chemical engineering Mcqs
4951. Which of the following nuclear materials is fissile ?
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A. Plutonium-239

B. None of these

C. Thorium-232

D. Uranium-238

4953. Bourdon tube is never made of________________?
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A. Cast iron

B. Stainless steel

C. Phosphor bronze

D. Monel metal

4954. Which of the following cannot measure a temperature of 1600C ?
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A. Platinum resistance thermometer

B. Radiation pyrometer

C. Photo-electric pyrometer

D. Thermocouple

4955. Which of the following instruments is not used for measuring sub-zero (<0) temperatures ?
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A. Platinum resistance thermometer

B. Vapor pressure thermometer

C. Mercury in glass thermometer

D. Radiation pyrometer
4956. Which of the following is not classified as a thermo electric pyrometer ?
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A. Radiation pyrometer

B. Thermocouple

C. Resistance thermometer

D. Optical pyrometer (disappearing filament type)
4957. A homogeneous reactor is the one, in which the___________________?
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A. All A., B. and C.

B. The fuel and the moderator is mixed to form a homogeneous material

C. Same substance (e.g. heavy water) is used as moderator & coolant

D. Fissile atoms are evenly distributed throughout the mass of nuclear reactor

4959. Which of the following measurements can be made by the measurement of emf ?
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A. pH value

B. Composition of complex ions

C. All A., B. & C.

D. Degree of hydrolysis

4960. In second order underdamped system ?
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A. Decay ratio = (overshoot)2

B. Decay ratio = overshoot

C. Overshoot increases for increasing damping co-efficient

D. Large damping co-efficient means smaller damping

4962. The open loop transfer function of a control system is KR/(1 + TS). This represents ______________?
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A. Dead time system

B. A first order system

C. A second order system

D. A first order time lag

4964. An ideal coolant for a nuclear reactor should ________________?
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A. Have high density, but low heat transfer co-efficient

B. Be capable of attaining high temperature, only when it is pressurised

C. Be a good absorber of neutrons

D. Be free from radiation damage and non-corrosive
4966. The phenomenon of radioactivity was discovered by___________________?
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A. Madam Curie

B. Roentgen

C. J.J. Thomson

D. Becquerel
4968. Molten sodium is used as a coolant in a fast breeder reactor, because of its_________________?
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A. Faster heat removal capability from the core

B. Neutron breeding capability

C. Excellent moderating properties

D. Capability to increase the reaction rate in the core

4969. The term analogous to the electrical current in a thermal system is the_________________?
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A. Temperature difference

B. None of these

C. Heat content in the system

D. Heat flow rate
4970. Continuous measurement of specific gravity of a liquid is done by __________________?
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A. Hydrometer

B. Contact-type electric indicators

C. Displacement meter

D. Both A. and C.
4971. Atoms of U-238 and U-235 differ in structure by three_____________________?
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A. Protons

B. Electrons

C. Electrons and three protons

D. Neutrons
4973. Fuel for a fast breeder reactor is_________________?
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A. Neptunium

B. Plutonium

C. Radium

D. Uranium

4974. The transfer function for a P-D controller is________________?
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A. Kc ?D s

B. Kc(1+?D s)

C. Kc(1 +1/?D s)

D. Kc/?D s

4975. The phenomenon of nuclear fission is opposite to that of__________________?
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A. Combustion

B. Thermionic emission

C. Radioactive decay

D. Nuclear fusion
4977. Unit of radioactivity is_________________?
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A. Barn

B. Fermi

C. Angstrom

D. Curie
4979. Working principle of radiation pyrometer is based on the __________________?
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A. Kirchoffs law

B. Seebeck effect

C. Stefan Boltzmann law

D. Wiens law

4980. Gas analysis is commonly done using the___________________?
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A. X-ray diffraction

B. Emission spectrometer

C. Mass spectrometer

D. Thermal conductivity cell
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

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

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

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

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

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

B. Bimetallic

C. Mercury in glass

D. Resistance