Correct answer
C. Absence of air
Explanation
The correct answer is Absence of air.
Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C?
In an ideal refrigeration cycle, the change in internal energy of the fluid is________?
Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is ________?
In Bode plot, A.R. vs. w is plotted on a/an ________ graph paper?
A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be ________ litres?
Which one expands on heating?