Question

A one-way check valve:

Answers

Drains the water and compressor oil from the air tanks.

Prevents air from escaping if the air compressor has a leak.

Activates the emergency brakes when there is a leak.

Holds the spring brakes in position until they are used.

Explanation

A one-way check valve is required to be between an air compressor and the first main reservoir. This valve prevents air from escaping the system if the air compressor develops a leak.

This questions appears in the following tests:

Colorado Double

Delaware Air Brakes

Florida Air Brakes

Georgia Class B Knowledge Test

Illinois Air Brakes

Indiana Class B Knowledge Test

Kansas Class B Knowledge Test

Kansas Passenger

Massachusetts Class A Knowledge Test

Minnesota Double

Mississippi Air Brakes

Montana Air Brakes

Nevada Air Brakes

New Jersey Tank

New Jersey Air Brakes

New York Class B Knowledge Test

New York Tank

New York Air Brakes

North Dakota Class A Knowledge Test

North Dakota Air Brakes

Tennessee Class B Knowledge Test

Wisconsin Class A Knowledge Test