Explore topic-wise MCQs in Heat Transfer.

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

1.

Exhaust gases (c P = 1.12 k J/kg K) flowing through a tubular heat exchanger at the rate of 1200 kg/hr are cooled from 400 degree Celsius to 120 degree Celsius. This cooling is affected by water (c P = 4.18 k J/kg K) that enters the system at 10 degree Celsius at the rate of 1500 kg/hr. If the overall heat transfer coefficient is 500 k J/m2 hr degree, what heat exchanger area is required to handle the load for counter flow arrangement?

A. 2.758 m<sup>2</sup>
B. 3.758 m<sup>2</sup>
C. 4.758 m<sup>2</sup>
D. 5.758 m<sup>2</sup>
Answer» C. 4.758 m<sup>2</sup>
Discussion
2.

In a food processing plant, a brine solution is heated from 12 degree Celsius to 65 degree Celsius in a double pipe parallel flow heat exchanger by water entering at 35 degree Celsius and leaving at 20.5 degree Celsius. Let the rate of flow is 9 kg/min. Estimate the area of heat exchanger for an overall heat transfer coefficient of 860 W/m2 K. For water c P = 4.186 * 10 3 J/kg K

A. 1. 293 m<sup>2</sup>
B. 0.293 m<sup>2</sup>
C. 7. 293 m<sup>2</sup>
D. 8. 293 m<sup>2</sup>
Answer» C. 7. 293 m<sup>2</sup>
Discussion