For the calculation of Dirty Overall Heat transfer coefficient UD, for given fouling factor Rf and Dirt Factor Rd, which one of the following expressions do we use?

\(\frac{1}{U_D} = \frac{1}{U_C} + R_D\)

\(\frac{1}{U_D} = \frac{1}{U_C} + \frac{1}{R_D}\)

Explore topic-wise MCQs in Heat Transfer Operations Questions and Answers.

This section includes 2 Mcqs, each offering curated multiple-choice questions to sharpen your Heat Transfer Operations Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.	Deposition fouling can be avoided or controlled by monitoring the flow velocity of the fluid so that sediments don’t settle out.
A.	True
B.	False
Answer» B. False

Discussion

2.	For the calculation of Dirty Overall Heat transfer coefficient UD, for given fouling factor Rf and Dirt Factor Rd, which one of the following expressions do we use?
A.	\(\frac{1}{U_D} = \frac{1}{U_C} + R_D\)
B.	\(\frac{1}{U_D} = \frac{1}{U_C} + \frac{1}{R_D}\)
C.	UD = UC + RD
D.	UD = \(U_C+\frac{1}{R_D}\)
Answer» C. UD = UC + RD

Discussion

Explore topic-wise MCQs in Heat Transfer Operations Questions and Answers.

Deposition fouling can be avoided or controlled by monitoring the flow velocity of the fluid so that sediments don’t settle out.

For the calculation of Dirty Overall Heat transfer coefficient UD, for given fouling factor Rf and Dirt Factor Rd, which one of the following expressions do we use?