chemical engineering MCQs – Page 250

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 Review each marked answer and report any item that may be outdated or unclear.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
4981. Fuel for a nuclear reactor (thermal) is___________________?
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A. Radium

B. Plutonium

C. None of these

D. Uranium
4982. Liquid metal (e.g., molten sodium) is preferred as a coolant in case of a/an ______________ reactor?
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A. Graphite moderated

B. Fast breeder

C. Homogeneous

D. Enriched uranium (3% U-235) fuelled

4983. Mass of a positron is same as that of a/an__________________?
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A. Electron

B. Neutron

C. Proton

D. ?-particle

4984. Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of___________________?
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A. Zircaloy

B. Molybdenum

C. Boron or cadmium

D. High carbon steel

4985. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?
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A. O2

B. NO

C. CO2

D. NO2

4986. A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is _______________ criterion?
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A. None of these

B. Bode stability

C. Nyquist

D. Routh stability

4987. In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the _____________ variable?
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A. Load

B. Manipulated

C. Controlled

D. None of these

4988. Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ?
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A. Bimetallic thermometer

B. Mercury thermometer

C. Thermocouple

D. Radiation pyrometer

4989. In a nuclear explosion, the energy is released primarily in the form of _____________ energy?
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A. Thermal

B. Potential

C. Kinetic

D. Electrical

4990. Neutrons have mass approximately equal to that of _____________ atoms?
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A. Deuterium

B. Hydrogen

C. Helium

D. None of these

4991. Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their ?
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A. Low electrical conductivity

B. Low flash point

C. Low thermal conductivity

D. High viscosity index

4992. Percentage of heavy water in ordinary water is around__________________?
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A. 32.97

B. 0.015

C. 0.71

D. 7.54

4993. Load cells are used for the measurement of __________________?
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A. Weight

B. Velocity

C. Stress

D. Strain

4994. Thorium can be converted into U-233 in a _____________ reactor?
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A. Fast breeder

B. Swimming pool

C. Liquid metal cooled

D. Thermal

4995. All the thermocouples used for temperature measurement use dissimilar metal ________________?
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A. Wires

B. Beads

C. Strips

D. Bars

4996. Solar energy results from _______________ reaction?
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A. None of these

B. Fission

C. Thermonuclear

D. Combustion

4997. A control rod________________?
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A. Should have small absorption cross-section

B. Is generally made of boron, hafnium or cadmium

C. Should have large absorption cross-section

D. Both B. and C.
4998. Moderating material used in a thermal-reactor should be a ____________________?
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A. None of these

B. Good absorber of neutrons

C. Poor absorber of neutrons

D. Solid substance

4999. Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about ______________ micro mho/cm3?
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A. 1

B. 50

C. 10

D. 100

5000. _______________ thermometer cannot measure sub-zero (< 0 C) temperature ?
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A. Vapor pressure

B. Bimetallic

C. Mercury in glass

D. Resistance