Chemical Engineering Basics MCQ Questions & Answers

31

An "orange peel" effect is observed

A) As a defect during metal casting/ welding B) During deep drawing of metallic sheet having large grain size C) During faulty heat treatment of steel D) During extrusion of metal through a die

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Answer & Solution

Answer: Option B

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32

Pick out the wrong statement.

A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding B) Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded) C) In spot welding, two pieces to be joined are overlapped and placed between two electrodes D) Mild steel sheet can not be spot welded

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Answer & Solution

Answer: Option D

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33

The tensile strength of plastics ranges from __________ kg/mm².

A) 10 to 50 B) 50 to 100 C) 0.01 to 0.1 D) 0.1 to 10

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Answer & Solution

Answer: Option D

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34

Cobalt-60 is used as a source of __________ in medical therapy & industrial radiography.

A) X-rays B) $$\gamma $$-rays C) $$\alpha $$-rays D) $$\beta $$-rays

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Answer & Solution

Answer: Option B

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35

Device used as a standard for the calibration of pressure gauges is a

A) Bellow B) Diaphragm C) Dead weight pressure tester D) Mercury manometer

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Answer & Solution

Answer: Option C

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36

Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.

A) 80-120 B) 200-300 C) 600-800 D) 1000-1100

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Answer & Solution

Answer: Option B

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37

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

A) 550-600 B) 450-500 C) 350-400 D) 250-300

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Answer & Solution

Answer: Option C

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38

A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its

A) Aqueous tension B) Saturated humidity C) Vapor pressure D) Absolute humidity

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Answer & Solution

Answer: Option A

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39

Which of the following rays has the least wavelength?

A) Ultraviolet rays B) Infrared rays C) Cosmic rays D) X-rays

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Answer & Solution

Answer: Option C

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40

A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².

A) 6 B) 18 C) 38 D) 52

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Answer & Solution

Answer: Option B

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering