Chemical Engineering Basics MCQ Questions & Answers

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

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

84

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

A) 10 B) 30 C) 50 D) 80

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

85

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

A) Linearly B) Exponentially C) Logarithmically D) Inversely

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering