3-11.
Because of the size of the air
piston in an air-overhydraulic
brake system, the air pressure is
a much greater pressure than the
hydraulic pressure that is admitted
to the air cylinder.
1.
True
2.
False
3-12.
In a vacuum brake system, what
force acts on the rear side of the
piston to exert a powerful pull on
the rod attached to the piston?
1.
Compressed air
2.
Mechanical pressure
3.
Vacuum
4.
Atmospheric pressure
3-13.
What type of vacuum braking system
contains within one unit, a
hydraulically actuated control
valve, a vacuum power cylinder,
and a hydraulic slave cylinder?
1.
Hydrovac
2.
air-hydraulic unit
3.
electric vacuum unit
4.
air pack
Learning Objective:
Recognize
the principles and components
of electrical systems used in
automotive and construction
equipment.
3-14.
Which of the following components
is NOT a basic component of an
automotive and construction
equipment electrical system?
1.
A storage battery
2.
A charging system
3.
A starting circuit
4.
An electrostat
3-15.
Which of the following components
is the heart of the charging
circuit?
316.
Battery current is produced by
a chemical reaction between the
active materials of the plates
and what type of acid?
1.
Bromic
2.
Floric
3.
Sulfuric
4.
Phosphoric
3-17.
You can thoroughly clean a battery
by using a stiff brush and what
kind of solution?
1.
Water and baking soda
2.
Water and soap
3.
Water and detergent
4.
Water and vinegar
3-18.
The cell elements of a battery
contain two types of lead plates,
known as positive and negative.
1.
True
2.
False
319.
In what units is the capacity
of a battery measured?
1.
Cold current amps
2.
Circuit cranking voltage
3.
Cold cranking amps
4.
Continuous cranking voltage
320.
The charging system recharges the
battery and performs what other
function?
1.
Stores charged amps
2.
Generates current during
operation
3.
Stores charged voltage
4.
All of the above
3-21.
Dc and ac are the two types of
charging systems used on automotive
and construction equipment.
1.
True
2.
False
1.
The storage battery
2.
The starting circuit
3.
The lighting system
4.
The gauges
18