chemical engineering MCQs – Page 232

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 Review each marked answer and report any item that may be outdated or unclear.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

4621. Pick out the wrong unit conversion of heat transfer co-efficient?
0

A. 1 BTU/ft2.hr.F = 4.88 kcal/m2.hr.C = 20.44 kJ/m2.hrC = 5.678 W/m2.C

B. 1 W/m2.C = 0.1761 BTU/ft2.hr.F.

C. 1 kcal/m2.hr.K = 1.163 W/m2.C

D. 1 kcal/m2.hr.C = 0.2048 BTU/ft2.hr. F. = 1.163 W/m2.K

4622. Operating range of a temperature measuring instrument is 800 to 1600C. It could be a/an _____________ pyrometer?
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A. Photoelectric

B. Optical

C. None of these

D. Radiation

4623. Solution made by dissolving equimolar amounts of different solutes in the same amount of a given solvent will have the______________________?
0

A. Elevation in boiling point in the ratio of their molecular weights

B. Different elevation in boiling point

C. None of these

D. Same elevation in boiling point

4624. Which equation is not an equation of state ?
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A. (P + a/V2)(V-b) = RT

B. p = [RT/(V b)] (a/TV2)

C. PV = RT + B/V + y/V2 + .

D. loge (p/p0) = (?/R) (1/T0 1/T)

4625. The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter D. and shape & number of corrugations. Its deflection is proportional to_______________?
0

A. d2

B. d3

C. d4

D. d

4626. A non-linear system will have _____________ steady state values?
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A. Two

B. More than one

C. One

D. Three

4627. Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an ________________?
0

A. Magnetic flow meter

B. Orificemeter

C. Hot wire anemometer

D. Venturimeter

4628. The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are__________________?
0

A. 6.02 1023

B. 1.20 1024

C. 3.01 1022

D. 9.03 1024

4629. Emf generated in a thermocouple depends on the temperature ___________________?
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A. Difference between cold junction and atmospheric temperature

B. Of hot junction only

C. Of cold junction only

D. Difference between hot and cold junctions

4630. The time constant of a first order process with resistance R and capacitance C is__________________?
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A. RC

B. R + C

C. R C

D. 1/RC

4631. ____________ is the static characteristics of an instrument?
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A. Drift

B. Dynamic error

C. Response

D. Tine lag

4632. Nitrogen gas constant volume thermometer is suitable for measuring a temperature of _____________ C?
0

A. 0-100

B. < 0

C. > 100

D. > 50

4633. Which of the following expressions defines the Baume gravity scale for liquids heavier than water ?
0

A. 200 (G-1)

B. 145 (145/G)

C. (141.5/G) 131.5

D. (400/G) 400

4634. In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the ____________ variable?
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A. None of these

B. Controlled

C. Load

D. Manipulated

4635. Thermal conductivity cell is the primary element of a/an _____________ analyser?
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A. Carbon dioxide

B. Oxygen

C. Carbon monoxide

D. Sulphur dioxide

4636. The inverse Laplace transform of the function f(S) = 1/S (1 + S) is_________________?
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A. 1 + et

B. 1 + e-t

C. 1 e-t

D. 1 et

4637. E.m.f. generated by thermocouples is of the order of ________________?
0

A. Milli volts

B. Volts

C. Micro volts

D. Kilo volts

4638. Thermistors are used in ____________ devices?
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A. Voltage measuring

B. Temperature measuring

C. Temperature compensating

D. Both B. & C.

4639. One Newton is equal to ______________ dynes?
0

A. 105

B. 104

C. 103

D. 102

4640. A constant volume gas thermometer employing ______________ is used to measure sub-zero (i.e., < 0C) temperature?
0

A. Hydrogen

B. None of these

C. Helium

D. Nitrogen

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