Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 22 - 26 of 77

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Question 22

Fluid Mechanics & Thermal Sciences
Differential Equations of Continuity and Momentum

Appeared in Year: 2015

Question

Numeric Answer▾

The velocity field of an incompressible flow is given by

, where and , where and . The value of is

Question 23

Fluid Mechanics & Thermal Sciences
Thermal Boundary Layer

Appeared in Year: 2015

Question

MCQ▾

For flow of viscous fluid over a flat plate, if the fluid temperature is the same as the plate temperature, the thermal boundary layer is

Choices

Choice (4)Response

a.

not formed at all

b.

of the same thickness as the velocity boundary layer

c.

Thicker than the velocity boundary layer

d.

Thinner than the velocity boundary layer

Question 24

Fluid Mechanics & Thermal Sciences
Fluid Acceleration

Question

MCQ▾

Consider two dimensional velocity field given by . Where and are constants. Which one of the following conditions needs to be satisfied for the flow is incompressible?

Choices

Choice (4)Response

a.

b.

c.

d.

Question 25

Fluid Mechanics & Thermal Sciences
Vapour Refrigeration Cycle

Appeared in Year: 2015

Question

Numeric Answer▾

A stream of moist air with humidity ratio of mixes with a second stream of superheated water vapour flowing at . Assuming proper and uniform mixing with no condensation, the humidity ratio of the final stream is

Question 26

Fluid Mechanics & Thermal Sciences
First and Second Laws of Thermodynamics

Appeared in Year: 2015

Question

MCQ▾

For an ideal gas with constant values of specific heats, for calculation of the specific enthalpy,

Choices

Choice (4)Response

a.

both temperature and pressure are required to be known

b.

both temperature and volume are required to be known

c.

it is sufficient to know only the temperature

d.

both temperature and mass are required to be known

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