Question

To reduce piston exhaust noise ______________

(a) we can use more mufflers

(b) mufflers can be used only

(c) reduce lift always

(d) increase jet speed always

The question was asked in an interview for internship.

Question is from Configuration Layout Considerations topic in division Configuration Layout Considerations of Aircraft Design

Answer 1

Right choice is (a) we can use more mufflers

To elaborate: Noise by a piston engine exhaust can be reduced in a number of ways. One of them is by adopting mufflers. Apart from muffler, we can redirect the exhaust in such way that the resulting noise will be much lesser.