GATE ME branch:me PYQs & Answers — Page 58

Questions 571–580 of 1040. Imported answers require independent review unless marked reviewed.

The velocity field of an incompressible flow in a Cartesian system is represented by

Which one of the following expressions for

is valid?

Your answerChoose one option.

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A closed vessel contains pure water, in thermal equilibrium with its vapour at 25°C (Stage #1), as shown.

Diagram for Mechanical Engineering question 16

The vessel in this stage is then kept inside an isothermal oven which is having an atmosphere of hot air maintained at 80°C. The vessel exchanges heat with the oven atmosphere and attains a new thermal equilibrium (Stage #2). If the Valve A is now opened inside the oven, what will happen immediately after opening the valve?

Your answerChoose one option.

Water vapor inside the vessel will come out of the Valve A

Hot air will go inside the vessel through Valve A

Nothing will happen – the vessel will continue to remain in equilibrium

All the vapor inside the vessel will immediately condense

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For an ideal gas, the value of the Joule-Thomson coefficient is

Your answerChoose one option.

positive

negative

zero

indeterminate

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For an air-standard Diesel cycle,

Your answerChoose one option.

heat addition is at constant volume and heat rejection is at constant pressure

heat addition is at constant pressure and heat rejection is at constant pressure

heat addition is at constant pressure and heat rejection is at constant volume

heat addition is at constant volume and heat rejection is at constant volume

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For an ideal gas, a constant pressure line and a constant volume line intersect at a point, in the Temperature (

) versus specific entropy (

) diagram.

is the specific heat at constant pressure and

is the specific heat at constant volume. The ratio of the slopes of the constant pressure and constant volume lines at the point of intersection is

Your answerChoose one option.

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The values of enthalpies at the stator inlet and rotor outlet of a hydraulic turbomachine stage are

and

respectively. The enthalpy at the stator outlet (or, rotor inlet) is

. The condition

indicates that the degree of reaction of this stage is

Your answerChoose one option.

zero

50%

75%

100%

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For three vectors

and

, where,

and

are unit vectors along the axes of a right-handed rectangular/Cartesian coordinate system, the value of

is ____________.

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Let

be a 100 dimensional identity matrix and

be the set of its distinct (no value appears more than once in

) real eigenvalues. The number of elements in

is ________.

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A flywheel is attached to an engine to keep its rotational speed between 100 rad/s and 110 rad/s. If the energy fluctuation in the flywheel between these two speeds is 1.05 kJ then the moment of inertia of the flywheel is ____________ kg.m² (round off to 2 decimal places).

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A beam of negligible mass is hinged at support P and has a roller support Q as shown in the figure. A point load of 1200 N is applied at point R. The magnitude of the reaction force at support Q is ______ N.

Diagram for Mechanical Engineering question 20

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GATE ME branch:me PYQs

Question 16

Question 16

Question 17

Question 17

Question 18

Question 18

Question 19

Question 19

Question 20

Question 20