Fluid Mechanics & Thermal Sciences [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 32 - 35 of 77

Access detailed explanations (illustrated with images and videos) to 314 questions. Access all new questions- tracking exam pattern and syllabus. View the complete topic-wise distribution of questions. Unlimited Access, Unlimited Time, on Unlimited Devices!

View Sample Explanation or View Features.

Rs. 250.00 -OR-

How to register? Already Subscribed?

Question 32

Fluid Mechanics & Thermal Sciences
One Dimensional Heat Conduction

Appeared in Year: 2016

Question

MCQ▾

A plastic sleeve of outer radius covers a wire (radius ) carrying electric

current. Thermal conductivity of the plastic is . The heat transfer coefficient on the

outer surface of the sleeve exposed to air is . Due to the addition of the plastic cover, the

heat transfer from the wire to the ambient will

Choices

Choice (4)Response

a.

be zero

b.

increase

c.

decrease

d.

remain the same

Question 33

Fluid Mechanics & Thermal Sciences
Buoyancy

Appeared in Year: 2016

Question

MCQ▾

For a floating body, buoyant force acts at the

Choices

Choice (4)Response

a.

center of gravity of the body

b.

centroid of the floating body

c.

centroid of the fluid vertically below the body

d.

centroid of the displaced fluid

Question 34

Fluid Mechanics & Thermal Sciences
Zeroth

Appeared in Year: 2016

Question

MCQ▾

Which of the following statements are TRUE with respect to heat and work?

(i) They are boundary phenomena

(ii) They are exact differentials

(iii) They are path functions

Choose the Correct Option:

Choices

Choice (4)Response

a.

(ii) and (iii)

b.

(i) and (iii)

c.

(i) and (ii)

d.

only (iii)

Question 35

Fluid Mechanics & Thermal Sciences
Power Engineering

Appeared in Year: 2019

Question

Numeric Answer▾

A steam power cycle with regeneration as shown below on the T-s diagram employs a single open feedwater heater for efficiency improvement. The fluids mix with each other in an open feedwater heater. The turbine is isentropic and the input (bleed) to the feedwater heater from the turbine is at state 2 as shown in the figure. Process 3 - 4 occurs in the condenser. The pump work is negligible. The input to the boiler is at state 5. The following information is available from the steam tables:

A Steam Power Cycle with Regeneration
State123456
Enthalpy (kJ/kg)3350280023001757001000
A Steam Power Cycle with Regeneration

The mass flow rate of steam bled from the turbine as a percentage of the total mass flow rate at the inlet to the turbine at state 1 is ________.

Developed by: