GATE CH format:mcq PYQs & Answers — Page 21

Questions 201–210 of 378. Imported answers require independent review unless marked reviewed.

Topic practice 378 questionsPage 21 of 38

A three-dimensional velocity field is given by

, where

are the unit vectors in

directions, respectively, describing a cartesian coordinate system. The coefficient

is a constant. If

describes an incompressible fluid flow, the value of

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

Heat transfer coefficient for a vapor condensing as a film on a vertical surface is given by

Your answerChoose one option.

Dittus-Boelter equation

Nusselt theory

Chilton-Colburn analogy

Sieder-Tate equation

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

In a double-pipe heat exchanger of 10 m length, a hot fluid flows in the annulus and a cold fluid flows in the inner pipe. The temperature profiles of the hot (

) and cold (

) fluids along the length of the heat exchanger (

, such that

), are given by

where

and

are in °C, and

is in meter. The logarithmic mean temperature difference (in °C) is

Your answerChoose one option.

24.6

27.9

30.0

50.0

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

For a shell-and-tube heat exchanger, the clean overall heat transfer coefficient is calculated as 250 W m

for a specific process condition. It is expected that the heat exchanger may be fouled during the operation, and a fouling resistance of 0.01 m

K W

is prescribed. The dirt overall heat transfer coefficient is _____ W m

Your answerChoose one option.

100

150

200

250

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

In reverse osmosis, the hydraulic pressure and osmotic pressure at the feed side of the membrane are P₁ and π₁, respectively. The corresponding values are P₂ and π₂ at the permeate side. The membrane, feed, and permeate are at the same temperature. For equilibrium to prevail, the general criterion that should be satisfied 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

Ethylene adsorbs on the vacant active sites V of a transition metal catalyst according to the following mechanism.

Diagram for Chemical Engineering question 10

and

denote the total number of active sites, number of vacant active sites and number of adsorbed C₂H₄ molecules, respectively, the balance on the total number of active sites is given by

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

Which of the following is NOT a standard to transmit measurement and control signals?

Your answerChoose one option.

4–20 mA

3–15 psig

0–100 %

1–5 VDC

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

A feedforward controller can be used only if

Your answerChoose one option.

the disturbance variable can be measured

the disturbance variable can be manipulated

the disturbance variable can be ignored

regulatory control is not required

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

Turnover ratio is defined as

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 principal amount is charged a nominal annual interest rate of 10%. If the interest rate is compounded continuously, the final amount at the end of one year would be

Your answerChoose one option.

higher than the amount obtained when the interest rate is compounded monthly

lower than the amount obtained when the interest rate is compounded annually

equal to 1.365 times the principal amount

equal to the amount obtained when using an effective interest rate of 27.18%

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

GATE CH format:mcq PYQs

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14