Reading Flashcards
7 cards from real Air Brake Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Reading flashcards as text
On a dual air brake system gauge, what does it mean when the air pressure for one of the two separate systems drops?
Answer: Only that one system is affected and the other still works
A dual air brake system has two separate systems, so a loss in one still leaves the other operational.
When the low air pressure warning light comes on, at roughly what pressure does it typically activate?
Answer: Below 60 psi
The low air pressure warning must activate before pressure drops below 60 psi.
What does the air compressor governor control?
Answer: When the compressor pumps air into the tanks
The governor controls at what pressure the compressor stops and starts pumping air into the reservoirs.
Reading the manufacturer's plate, what is the purpose of the supply pressure gauge?
Answer: Shows how much pressure is in the air tanks
The supply pressure gauge tells the driver how much air pressure is in the tanks.
What does an application pressure gauge show the driver?
Answer: How much air pressure is being applied to the brakes
The application pressure gauge shows how much air pressure is being applied to the brakes.
When reading brake instructions, increasing application pressure to hold speed on a downgrade is a sign of what?
Answer: Brakes are fading and losing effectiveness
Needing more pressure to maintain speed indicates the brakes are fading.
What does the safety relief valve in the air brake system protect against?
Answer: Too much pressure
The safety relief valve protects the tank and system from too much pressure.