Question

operation
a professional floor jack can often be operated in two ways. the foot pedal is used to quickly raise the support cup to the lifting point. because the pedal is short, it is not suitable to transfer a large force. as soon as the support cup is exerting force on the vehicle, you should switch to using the operating handle. the handle is long, so a large force can be exerted.
both operating mechanisms operate the hydraulic cylinder. by applying pressure to the hydraulic ram, it moves outwards. this ram is connected to the lifting arm. as a result, the lifting arm follows the hydraulic ram movement.
how can a floor jack be operated?
foot pedal
crank
operating handle

Explanation:

The text states that a professional floor - jack can be operated in two ways: using the foot pedal to quickly raise the support cup to the lifting point and then switching to the operating handle when the support cup exerts force on the vehicle. There is no mention of a crank.

Answer:

A. Foot pedal
C. Operating handle