chemical engineering chemical engineering basics MCQs – Page 34

Practise multiple-choice questions from chemical engineering chemical engineering basics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering chemical engineering basics Mcqs
661. Nusselt number/Biot number varies___________________?
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A. Directly with thermal conductivity

B. Inversely with the dimension of the solid

C. Inversely with thermal conductivity

D. Directly with heat transfer co-efficient

662. Which of the following pairs is not correctly matched ?
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A. Number of nucleons : Mass number

B. Scattering: Absorption cross-section

C. Binding energy : Mass defect

D. Uranium 233 : Fertile material
663. While the oxy-acetylene flame produces a temperature of 3200C, the temperature produced by oxy-hydrogen flame is about _____________ C ?
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A. 1800

B. 3000

C. 2000

D. 2400

664. A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________?
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A. ?(Particle diameter)

B. (Particle diameter)3

C. Particle diameter

D. (Particle diameter)2

665. Calorific value of ____________________ are almost same?
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A. Petrol & diesel

B. Coal gas & natural gas

C. Lignite & anthracite coal

D. Lignite & coal gas

666. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the _____________ joint ?
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A. Butt

B. None of these

C. Lap

D. Welded

667. Out of the following, the lowest packing of atoms exists in ____________________ crystal lattice structure?
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A. Simple cubic

B. Body centred cubic (bcc)

C. Face centred cubic (fcc)

D. Hexagonal close, packed (hcp)

668. Atomic _______________ is a whole number for an element?
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A. Radius

B. Number

C. None of these

D. Weight

669. Internal energy of a gas obeying Van-Der-Waals equation of state, [p + (a/v2)] (V b) = RT, depends upon its___________________?
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A. Pressure & specific volume

B. Temperature only

C. Pressure & temperature

D. Temperature & specific volume

670. _________________ is not used as a material of construction in thermocouples ?
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A. Constantan

B. Rhodium

C. Duralumin

D. Alumel

671. Lead is poured into the joint between two ______________ pipes?
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A. Asbestos cement

B. Concrete

C. Mild steel

D. Cast iron
672. Electrostatic separation of minerals from each other is based on their differences in the following property ?
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A. Magnetic permeabilities

B. Electrical conductivities

C. Hardness

D. Densities

673. Triple point of water is__________________?
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A. 492R

B. 0K

C. -273C

D. 0.01 C
674. Which of the following materials does not form adherent oxide film on surface ?
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A. Nickel

B. Aluminium

C. Gold & silver

D. Copper

675. An abrupt and sudden fall in the reading of barometer is an indication of the____________________?
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A. Rain

B. Clear weather

C. Storm

D. Cold wave

676. Common salt is produced from sea water in India generally by the ________________ method?
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A. Solar evaporation

B. Electrolytic

C. Freeze drying

D. None of these

677. A form of stress corrosion failure termed as season cracking is generally observed in __________________?
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A. Brasses

B. Thermosetting polymers

C. High carbon steels

D. Borosilicate glasses

678. What is the percentage of chromium in 18-4-1 high speed steel ?
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A. 1

B. 4

C. 18

D. 23

679. Pick out the wrong statement ?
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A. rease in electron movement

B. With increase in temperature, the electrical conductivity of intrinsic semi-conductor will

C. Recrystallisation temperature decreases with decrease in strain in a cold worked metal

D. The electrical conductivity of gold is considerably reduced by alloying additions due to the

E. Lead can creep under its own weight at room temperature

680. With increase in temperature, the electrical conductivity of a _________________ decreases ?
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A. Metal or alloy

B. Dielectric

C. None of these

D. Semi-conductor