Which of the following is not used as a fuel in rocket propellaht ?
A. Liquid hydrogen
B. Liquid oxygen
C. Liquid hydrazine
D. Kerosene oil
Answer: Option B
A. Liquid hydrogen
B. Liquid oxygen
C. Liquid hydrazine
D. Kerosene oil
Answer: Option B
Which of the following will resist maxi-mum shock & vibration without cracking?
A. Grey cast iron
B. White cast iron
C. Malleable iron
D. Graphite
A. Pulverised fuel
B. Travelling grate stoker firing
C. Circulating fluidised bed
D. Fluidised bed
Isotropic materials have the same __________ in all directions.
A. Induced stresses
B. Density
C. Elastic properties
D. Thermal properties
I think it's wrong