Question

1. the type of working fluid, method of compression and means by which the mechanical energy is transmitted into a propulsive force are categories that describe ....

b. heat engines

c. reliability

d. durability

a. thrust

Explanation:

Heat engines are defined by their working fluid, compression method, and how they convert mechanical energy into propulsive force. Thrust is the resulting force, while reliability and durability refer to performance over time, not these core categorizing features.

Answer:

b. heat engines