MCQs

Mechanical Engineering MCQs with Explanations

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831Mechanical EngineeringMedium

An engine indicator is used to determine the following________?

ABHP

Btemperature

Cm.e.p. and I.H.P.

Dvolume of cylinder

Espeed

Correct answer

C. m.e.p. and I.H.P.

Explanation

The correct answer is m.e.p. and I.H.P..

832Mechanical EngineeringMedium

The evolution of heat of solution takes place in ammonia absorption plant when ________?

Aammonia vapour is driven out of solution

Bammonia vapour goes into solution

Clithium bromide is driven out of solution

Dlithium bromide mixes with ammonia

Eweak solution mixes with strong solution

Correct answer

B. ammonia vapour goes into solution

Explanation

The correct answer is ammonia vapour goes into solution.

833Mechanical EngineeringMedium

In vapor compression cycle, the condition of refrigerant is very wet vapor________?

Abefore entering the expansion valve

Bbefore entering the compressor

Cafter passing through the condenser

Dbefore passing through the condenser

Eafter passing through the expansion or throttle valve

Correct answer

B. before entering the compressor

Explanation

The correct answer is before entering the compressor.

834Mechanical EngineeringMedium

In the case of steady flow of a fluid, the acceleration of any fluid particle is________?

Azero

Bconstant

Cvariable

Dzero under limiting conditions

Enever zero

Correct answer

A. zero

Explanation

The correct answer is zero.

835Mechanical EngineeringMedium

Which of the following engines can work on very lean mixture________?

Atwo stroke engine

BS.I. engine

Call of the above

DC.I. engine

Efour stroke engine

Correct answer

D. C.I. engine

Explanation

The correct answer is C.I. engine.

836Mechanical EngineeringMedium

The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of________?

A0.25

B0.55

C0.65

D0.45

E0.75

Correct answer

E. 0.75

Explanation

The correct answer is 0.75.

837Mechanical EngineeringMedium

Enriched uranium is one in which________?

A%age of U has been artificially increased

B%age of U235 has been artificially in-creased

Cextra energy is pumped from outside

Dall impurities have been removed

E%age of U234 has been artificially in-creased

Correct answer

B. %age of U235 has been artificially in-creased

Explanation

The correct answer is %age of U235 has been artificially in-creased.

838Mechanical EngineeringMedium

Reactors designed for propulsion applications are designed for________?

Aany type of uranium

Bnone of the above

Cnatural uranium

Dpure uranium

Eenriched uranium

Correct answer

E. enriched uranium

Explanation

The correct answer is enriched uranium.

839Mechanical EngineeringMedium

Critical pressure of a liquid is the pressure________?

Aabove which liquid becomes gas

Babove which liquid becomes vapour

Cabove which liquid becomes solid

Dat which all the three phases exist together

Eabove which liquid will remain liquid

Correct answer

E. above which liquid will remain liquid

Explanation

The correct answer is above which liquid will remain liquid.

840Mechanical EngineeringMedium

Plutonium-239 is produced________?

Aas basic raw material

Bby neutron irradiation of thorium

Cby neutron irradiation of IT*

Din high capacity furnaces

Eartificially

Correct answer

C. by neutron irradiation of IT*

Explanation

The correct answer is by neutron irradiation of IT*.

The evolution of heat of solution takes place in ammonia absorption plant when ________?

Aammonia vapour is driven out of solution

Bammonia vapour goes into solution

Clithium bromide is driven out of solution

Dlithium bromide mixes with ammonia

Eweak solution mixes with strong solution

Correct answer

B. ammonia vapour goes into solution

Explanation

The correct answer is ammonia vapour goes into solution.

In vapor compression cycle, the condition of refrigerant is very wet vapor________?

Abefore entering the expansion valve

Bbefore entering the compressor

Cafter passing through the condenser

Dbefore passing through the condenser

Eafter passing through the expansion or throttle valve

Correct answer

B. before entering the compressor

Explanation

The correct answer is before entering the compressor.

Enriched uranium is one in which________?

A%age of U has been artificially increased

B%age of U235 has been artificially in-creased

Cextra energy is pumped from outside

Dall impurities have been removed

E%age of U234 has been artificially in-creased

Correct answer

B. %age of U235 has been artificially in-creased

Explanation

The correct answer is %age of U235 has been artificially in-creased.

Critical pressure of a liquid is the pressure________?

Aabove which liquid becomes gas

Babove which liquid becomes vapour

Cabove which liquid becomes solid

Dat which all the three phases exist together

Eabove which liquid will remain liquid

Correct answer

E. above which liquid will remain liquid

Explanation

The correct answer is above which liquid will remain liquid.