Question

For performance calculations, airliner manufacturers use a density of jet fuel around _________

(a) 2 kg/l

(b) 0.2 kg/l

(c) 8 kg/l

(d) 0.8 kg/l

This question was addressed to me during an internship interview.

This interesting question is from Aircraft Systems and Aviation topic in portion Aircraft Systems and Aviation Overview of Aircraft Maintenance

Answer 1

Right choice is (d) 0.8 kg/l

Easiest explanation: For performance calculations, airliner manufacturers use a density of jet fuel around 0.8 kg/l. There are some exceptions, for example, Embraer in its manual for the E195 aircraft uses an adopted fuel density of 0.811 kg/l.