GATE PI topic:thermal-fluids-engineering PYQs & Answers

Questions 1–10 of 39. Imported answers require independent review unless marked reviewed.

Which ONE or MORE among the following process of the Carnot cycle is/are isentropic?

Diagram for Production and Industrial Engineering question 29

Your answerSelect all correct options. You can choose more than one.

1-2

2-3

3-4

4-1

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A glass tube of 2.5 mm diameter is immersed vertically in a fluid.

Assume contact angle is zero. The surface tension of the fluid is 0.1 N/m, density of the fluid is 1000 kg/m³ and acceleration due to gravity is 10 m/s².

The approximate capillary rise is _____ mm.

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

For an ideal Diesel cycle, the heat addition is an

Your answerChoose one option.

isobaric process

isothermal process

isochoric process

isentropic process

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Water flows through a smooth circular pipe of diameter 10 cm and length 10 m. The pressure drop across the length of the pipe is 0.2 Pa. Kinematic viscosity and density of water are 1×10⁻⁶ m²/s and 1000 kg/m³, respectively. Assuming laminar and fully developed flow throughout the pipe, the velocity of water (in m/s) at the center of the pipe is __________. (Rounded off to one decimal place)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The left-hand side of a 20 cm thick wall is maintained at 25 °C. The right-hand side of the wall is exposed to hot air at 50 °C. There is no heat generation inside the wall and its thermal conductivity is 100 W/m·K. The convective heat transfer coefficient is 50 W/m²·K. Under steady state condition, the temperature (in °C) of the right-hand side surface of the wall is__________. (Rounded off to one decimal place)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A thin copper wire carries electric current and is insulated by putting a sleeve of thickness

, over it. In steady state conditions, the rate of heat loss from the insulated wire per unit length is

. Which of the following is TRUE?

Your answerChoose one option.

increases monotonically with

decreases monotonically with

first increases with increase in

, and then it decreases with further increase in

first decreases with increase in

, and then it increases with further increase in

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

An irrigation pump is used to draw water from a pond. One end of a 5.05 cm diameter hose pipe is connected to the outlet of the pump at 1.02 m below the surface level, and just after the pump, the static gauge pressure and flow rate of the water are 50 kPa and 8 kg/s, respectively. The pumped water is discharged at the ground level through a nozzle. Assume that the flow through the hose pipe and nozzle is steady and laminar, and friction and viscous losses are negligible. The density of water is 1000 kg/m

and the acceleration due to gravity is 9.81 m/s

. If the static pressure at the nozzle exit of the nozzle jet reduces to atmospheric pressure then the nozzle diameter (in cm) of the nozzle is __________. (Rounded off to 2 decimal places)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In an air-standard Otto cycle, the pressure and temperature of air just before the compression stroke are 200 kPa and 26.85 °C, respectively. The combustion process is assumed to be a constant volume process, where 1.02 MJ/kg heat is added. The cycle efficiency is 50%. The adiabatic index

and specific heat at constant volume

can be considered to be constant during the process (corresponding values taken at the mean cycle temperature).

Assuming that the ideal gas law is applicable,

and

kJ/kg-K, the maximum pressure (in MPa) reached during the cycle is __________. (Rounded off to 1 decimal place)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Two plane parallel surfaces exchange heat by thermal radiation. A radiation shield is placed in between at equal distance from the two surfaces to reduce heat transfer. All surfaces are black with infinite length and width. The ratio of heat transfer rate between surfaces with and without radiation shield is

Your answerChoose one option.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

A wooden cubical block of side 0.1 m has specific gravity (SG) of 0.75. It is held submerged in a pool of oil and water by a massless rigid wire as shown in figure. The density of water is 1000 kg/m

and acceleration due to gravity is 9.8 m/s

. The tension, in N, in the wire is _____ (round off to 2 decimal places).

Diagram for Production and Industrial Engineering question 31

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE PI topic:thermal-fluids-engineering PYQs

How to practice topic:thermal-fluids-engineering

Question 29

Question 43

Question 28

Question 64

Question 65

Question 14

Question 48

Question 49

Question 15

Question 31