chemical engineering MCQs – Page 246

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 Review each marked answer and report any item that may be outdated or unclear.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
4901. The thermal emf-temperature relationship of most thermocouples is_________________?
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A. Square root

B. Linear

C. Exponential

D. Parabolic
4902. Thermodynamic Celsius scale of temperature measurement is________________?
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A. Defined on the basis of melting point of ice and evaporation temperature of water vapor

B. Defined on the basis of melting point of ice and condensation temperature of water vapor

C. Having an interval of 100 between ice point to steam point

D. Both B. and C.
4903. Water is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?
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A. Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature

B. Is a better neutron moderator as well

C. Require comparatively smaller pumps and heat exchanger for a given heat transfer rate

D. All A., B. and C.
4904. Which of the following may be used to measure the rate of nuclear disintegration ?
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A. Cyclotron

B. Mass spectrograph

C. Geiger-Muller Counter

D. Cold chamber

4905. Thorium-232 (a fertile material) on absorption of a neutron gets converted into ___________ , which is a fissile material?
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A. Plutonium-239

B. Thorium-233

C. Uranium-235

D. Uranium-233
4906. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?
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A. Increases exponentially

B. Increases

C. Decreases

D. Remain constant

4907. What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?
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A. 0.1

B. 13

C. 29

D. 3

4908. Fast breeder reactors do not____________________?
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A. Convert fertile material to fissile material

B. Use fast neutrons for fission

C. Use molten sodium as coolant

D. Use Th-232 as fissile fuel
4909. Which of the following is not a good moderating material ?
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A. All A., B. and C.

B. Boron

C. Concrete

D. 18/8 stainless steel

4910. The amount of a radioactive material (having a half life of 100 years) remaining after 400 years will be ______________ of its original weight?
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A. 4-Jan

B. 8-Jan

C. 1/16

D. 2-Jan

4911. Temperature control of an exothermic chemical reaction taking place in a CSTR is done with the help of cooling water flowing in a jacket around the reactor. The types of valve and controller action to be recommended are________________?
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A. Air to open valve with the controller direct acting

B. Air to close valve with the controller direct acting

C. Air to open valve with the controller indirect acting

D. Air to close valve with the controller indirect acting

4912. Routh stability method uses ______________ loop transfer function?
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A. Either A. or B.

B. Closed

C. Open

D. Neither A. nor B.

4913. Composition of natural gas is determined by the_________________?
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A. Haldane apparatus

B. Mass spectrometer

C. Chromatograph

D. Both B. and C.
4914. Thermal well made of _____________ gives the fastest speed of response, while measuring temperature by thermocouples?
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A. Inconel

B. Steel

C. Nichrome

D. Vycor (a glass)
4915. Thermal nuclear reactors using enriched uranium as fuel contains a maximum of ____________ percent fissile material i.e. U-235?
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A. 1

B. 2

C. 7

D. 3
4916. Bimetal strips are not used in________________?
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A. Thermocouples

B. Relays for opening & closing of electrical circuits

C. Bimetallic thermometers

D. Thermostats

4917. The term analogous to voltage in a single tank system is the_______________?
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A. Level of liquid

B. Liquid volume in the tank

C. Heat content of the system

D. Flow rate

4918. A manometer measures the _____________ pressure?
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A. Absolute

B. Atmospheric

C. Gauge

D. None of these

4919. Which of the following is artificially produced as it does not occur in nature ?
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A. Uranium-235

B. Uranium-233

C. Plutonium-239

D. Both B. and C.
4920. The electric power generation cost in nuclear power plant is less than that in a coal based thermal power plant, mainly because the________________?
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A. Maintenance cost of the former is less

B. None of these

C. Thermal efficiency of the former is higher

D. Fuel cost per unit power generated is less