Exam 13: Scientific Principles and Materials

Kinetic energy of a moving object increases at a rate that is ________.

A lever pivots at a point known as a ________.

Technician A says that the kinetic energy of a vehicle is proportional to its weight. Technician B says that the kinetic energy of a moving vehicle is directly proportional to its speed. Which technician is correct?

Heat always flows from a cooler object to a warmer object.

Two technicians are discussing engine horsepower and torque figures. Technician A says that torque is measured on a dynamometer. Technician B says that horsepower is measured on a dynamometer. Which technician is correct?

Two technicians are discussing temperature and heat. Technician A says that temperature is the intensity of the heat source. Technician B says that heat is the amount of heat. Which technician is correct?

The energy of mass in motion is called ________.

What term describes the ability to do work?

The brake pedal assembly uses a mechanical lever to ________.

Horsepower is torque times RPM divided by ________.

Which type energy is contained by a fully charged battery that is NOT connected to anything?

Technician A says that pure (distilled) water has a pH of 7. Technician B says that the pH of an acids is less than 7. Which technician is correct?

Heat can be transferred by how many different methods?

Which type lever increases force and changes direction?

All of the following are correct statements about braking EXCEPT ________.

What term describes the result when force is used to move an object?

A dynamometer actually measures ________ output of an engine.

When used on the brake pedal, leverage produces a mechanical advantage expressed as ________.

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

Generally, materials that are good conductors of heat are also good conductors of electricity.