Chemical Engineering Basics MCQ Questions & Answers

21

Parallel straight line pattern of temperature distribution for both hot and cold fluids is observed in case of heat exchanger of the type

A) Parallel flow with equal heat capacities B) Counter flow with equal heat capacities C) Counter flow with unequal heat capacities D) Parallel flow with unequal heat capacities

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Answer & Solution

Answer: Option B

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22

Source of heat supply in a cupola is

A) Coke B) Charcoal C) Lumpy coal D) Pulverised coal

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Answer & Solution

Answer: Option A

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23

Which of the following is an example of cathodic protection of metals against corrosion ?

A) Painted steel B) Galvanised iron C) Case hardened steel D) Lead lined reactor

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Answer & Solution

Answer: Option B

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24

Pipelines carrying various utilities in chemical industries are identified by their colour codes. The color of pipeline carrying steam is

A) Black B) Silver grey C) Green D) Yellow

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Answer & Solution

Answer: Option B

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25

The basic function of the drum in a boiler is to

A) Act as a storage for feed water B) Act as a storage for steam C) Separate steam from water D) Remove settling impurities from steam

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Answer & Solution

Answer: Option C

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26

Unit of viscosity in CGS system is

A) gm.cm^-1.sec^-1 B) gm.cm².sec^-2 C) gm.cm^-2.sec^-1 D) gm.cm.sec^-1

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Answer & Solution

Answer: Option A

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27

Buoyancy force depends on the __________ the liquid.

A) Depth of immersion in B) Displaced mass of C) Surface tension of D) Viscosity of

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Answer & Solution

Answer: Option B

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28

Which one is neutral in character?

A) N₂O₄ B) N₂O C) N₂O₅ D) N₂O₃

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Answer & Solution

Answer: Option B

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29

What is the effect on the performance of the economiser in the thermal power plant boiler, if the feed water temperature is very low due to preheaters being out for repairs or starving of steam supply ?

A) It results in corrosion due to the condensation on the flue gas side of the economiser tubes due to handling of low temperature water B) Economiser tube life increases due to handling of low temperature water C) Heat transfer efficiency of economiser increases due to picking up high heat from the flue gases D) Scale formation rate on economiser tubes increases

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Answer & Solution

Answer: Option A

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30

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A) Gr^0.25, Gr B) Gr^0.25, Gr^0.33 C) Gr, Gr^0.25 D) Gr^0.33, Gr^0.25

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Answer & Solution

Answer: Option A

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering