Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 27 - 31 of 77

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Question 27

Fluid Mechanics & Thermal Sciences
Bernoulli's Equation

Question

MCQ▾

Within a boundary layer for a steady incompressible flows the Bernoulli equation

Choices

Choice (4)Response

a.

Holds because the flow is incompressible

b.

Holds because the flow is steady

c.

Holds because the flow is transitional

d.

Does not hold because the flow is viscous

Question 28

Fluid Mechanics & Thermal Sciences
Bernoulli's Equation

Appeared in Year: 2015

Question

Numeric Answer▾

Water flows through a venturi meter with inlet diameter and throat diameter . The inlet and throat gauge pressures are measured to be and , respectively. Assuming the venturi meter to be horizontal and neglecting friction, the inlet velocity

(in ) is

Question 29

Fluid Mechanics & Thermal Sciences
Viscous Flow

Appeared in Year: 2015

Question

Numeric Answer▾

Air and kinematic viscosity, with a velocity of flows over the top surface of a flat plate of length . If the average value of friction coefficient is

, the total drag force (in N) per unit width of the plate is________

Question 30

Fluid Mechanics & Thermal Sciences
Viscous Flow

Appeared in Year: 2016

Question

MCQ▾

The instantaneous stream-wise velocity of a turbulent flow is given as follows:

. The time-average of the fluctuating velocity is

Choices

Choice (4)Response

a.

b.

c.

d.

zero

Question 31

Fluid Mechanics & Thermal Sciences
Power Engineering

Appeared in Year: 2016

Question

MCQ▾

The INCORRECT statement about regeneration in vapor power cycle is that

Choices

Choice (4)Response

a.

it is practically implemented by providing feed water heaters

b.

Heat is exchanged between the expanding fluid in the turbine and the compressed fluid before heat addition

c.

it increases the irreversibility by adding the liquid with higher energy content to the steam generator

d.

the principle is like the principle of Stirling gas cycle

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