chemical engineering MCQs – Page 348

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 Review each marked answer and report any item that may be outdated or unclear.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

6941. The crystal structure of most of the common metals is_____________________?
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A. Cubic

B. Orthorhombic

C. None of these

D. Hexagonal

6942. The general relationship between speed N, head H, power P and discharge Q for a centrifugal pump is_________________?
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A. Q?N : H?N2 : P?N3

B. Q?N3 : H?N : P?N2

C. Q?N : H?N3 : P?N2

D. Q?N2 : H?N3 : P?N

6943. Which of the following is the most prone to atmospheric corrosion ?
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A. Tin

B. Silver

C. Iron

D. Copper

6944. The lift of a balloon is_________________?
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A. Due to the weight of the atmospheric air, that it displaces

B. Increased, as it rises to a higher altitude

C. Not dependent on the temperature of the atmosphere

D. None of these

6945. Carbon is present in steel wholly in the__________________?
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A. Combined form

B. Free state as graphite

C. Both A. and B.

D. Neither A. nor B.

6946. In Newtons law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the ______________ of its diameter?
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A. First power

B. Second power

C. Inverse

D. Square root

6947. Bernoullis equation is dependent on the__________________?
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A. Third law of thermodynamics

B. None of these

C. Law of conservation of momentum

D. First law of thermodynamics

6948. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower_________________?
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A. Price

B. Thermal conductivity

C. Corrosion resistance

D. Abundant availability

6949. Wrought iron is having very high ________________?
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A. Susceptibility to changes in its properties by heat treatment

B. Hardness

C. Corrosion resistance

D. Strength

6950. In cold working of metal as compared to its hot working____________________?
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A. Yield stress, hardness and fatigue strength is not at all affected

B. Cracks and blow holes are eliminated

C. Appreciable strain hardening is produced

D. Ductility and impact strength improves

6951. N. second/m2 is___________________?
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A. Equivalent to one poise

B. The S.I. unit of kinematic viscosity

C. Equivalent to one stoke

D. The S.I. unit of dynamic viscosity

6952. German silver is an alloy of copper, nickel and________________?
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A. Zinc

B. Tin

C. Silver

D. Lead

6953. The head loss in turbulent flow in a pipe varies_________________?
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A. Inversely as the square of the diameter

B. Directly as the velocity

C. Approximately as the square of the velocity

D. Inversely as the square of the velocity

6954. It is possible to integrate an automatic flow controller to a________________?
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A. None of these

B. Flow nozzle

C. Venturimeter

D. Rotameter

6955. Cast iron compared to steel is better in__________________?
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A. Fluidity & castability

B. Malleability

C. Ductility

D. Strength

6956. When iron is rusted, it is__________________?
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A. None of these

B. Oxidised

C. Reduced

D. Converted to a fine powder

6957. Mild steel storage vessels are suitable for the storage of___________________?
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A. Sulphuric acid (25%)

B. Anhydrous ammonia

C. Hydrochloric acid (95%)

D. Fatty acids

6958. During ageing of fluid carrying pipes, the__________________?
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A. Friction factor increases linearly with time

B. Pipe becomes smoother with use

C. Absolute roughness decreases with time

D. Absolute roughness increases linearly with time

6959. When the head pumped against is less than the head of the fluid used for pumping, the usual device is a/an______________________?
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A. Injector

B. Blower

C. Ejector

D. Airlift

6960. The hydraulic radius for flow in a rectangular duct of cross-sectional dimension H, W is___________________?
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A. 2HW/(H + W)

B. HW/4 (H + W)2

C. ?(HW/?)

D. HW/2 (H + W)2

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