Chapter 13

The brake pedal assembly uses a mechanical lever to

increase the driver's force on the brake pedal applied to the master cylinder

All of the following are correct statements about braking except:

kinetic energy of the vehicle doubles when the speed doubles

Two techs are discussing engine horsepower and torque figures. Tech A says that torque is measured on a dynamometer. Tech B says that horsepower is measure on a dynamometer. Who's correct?

Tech A (Torque is measure and horsepower is calculated)

Tech A says that work is being performed if a force is being applied, yet the object does not move. Tech B says that torque is a twisting force that may or may not result in motion. Who's correct?

Tech B

Tech A says that pure (distilled) water has a pH of 7. Tech B says that the pH of acids is less than 7. Who is correct?

Both

Tech A says that the kinetic energy of a vehicle is proportional to it's weight. Tech B says that the kinetic energy of a moving vehicle is directly proportional to its speed. Who's correct?

Both

Tech A says that zero degrees Celsius is the freezing temperature of water. Tech B says that 100 degrees Celsius is the boiling temperature of water. Which tech is correct?

Both

Two techs are discussing temperature and heat. Tech A says that temperature is the intensity of the heat source. Tech B says that heat is the amount of heat. Who's correct?

Both

An example of a lever and mechanical advantage used on a vehicle is the

brake pedal

Heat can move or travel by

conduction, convection, and radiation