chemical engineering MCQs – Page 351

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 Review each marked answer and report any item that may be outdated or unclear.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
7001. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of ______________ pressure?
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A. Absolute

B. Atmospheric

C. Gage

D. Small differential
7002. Which of the following is not an alloy of copper ?
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A. Pewter metal

B. Admiralty gun metal

C. German silver

D. Muntz metal

7003. Which of the following has a very high carbide forming tendency in steels ?
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A. Nickel

B. Chromium

C. Silicon

D. Vanadium
7004. Which is not a variable head meter _________________?
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A. Pitot tube

B. Venturimeter

C. None of these

D. Rotameter
7005. High specific speed of a pump implies that, it is a/an _____________ pump?
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A. Centrifugal

B. None of these

C. Mixed flow

D. Axial flow
7006. A metallic alloy in which one of the constituent metal is _____________, is called an amalgam?
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A. Lead

B. Tin

C. Mercury

D. Zinc

7007. Presence of cobalt in steel improves its____________________?
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A. Cutting ability

B. None of these

C. Tensile strength

D. Corrosion resistance

7008. In the low Reynolds number region, the drag force on a sphere is proportional to_______________?
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A. V0.5

B. V2

C. V

D. V4

7009. Location of vena-contracta in an orificemeter does not depend upon the________________?
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A. Ratio of pipe diameter to orifice diameter

B. Density, viscosity & compressibility of the fluid

C. Pipe roughness

D. Type of orifice
7010. Which of the following comprises of hydrocarbons ?
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A. Rubber

B. None of these

C. Mica flakes

D. Glass

7011. For laminar flow through a closed conduit____________________?
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A. Vmax = 0.5Vav

B. Vmax = 1.5Vav

C. Vmax = Vav

D. Vmax = 2Vav
7012. Gun metal is an alloy of_________________________?
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A. Manganese, phosphorus and nickel

B. Copper, phosphorus and nickel

C. Copper, tin and zinc

D. Nickel, tin and copper

7013. For water, when the pressure increases, the viscosity_________________?
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A. Remain constant

B. First decreases, and then increases

C. Decreases

D. Also increases

7014. Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
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A. Increase

B. Increase or decrease depending on the pipe material

C. Decrease

D. Remain unchanged

7015. Nitriding of steel is a process for________________?
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A. Spheroidising

B. Annealing

C. Case hardening

D. Normalising

7016. Glass lined vessels are not used for handling__________________?
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A. Dilute HCI

B. Hydrofluoric acid

C. Dilute HNO3

D. Dilute H2SO4

7017. Most suitable material for high pressure vessel operating at 500 atm. and 500 C is__________________?
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A. 18/8 stainless steel

B. Mild steel

C. High silicon iron (14% Si)

D. Molybdenum stainless steel
7018. Coke oven walls are lined with _____________ bricks?
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A. Low thermal conductivity

B. Silica

C. Tar-dolomite

D. Fire clay

7019. Platinum and silver are corroded by___________________?
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A. None of these

B. Sulphuric acid (10%)

C. Phosphoric acid

D. Caustic soda solution

7020. _____________ is added in stainless steel to prevent inter crystal corrosion?
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A. Niobium

B. Chromium

C. Nickel

D. Vanadium