How do brakes work on a long, steep downgrade?
a) They work as the main braking mechanism
b) They work as the main braking mechanism, with the engine braking effect as an emergency backup
c) Not applicable; no braking effect is involved in a downgrade
d) They work as a supplement to the braking effect of your engine
Answer: d) They work as a supplement to the braking effect of your engine
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.