².

85.
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

86.
Electrochemical corrosion occurs

87.
The Al₂O₃ content of cryolite in Hall-Heroult's cell is maintained between __________ percent.

88.
'End cooler' or 'after cooler' is employed in air compressor mainly to

89.
Cathodic protection is widely used in controlling corrosion in

90.
The hardness of the lathe bed material is measured by the