Batteries
What is the recommended maximum charging rate for a heavy-duty, 12-volt battery? 12 amps 120 amps 30 amps 60 amps
60 amps
A battery must be at least ______ charged to perform a capacity test. 75% 15% 52% 100%
75%
Which of the following appearances would indicate batteries have either been overheated or frozen? Dirty case Leaks Cracks Bulges
Bulges
Which of the following would slow a chemical reaction? Excessive amperage Cold Excessive torque Heat
Cold
What is a battery case usually made of? Hard rubber Fiberglass Lead Polypropylene
Polypropylene
All modern vehicles have a small amount of _________ when the ignition is turned off. constant amperage current draw electrical energy input voltage
current draw
Voltage reading can identify ___________. battery hold-downs voltage leaks defective cells reasons for battery failure
defective cells
If two 12-volt batteries are connected in parallel, the resulting voltage would be: 24 volts 12 volts 18 volts 6 volts
12 volts
A fully charged battery should have an open-circuit voltage of how many volts? 2.1 12.6 7.2 9.6
12.6
The electrodes and electrolyte of a lead-acid battery cell produce __________volts . 2.0 2.5 2.1 2.3
2.1
What is the recommended procedure when cranking a vehicle that is reluctant to start? Crank for 30 seconds and then wait for 2 minutes before cranking again. Crank for 2 minutes and then wait for 30 seconds before cranking again. Crank for 2 minutes and then wait 20 minutes before cranking again. Crank for 15 seconds and then wait for 30 minutes before cranking again.
Crank for 30 seconds and then wait for 2 minutes before cranking again.
If the electrolyte level is lost through evaporation, what should be added? Sulfate crystals Calcium Distilled water Acid
Distilled water
____________ are current draws on the battery when the ignition is switched off. Cranking amps Key-off electrical loads Electrical reserve capacities Cold cranking amps
Key-off electrical loads
Which of the following should be the first priority when working around and servicing batteries? Disconnecting the battery terminals Deciding what tests to do Performing visual checks Safety
Safety
What substance can be used to effectively neutralize electrolyte spills? Calcium Sodium bicarbonate Water Lithium
Sodium bicarbonate
When connecting jumper cables, what will almost always occur on the last connection you make? Spark Parasitic current draw Voltage spikes Battery failure
Spark
Which of the following occurs when batteries are subjected to prolonged undercharge conditions? Excessive vibration Grid corrosion Shedding Sulfation
Sulfation
Which of the following would result when two batteries are connected in series? Nothing, if both batteries have the same CCA and nominal voltage Current capability doubles. Voltage and current both double. Voltage doubles.
Voltage doubles
In a battery, the electrolyte level should be ________ the plates. below even with above around
above
. Battery testing is recommended whenever a(n) ___________ is replaced. capacitor alternator connector battery cable
alternator
The amount of __________ a battery supplies is a function of the surface area of the plates. resistance discharge amperage voltage
amperage
Trickle chargers charge a battery at a low ___________. amperage rate resistance connection voltage disconnect electrolyte level
amperage rate
What information must be input for a typical automated battery tester to evaluate battery performance? starter motor type ambient temperature electrolyte specific gravity battery capacity rating
battery capacity rating
When the term gassing is applied to battery performance, which gas(es) is/are being referred to? oxygen hydrogen both oxygen and hydrogen neither oxygen nor hydrogen
both oxygen and hydrogen
Varying the voltage and length of time a pulse is applied to the battery controls the ___________. ampere rate parasitic draw high rate of discharge charging rate
charging rate
The term deep cycling in the context of a battery means: recombination cycling sulfation prolonged overcharging complete discharge followed by full recharge
complete discharge followed by full recharge
Electrolyte inside lead-acid batteries is ___________. excessively hot contaminated explosive corrosive
corrosive
When jump-starting a truck with electronically controlled chassis components, where should the ground be placed? on the frame rail 12 inches from the ground post on the engine cylinder block on the alternator housing bracket on a battery ground post
on a battery ground post
All electrical devices (loads) have internal ____________. combustion venting battery banks resistance
resistance
Although no-maintenance batteries contain a vent located beneath the top cover, the battery tops are completely __________. recharged concealed sealed discharged
sealed
Key-off loads contribute to ________ caused by prolonged discharge. grid corrosion shedding plate deterioration. sulfation
sulfation
Incorrect charging system voltage can cause _________. low electrolyte levels undercharging higher charging voltage high ambient temperatures
undercharging
Lead-acid battery electrolyte is a mixture of sulfuric acid and __________. calcium strontium barium water
water