Aviation and Aerospace Engineering

Question 1

1A rocket expels gas at 2,500 m/s at a rate of 100 kg/s. What thrust does it produce?

Medium

A. 2,600 N B. 2,500,000 N C. 250,000 N D. 25,000 N

Question 2

2Propellers produce thrust by

Easy

A. pushing the ground B. using magnets C. accelerating air backward D. heating air

Question 3

3A jet engine takes in air at 200 m/s and expels it at 600 m/s, with a mass flow of 50 kg/s. What thrust does it produce?

Medium

A. 40,000 N B. 10,000 N C. 30,000 N D. 20,000 N

Question 4

4The part of a jet engine where fuel is burned is the

Easy

A. nozzle B. intake C. combustion chamber D. compressor

Question 5

5The bypass ratio of a turbofan compares

Hard

A. air bypassing the core to air through the core B. thrust to weight C. fuel to air D. speed to height

Question 6

6A jet engine accelerates 50 kg/s of air from 200 m/s to 600 m/s. The thrust is

Hard

A. 10,000 N B. 20,000 N C. 30,000 N D. 40,000 N

Question 7

7A turbofan engine is common on

Easy

A. hot-air balloons B. bicycles C. gliders D. modern airliners

Question 8

8The afterburner in a jet engine

Medium

A. cools the engine B. injects extra fuel to increase thrust C. reduces noise D. stops the engine

Question 9

9A rocket engine can work in space because it

Easy

A. uses air from the atmosphere B. carries its own oxidiser C. has propellers D. uses wind

Question 10

10A propeller produces thrust by

Easy

A. creating a vacuum ahead B. burning fuel in its blades C. accelerating a large mass of air backwards D. pushing against the ground