chemical engineering MCQs – Page 247

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

4921. Which is the most suitable instrument for measuring pressure below 3 microns ?
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A. Mcleod gauge

B. Ionisation gauge

C. Bourdon gauge

D. Alphatron

4922. Humidity of air can be determined by a__________________?
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A. Chromatograph

B. Sling psychrometer

C. Mass spectrometer

D. Polarimeter

4923. A negative gain margin expressed in decibels means a/an ____________ system?
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A. Unstable

B. None of these

C. Stable

D. Critically damped

4924. According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?
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A. 0

B. 45

C. 180

D. 90

4925. Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 1600C ?
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A. Photoelectric pyrometer

B. Thermocouples

C. Optical pyrometer

D. Radiation pyrometer

4926. Final product of uranium extraction plant at Jadugoda (Bihar) is________________?
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A. Uranium

B. Uranium carbide

C. Uranium oxide

D. Magnesium diuranate

4927. Out of the following places, a nuclear power plant is not located at______________?
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A. Kaiga (Karnataka)

B. Rawatbhata (Rajasthan)

C. Kalpakkam (Tamilnadu)

D. Talcher (Orissa)

4928. Isotopes of an element have different_____________________?
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A. Nuclear charge

B. Electronic configuration

C. Chemical properties

D. Mass number

4929. ____________ are analysed using a Polarograph?
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A. Isotonic solutions

B. Gases

C. Liquids

D. Solids

4930. Net efficiency of ordinary light water cooled nuclear reactor is about _____________ percent?
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A. 32

B. 88

C. 72

D. 52

4931. Water is entering a storage tank at a temperature T0 and flow rate Q0 and leaving at a flow rate Q and temperature T. There are negligible heat losses in the tank. The area of cross-section of the tank is A0. The model that describes the dynamic variation of temperature of water in the tank with time is given as________________?
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A. Q0T0 QT = Ac . h (dT/dt)

B. Q(T0 T) = Ac . h (dT/dt)

C. Q0(T0 T) = Ac . h (dT/dt)

D. Q(T0 T) = Ac . (dTH/dt)

4932. Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?
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A. Carbon tetrachloride

B. Ethylene glycol

C. Paraffin

D. Water

4933. Quantity of fissionable material (i.e. U-235) in natural uranium is _____________ percent?
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A. 99.29

B. 0.71

C. 6.31

D. 12.73

4934. A magnetic flowmeter is_________________?
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A. Based on the linear relationship between the fluid flow rate and the induced voltage

B. Capable of measuring the flow rate of slurries and electrolytes

C. All A., B. and C.

D. Based on the principle of Faradays law

4935. Cascade control means _______________?
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A. On-off control

B. More than one feed-back loop

C. Feed forward control

D. One feed-back loop

4936. Sodium melts (at atmospheric pressure) at a temperature of ____________ C?
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A. 98

B. 588

C. 58

D. 348

4937. A moderator _____________ the neutrons?
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A. Slows down

B. Reflects

C. Absorbs

D. Accelerates

4938. Minute depression of freezing point of a liquid solvent on addition of a solid solute can be best measured by a________________?
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A. Bimetallic thermometer

B. Beckman thermometer

C. Dilatometer

D. Mercury thermometer

4939. Mcleod gauge measures the _____________ pressure?
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A. Very high

B. Atmospheric

C. Sub-atmospheric

D. Positive

4940. Liquid column manometers are used for measuring the pressure ______________ kgf/cm2?
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A. < atmospheric

B. < 3 (gage)

C. < 10 (gage)

D. > 2 (gage)

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