A. I.C. engine
B. air preheaters
C. heating of building in winter
D. all of the above
E. none of the above
Correct Answer: none of the above ✔
Last Updated: January 24, 2019
A. I.C. engine
B. air preheaters
C. heating of building in winter
D. all of the above
E. none of the above
Correct Answer: none of the above ✔
Last Updated: January 24, 2019