DZ License Exam Prep: Questions and
Answers for Ontario Highway Traffic Act
Brakes convert the energy of a moving vehicle into - ANSWERheat
Hydraulic Brakes are used on passenger vehicles and use_______ to operate
the brakes - ANSWERbrake fluid
Air brakes are used on most large commercial vehicles and use _____ to
operate the brakes - ANSWERcompressed air
A split-second delay in brake reaction is present in ... - ANSWERall air brake
systems
Vehicles with air brakes may use either - ANSWERdrum or disc brakes
Compressed air is a form of stored energy that can be - ANSWERhazardous
Air compressors are powered directly by - ANSWERthe engine or by using
belts and pulleys
Air compressors are mounted directly on - ANSWERthe engine or by using
brackets and fasteners
, The governor controls - ANSWERthe air compressor cut-in and cut-out
pressure
The operating pressure range for vehicle air brake systems must be between -
ANSWER(80 psi - 135 psi)
It is unsafe to drive a vehicle when the air pressure is - ANSWERoutside the
normal operating range.
Compressed air is stored in - ANSWERthe vehicle's supply or 'wet' tank and
the primary and secondary air tanks
To prevent too much moisture and oil from collecting, - ANSWERthe air tanks
must be drained regularly
Air pressure gauges indicate air pressure in - ANSWERthe vehicle's primary
and secondary air tanks
Safety valves prevent - ANSWERoverpressure of the air brake system
Low air pressure warning devices give drivers - ANSWERa visual & sometimes
audible warning that air pressure is dangerously low
An air dryer removes moisture from - ANSWERthe air brake system & expels
it when compressor reaches cut-out pressure
Answers for Ontario Highway Traffic Act
Brakes convert the energy of a moving vehicle into - ANSWERheat
Hydraulic Brakes are used on passenger vehicles and use_______ to operate
the brakes - ANSWERbrake fluid
Air brakes are used on most large commercial vehicles and use _____ to
operate the brakes - ANSWERcompressed air
A split-second delay in brake reaction is present in ... - ANSWERall air brake
systems
Vehicles with air brakes may use either - ANSWERdrum or disc brakes
Compressed air is a form of stored energy that can be - ANSWERhazardous
Air compressors are powered directly by - ANSWERthe engine or by using
belts and pulleys
Air compressors are mounted directly on - ANSWERthe engine or by using
brackets and fasteners
, The governor controls - ANSWERthe air compressor cut-in and cut-out
pressure
The operating pressure range for vehicle air brake systems must be between -
ANSWER(80 psi - 135 psi)
It is unsafe to drive a vehicle when the air pressure is - ANSWERoutside the
normal operating range.
Compressed air is stored in - ANSWERthe vehicle's supply or 'wet' tank and
the primary and secondary air tanks
To prevent too much moisture and oil from collecting, - ANSWERthe air tanks
must be drained regularly
Air pressure gauges indicate air pressure in - ANSWERthe vehicle's primary
and secondary air tanks
Safety valves prevent - ANSWERoverpressure of the air brake system
Low air pressure warning devices give drivers - ANSWERa visual & sometimes
audible warning that air pressure is dangerously low
An air dryer removes moisture from - ANSWERthe air brake system & expels
it when compressor reaches cut-out pressure
