For hydrogen to use as coolant its purity must be more than _______
A. 74%
B. 50%
C. 100%
D. None of the mentioned
Answer:A
For hydrogen to use as coolant its purity must be more than _______
A. 74% B. 50% C. 100% D. None of the mentioned
Explanation: For hydrogen to use as coolant its purity must be more than 74%. Below 74% hydrogen is more combustible in nature.