chemical engineering MCQs – Page 341

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 Review each marked answer and report any item that may be outdated or unclear.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
6801. __________________ does not contain copper as an alloying element?
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A. Manganin

B. Monel metal

C. Perminvar

D. Nichrome
6802. The specific gravity of coal depends mainly on its ______________ content?
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A. Moisture

B. Volatile matter

C. Ash

D. Carbon

6803. Presence of nitrogen in steel___________________?
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A. Increases its hardness

B. Increases its strength

C. Is desirable

D. Makes it brittle
6804. Transition from laminar flow to turbulent flow is aided by the__________________?
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A. Pressure gradient and the compressibility of the flowing medium

B. All A., B. & C.

C. Surface roughness and curvature (i.e. sharp corners)

D. Vibration

6805. Sound waves propagation in air exemplifies an ______________ process?
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A. None of these

B. Adiabatic

C. Isothermal

D. Isometric

6806. In the reaction; N2 + O2 ? 2NO, increasing the pressure will result in_________________?
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A. Shifting the equilibrium towards right

B. Shifting the equilibrium towards left

C. None of these

D. No change in equilibrium condition
6807. ______________ iron is produced, when molten pig iron is allowed to cool gradually?
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A. Wrought

B. Grey cast

C. White cast

D. None of these

6808. Which of the following is the most widely used insulating material for steam carrying pipelines ?
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A. Vermiculite

B. Glass wool and 85% magnesia

C. Slag wool

D. Ceramic fibre blanket

6809. Navier-Stokes equation is useful in the analysis of _____________ fluid flow problems?
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A. Rotational

B. Turbulent

C. Non-viscous

D. Viscous
6810. The fluid jet discharging from a 2? diameter orifice has a diameter of 1.75? at its venacontracta. The co-efficient of contraction is___________________?
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A. None of these

B. 1.3

C. 0.766

D. 0.87

6811. Multistage centrifugal pumps are generally used for________________?
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A. High head

B. Low head but high discharge

C. Slurries of high solid concentration

D. Highly viscous liquid

6812. Permanent pressure loss in a well designed Venturimeter is about _____________ percent of the venturi differential?
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A. 10

B. 50

C. 30

D. 1

6813. To improve the machinability of steel by its softening, it is subjected to __________________?
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A. Shot blasting

B. Annealing

C. Cold working

D. Heating

6814. The friction factor for turbulent flow in a hydraulically smooth pipe______________?
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A. Depends on the roughness

B. None of these

C. Depends only on Reynolds number

D. Does not depend on Reynolds number

6815. The unit of bulk modulus of elasticity for a liquid in S.I. unit is____________________?
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A. N/m2

B. N/m

C. N/m3

D. N

6816. Efficiency of power transmission (?) through a circular pipe is given by (ht hf)/ht, which has a maximum value of _____________ percent?
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A. 88.8

B. 33:03:00

C. 50

D. 66.6
6817. High speed steel tools retain their hardness upto a temperature of _____________ C?
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A. 900

B. 750

C. 1100

D. 500

6818. Aqueous nitric acid is stored in ______________ vessel?
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A. Plain carbon steel

B. Stainless steel

C. Thermosetting plastic material

D. Cast iron
6819. In fluid flow, the stagnation point is defined as a point, where the _____________ is zero?
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A. All A., B. and C.

B. Pressure

C. Flow velocity

D. Total energy

6820. Chilled iron castings are__________________?
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A. Easily machinable

B. None of these

C. Soft on surface

D. Highly wear resistant