chemical engineering MCQs – Page 243

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 Review each marked answer and report any item that may be outdated or unclear.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

4841. The decrease in the atomic number is not observed in case of________________?
0

A. Positron emission

B. ?-emission

C. ?-emission

D. Electron capture

4842. ?-rays emission in radioactive disintegration is always accompanied by the emission of____________________?
0

A. Neutrons

B. None of these

C. ?-rays

D. ?-rays

4843. Radiation pyrometers as compared to thermocouples____________________?
0

A. Can measure higher temperature

B. Has a slower speed of response

C. Cant measure the temperature of moving objects

D. Is more affected by corrosive atmosphere

4844. Nuclear fuel usually used in a Boiling Water Reactor (BWR) is__________________?
0

A. Natural uranium

B. Enriched uranium

C. Thorium

D. Plutonium

4845. Working principle of mercury in glass thermometer is__________________?
0

A. Linear expansion

B. Pressure rise with temperature

C. None of these

D. Volumetric expansion

4846. Plutonium________________?
0

A. Is recovered from spent fuel from thermal nuclear reactor

B. Has much lower melting point (640C ) compared to thorium (1690C)

C. Both A. and B.

D. Neither A. nor B.

4847. The disintegration rate of a radioactive element _______________?
0

A. Remains constant throughout

B. Progressively decreases

C. Progressively increases

D. May increase or decrease depending on the material

4848. In ?-decay of radioactive material, the ratio of neutron to proton____________________?
0

A. Remain same

B. Increases

C. Is unpredictable; may increase or decrease

D. Decreases

4849. _____________ is an example of distributed parameter system ?
0

A. CSTR

B. Tubular reactor

C. On-off controller

D. None of these

4850. Non-metallic diaphragm used as pressure sensor in instruments is generally made of__________________?
0

A. Thick paper

B. Teflon

C. Bakelite

D. Synthetic rubber

4851. Number of poles in a system with transfer function 1/(s2 + 2s2 + 1) is ________________?
0

A. 1

B. 2

C. 5

D. 3

4852. The main ore of uranium is ______________________?
0

A. Monazite sand

B. Pitchblende

C. Cassiterite

D. Chalcopyrite

4853. Pyrometry refers to the measurement of temperature_________________?
0

A. With the mercurial thermometer upto 350C

B. Which is of higher magnitude

C. All A., B. & C.

D. Directly

4854. Heat is generated in a nuclear reactor (thermal) by_________________?
0

A. Fusion of atoms of uranium

B. Fission of U-235 by neutrons

C. Absorption of neutrons in uranium atoms

D. Combustion of a nuclear fuel e.g. uranium

4855. Ordinary mercury in glass thermometer is used for measuring temperature upto 120C. However, for measuring higher temperature upto __________ C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury?
0

A. 250

B. 700

C. 350

D. 550

4856. Primary purpose of a ____________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014neutrons/cm2 second?
0

A. Homogeneous

B. Breeder

C. Research

D. Power

4857. In the nuclear reaction, 93N239? 94Pu239 + ?; the missing particle is a/an__________________?
0

A. Proton

B. Electron

C. Neutron

D. Position

4858. Gain margin is equal to the_________________?
0

A. Gain in P-I controller

B. Gain in P controller

C. Amplitude ratio

D. Reciprocal of amplitude ratio

4859. Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an___________________?
0

A. Zirconia probe

B. Chromatograph

C. Orsat apparatus

D. Thermal conductivity cell

4860. Velocity of the thermal neutron (< 0.025 eV) used for fission of U-235 is around _____________ m/sec?
0

A. 1

B. 9 1021

C. 2200

D. 3 1011

Previous Next

Showing 4841 to 4860 of 8709 mcqs