Question

When you apply your brakes with the treadle valve, two forces push back against your foot to let you feel how much air pressure is being applied to the brakes. One is air pressure going to the brakes and:

1) Weight of your foot balanced on the apex of the pedal
2) Drag of the brake lining against the drums
3) The torque generated as the axles flexes
4) A spring located in the valve itself

Answer 1

The force that pushes back against your foot to determine the amount of air pressure applied to the brakes is a spring located in the valve itself.OPTION 4.

Step-by-step explanation:

The correct answer to the question is 4) A spring located in the valve itself.

When you apply your brakes with the treadle valve, two forces push back against your foot to let you feel how much air pressure is being applied to the brakes. One force is the air pressure going to the brakes, and the other force is a spring located in the valve itself. The spring provides resistance and pushes back against your foot. By feeling the strength of the spring, you can determine the amount of air pressure being applied to the brakes.

Therefore, the weight of your foot balanced on the apex of the pedal, the drag of the brake lining against the drums, and the torque generated as the axle flexes are not forces that push back against your foot to determine the amount of air pressure applied to the brakes.