Closed cycles in turbopump feed systems are also called as ______

open cycle

engine cycle

bottoming cycle

topping cycle

Correct Answer : topping cycle

Explanation : Closed and open cycles are both engine cycles. Closed cycle is also called topping cycle. In this cycle, the working fluid from the turbine is injected into the combustion chamber so that the energy of this working fluid is also utilized in the engine cycle.

Recently Updated in Rocket Propulsion Questions

Which of the following is not a property of the main liquid oxygen valve?

Low pressure

High pressure

Cryogenic

Reusable ball valve

Correct Answer : Option (A) : Low pressure

Explanation : Main liquid oxygen valves are under high pressure. Since liquid oxygen easily evaporates under normal atmospheric conditions, they are kept in cryogenic tanks. These valves also make use of reusable ball valves.

German antiaircraft missile Wasserfall used four of which of the following valves?

Latch valves

Burst diaphragm

Isolation valves

Drainage valves

Correct Answer : Option (B) : Burst diaphragm

Explanation : Burst diaphragm is used in the German missile Wasserfall. It actually used 4 of such burst disks.

Which of the following valves help in controlling gas pressures?

Latch valves

Isolation valves

Burst diaphragm

Pressure regulator

Correct Answer : Option (D) : Pressure regulator

Explanation : Pressure regulator, as the name mentions, helps in regulating or controlling gas pressure. Other valves serve different purposes, like maintaining the flow until a pressure differential (burst diaphragm) or for isolation of a particular flow region.