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