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

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

1.

A single cylinder 2-stroke engine operates at 1500 rpm. Calculate the depth where the temperature wave due to variation in cylinder is damped to 1% of its surface value. For the cylinder material, thermal diffusivity = 0.042 m2/hr

A. 0.1996 cm
B. 0.3887 cm
C. 0.2774 cm
D. 0.1775 cm
Answer» E.
Discussion
2.

The temperature variation of a thick brick wall during periodic heating or cooling follows a sinusoidal waveform. During a period of 24 hours, the surface temperature ranges from 25 degree Celsius to 75 degree Celsius. Workout the time lag of the temperature wave corresponding to a point located at 25 cm from the wall surface. Thermo-physical properties of the wall material are; thermal conductivity = 0.62 W/m K; specific heat = 450 J/kg K and density = 1620 kg/m3

A. 3.980 hour
B. 6.245 hour
C. 2.648 hour
D. 3.850 hour
Answer» C. 2.648 hour
Discussion