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ISRO Technical Assistant Mechanical 2019
25

ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key

25) Otto cycle consists of following four processes

Two isothermal and two isentropics

Two isentropics and two constant volumes

Two isentropics, one constant volume and one constant pressure

Two isentropics and two constant pressures

Answer is:

Two isentropics and two constant volumes

Explanation:

Otto cycle consists of two isentropics and two constant volume processes.

Otto cycle consists of following four processes

ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key

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26) In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

High, of the order of 25 degree

As low as possible (3 to 11 degree centigrade)

Zero

Any value

Answer is:

As low as possible (3 to 11 degree centigrade)

27) Water boils when its vapour pressure

Equals that of the surroundings

Equals 760 mm of mercury

Equals to atmoshperic pressure

Equal to pressure of water in the container

Answer is:

Equals that of the surroundings

28) For finding out the bending moment for the arm ( spoke) of flywheel, the arm is assumed as

A cantilever beam fixed at the rim and subjected to tangential force at the hub

A simply supported beam fixed at hub and rim and carrying uniformly distributed load

A cantilever beam fixed at the hub and subjected to tangential force at the rim

A fixed beam fixed at hub and rim and carrying uniformly distributed load

Answer is:

A cantilever beam fixed at the hub and subjected to tangential force at the rim

29) When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under

Tensile Stress

Compressive Stress

Shear Stress

Bending Stress

Answer is:

Shear Stress

ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key

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25) Otto cycle consists of following four processes

Two isentropics and two constant volumes

ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key

Related ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key

26) In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be

As low as possible (3 to 11 degree centigrade)

27) Water boils when its vapour pressure

Equals that of the surroundings

28) For finding out the bending moment for the arm ( spoke) of flywheel, the arm is assumed as

A cantilever beam fixed at the hub and subjected to tangential force at the rim

29) When a shaft is subjected to a twisting moment, every cross-section of the shaft will be under

Shear Stress

ISRO Technical Assistant Mechanical Question Paper - 2019 (Set-2) with Answer Key