question_answer

                         Consider the following statements relating to rocket engines:                                  

1. The combustion chamber in a rocket engine is directly analogous to the reservoir of a supersonic wind tunnel.

2. Stagnation conditions exist at the combustion chamber.

3. The exit velocities of exhaust gases are much higher than those in jet engines.

4. Efficiency of rocket engines is higher than that of jet engines.

Of these statements:                      

A) 1, 3 and 4 are correct                

B) 1, 3 and 4 are correct           

C) 1, 2 and 3 are correct                 

D) 1 and 4 are correct