MCQOPTIONS
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MCQOPTIONS
This section includes 5 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. |
A non-conducting liquid is passed inside a metal tube carrying electricity (Voltage=220V, current=0.5A), what is the final temperature of the bulk of liquid if it enters at 10℃. (h =100 W/m2K, Area =0.2m2) |
| A. | 25.5℃ |
| B. | 15.0℃ |
| C. | 15.5℃ |
| D. | 14.5℃ |
| Answer» D. 14.5℃ | |
| 2. |
Given the convective heat transfer Coefficient of the inner surface to be 15W/m2K, OD = 30mm and ID = 25mm. Find the outer surface heat transfer coefficient. |
| A. | 15 W/m2K |
| B. | 12 W/m2K |
| C. | 12.5 W/m2K |
| D. | 13.5 W/m2K |
| Answer» D. 13.5 W/m2K | |
| 3. |
The temperature profile of a fully developed Thermal flow in a pipe of length L can be defined by the formula. Tbulk – Twall = (Tinlet – Twall)eλL |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Given a fluid enters at a temperature of 22℃into a pipe of length 1m. On fully developed thermal flow, the wall temperature is 92℃, determine the temperature of the bulk of the liquid at exit. (Given λ = 0.5) |
| A. | 50℃ |
| B. | 100℃ |
| C. | 104℃ |
| D. | 150℃ |
| Answer» B. 100℃ | |
| 5. |
A liquid is heated by passing it through a circular pipe (kpipe = 15W/mK, viscosity = 2.5×10-5 Pa-s, Cp = 1000 J/Kg-K, kliquid = 0.035 W/mK) of ID = 25mm and OD = 30mm with length L = 15 m. If the Reynolds No. is 79000. What is the outer surface average heat transfer coefficient? |
| A. | 773KW/m2K |
| B. | 83KW/m2K |
| C. | 104KW/m2K |
| D. | 43KW/m2K |
| Answer» C. 104KW/m2K | |