CDL Air Brake Air Tanks and Drains 2

Question 1

What can happen if water is not drained from air tanks during cold weather?

Accepted Answer

The water can freeze and cause brake failure

Answer

The compressor will overheat

Answer

Air pressure will build up too quickly

Answer

The governor will shut off the compressor

Question 2

Which air tank typically accumulates the most water and oil contamination?

Accepted Answer

Supply (wet) tank

Answer

Primary service tank

Answer

Secondary service tank

Answer

Trailer reservoir tank

Question 3

What type of drain valve removes moisture from air tanks automatically?

Accepted Answer

Automatic drain valve

Answer

Manual petcock valve

Answer

Spring-loaded pressure valve

Answer

Safety relief valve

Question 4

What is the minimum number of air tanks required in a basic single air brake system?

Accepted Answer

One tank

Answer

Two tanks

Answer

Three tanks

Answer

Four tanks

Question 5

Where are drain valves typically located on air tanks?

Accepted Answer

At the bottom of the tank

Answer

At the top of the tank

Answer

On the side of the tank near the inlet

Answer

Near the pressure gauge fitting

Question 6

During a pre-trip inspection, what should you do with manual drain valves on air tanks?

Accepted Answer

Open them to drain moisture, then close them before driving

Answer

Leave them open while driving to prevent pressure buildup

Answer

Check that they are sealed and never touch them

Answer

Replace them if any moisture comes out

Question 7

What substance besides water commonly collects in air tanks and must be drained?

Accepted Answer

Oil from the air compressor

Answer

Brake fluid

Answer

Coolant

Answer

Transmission fluid