Exam 3: Basic Theories and Math

How is an electromagnet constructed?

You have a sealed hydraulic system with two cylinders connected to each other by a tube filled with hydraulic fluid. Piston #1 has an area of 1 sq. in. Piston #2 has an area of 4 sq. in. How much force is developed on piston #2 if 50 lbs. of force is applied to piston #1?

Blaise  Pascal constructed the first known hydraulic device.

Name five simple machines.

The most common unit of vacuum is _____.

All the following are types of heat transfer EXCEPT:

What is the thermal efficiency of a vehicle that produces 34,000 BTU of work for each 100,000 BTU of fuel it uses?

Forces are being discussed. Technician A says centrifugal force tends to pull things toward the center of a circle. Technician B says centripetal force tends to push things away from the center of a circle. Who is correct?

Technician A says both liquids and gases are fluids. Technician B says liquids can be compressed. Who is correct?

What is horsepower?

____________________ is the study of the effects of air on a moving object.

A brake drum is stamped Maximum Diameter 203.5mm. What is the maximum diameter in inches (to three decimal places)that the drum can be used?

A force acting over a large area will exert less pressure per square inch than the same force acting over a smaller area.

The formula CID = π x R² x L x N is used to calculate _____.

All materials have a unique resonant or natural vibration frequency.

Engine efficiency is expressed as a ____________________.

Which of the following laws pertains to the behavior of gases?

The unit of frequency is ____________________.

What is an alloy?

The strength of an electrostatic force is called ______.