MCQs

Chemical Engineering MCQs with Explanations

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3821Chemical EngineeringMedium

Highest cutting speed is achieved by the ________ tool material?

ACast alloy

BPlain carbon steel

CHigh speed steel

DCarbide

Correct answer

D. Carbide

Explanation

The correct answer is Carbide.

3822Chemical EngineeringMedium

In a backward feed multiple effect evaporator ________?

AFeed is introduced in the first effect

BNo pumps are required between successive effects

CFeed flows from low pressure to high pressure

DNone of these

Correct answer

C. Feed flows from low pressure to high pressure

Explanation

The correct answer is Feed flows from low pressure to high pressure.

3823Chemical EngineeringMedium

Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the________?

AVelocity of the fluid

BDensity of the fluid

CDiameter of the pipe

DLength of the pipe

Correct answer

D. Length of the pipe

Explanation

The correct answer is Length of the pipe.

3824Chemical EngineeringMedium

Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)?

AV/nRT

BnRT/P

CP/nRT

DnRT/V

Correct answer

A. V/nRT

Explanation

The correct answer is V/nRT.

3825Chemical EngineeringMedium

Gratings is associated with the measurement of________?

ALinear displacement

BSurface texture

CConcavity/convexity

DFlatness

Correct answer

A. Linear displacement

Explanation

The correct answer is Linear displacement.

3826Chemical EngineeringMedium

Except for monatomic gases, the molal heat capacity at constant volume for all gases is ________ Kcal/Kg mole.° K?

A< 1

Correct answer

B. 3

Explanation

The correct answer is 3.

3827Chemical EngineeringMedium

A pipe is defined as ‘hydraulically smooth’, if the friction factor________?

ANone of these

BFor a given Reynolds number remains constant even on further smoothening of the pipe

CIs zero irrespective of the Reynolds number

DIs not a function of Reynolds number

Correct answer

B. For a given Reynolds number remains constant even on further smoothening of the pipe

Explanation

The correct answer is For a given Reynolds number remains constant even on further smoothening of the pipe.

3828Chemical EngineeringMedium

A coal with high ash content________?

AHas low quantity of mineral matter

BIs harder and stronger

CIs not subjected to washing

DHas higher calorific value

Correct answer

B. Is harder and stronger

Explanation

The correct answer is Is harder and stronger.

3829Chemical EngineeringMedium

Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to________?

AG1.5

BG0.8

CG0.2

DG0.5

Correct answer

B. G0.8

Explanation

The correct answer is G0.8.

3830Chemical EngineeringMedium

Fresh sewage is ________ in nature?

AAcidic

BHighly acidic

CNeutral

DAlkaline

Correct answer

D. Alkaline

Explanation

The correct answer is Alkaline.

A pipe is defined as ‘hydraulically smooth’, if the friction factor________?

ANone of these

BFor a given Reynolds number remains constant even on further smoothening of the pipe

CIs zero irrespective of the Reynolds number

DIs not a function of Reynolds number

Correct answer

B. For a given Reynolds number remains constant even on further smoothening of the pipe

Explanation

The correct answer is For a given Reynolds number remains constant even on further smoothening of the pipe.