Question

Special considerations must be given to systems using liquid hydrogen for fuel because of: A. Liquid hydrogen's low density B. Liquid hydrogen's low storage temperature C. The high flammability of hydrogen vapors D. All of the above

Answer 1

Answer:

D.All of the above

Explanation:

Properties of hydrogen:

1.It is lighter than air.It has density about 0.089 g/L.

2.Hydrogen  rapidly change from liquid state to gas,so special protection is required to protect it.

3.It is highly flammable gas.

4.Liquid form of hydrogen exits at -432 F .This is very low temperature so special protection requires to keep it in liquid form.