chemical engineering MCQs – Page 245

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 Review each marked answer and report any item that may be outdated or unclear.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

4881. The radioisotope used to study the thyroid gland is__________________?
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A. Iodine

B. Iron

C. Cobalt

D. Carbon

4882. In Bode plot, ? vs. ? is plotted on a/an ______________ graph paper?
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A. log-log

B. Triangular

C. Semi-log

D. Ordinary

4883. Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____________ percent of U-235 (i.e. fissile material)?
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A. 85

B. 65

C. 15

D. 45

4884. Unit of radioactivity is__________________?
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A. Angstrom

B. Barn

C. Fermi

D. Curie

4885. In a homogeneous nuclear reactor, the _____________ are mixed together?
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A. Fuel & coolant

B. Fuel & moderator

C. Coolant & moderator

D. None of these

4886. The level of a liquid under pressure can be determined using___________________?
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A. Air-trap system

B. Diaphragm box system

C. Differential pressure manometer

D. Bubbler system

4887. The pressure sensing element of elastic type pressure gauge is never made in the form of a_________________?
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A. Diaphragm

B. Strip

C. Bellow

D. Bourdon tube

4888. Polarisation of light forms the working principle of a______________?
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A. Polarograph

B. Polarimeter

C. Spectrometer

D. Chromatograph

4889. Thermocouple in a thermal well behaves as a true ________________?
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A. First order system

B. Second order system (underdamped)

C. Multiple first order system

D. Second order system (overdamped)

4890. Turbine flow meters are suitable for_________________?
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A. Very limited flow ranges

B. Cryogenic flow measurements

C. Aerospace and in air borne applications

D. Both B. and C.

4891. The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ?
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A. A

B. A + Z

C. Z

D. A Z

4892. The ratio of volume of an atom to that of its nucleus is__________________?
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A. 1012

B. 12-Oct

C. 8-Oct

D. 108

4893. Coolant used in a fast breeder reactor is____________________?
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A. Ordinary water

B. Heavy water

C. Helium

D. Molten sodium

4894. Heavy water has maximum density at ______________ C ?
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A. 18.6

B. 0

C. 11.6

D. 4

4895. A thermal nuclear reactor compared to a fast breeder reactor ?
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A. Requires less fuel to run at the same power level

B. Uses faster neutrons for fission

C. Uses slower neutrons for fission

D. Gives higher power density

4896. Liquid levels in autoclaves are measured by ________________?
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A. Differential float type manometer

B. Glass gauge

C. None of these

D. Simple float

4897. In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?
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A. Overdamped response

B. Unstable response

C. Underdamped response

D. Undamped response

4898. Ordinary water is not used as a moderator because, it___________________?
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A. Does not absorb neutrons

B. Has a low absorption cross-section

C. Has a low scattering cross-section

D. Absorbs neutrons

4899. The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________?
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A. 2

B. 0.5

C. 4

D. 1

4900. If response of a control system is to be free of offset and oscillation, the most suitable controller is_________________?
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A. Proportional-integral (PI) controller

B. Proportional controller

C. Proportional integral-derivative (PID) controller

D. Proportional-derivative (PD) controller

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