ch 7 review

What electrolyte specific gravity measured at 80 degrees Fahrenheit should indicate that a lead-acid battery is charged

1.265

When testing a lead-acid battery, which of the following would be the recommended load to be drawn by a carbon pile?

1/2 of the CCA rating for 15 seconds

Which of the following represents the correct mixture proportions required of the electrolyte in a lead acid battery?

36% sulfuric acid, 64% distilled water

When load testing a fully charged lead-acid battery at 80 degrees what is the lowest voltage accepted

9.6 volts

Technician A says that wet cell battery gassing produces an explosive mixture of hydrogen and oxygen and that great care should be taken any time a battery is being charged. Technician B says that gassing occurs only during battery discharge cycles on maintenance-free batteries. Who is correct?

A) Technician A

Technician A says that a sulfated battery is less likely to freeze in extreme cold temperatures. Technician B says that a sulfated battery often measures an abnormally high voltage across its terminals immediately after charging. Who is correct?

B) Technician B only

Technician A says that a defective voltage regulator can result in overcharging the batteries. Technician B says that when batteries are overcharged, they can boil off electrolyte. Who is correct?

C) Both A and B

Technician A says that a recombinant battery is usually required where an isolated battery is specified. Technician B says that gelled electrolyte batteries are much less likely to produce corrosion on the battery posts and terminals. Who is correct?

C) Both A and B

Technician A says that battery cells requiring frequent topping up is an indicator of over-charging. Technician B says that voltage regulators should not be set above 14.1 volts on many current trucks. Who is correct?

C) Both A and B

Technician A says that it is acceptable to load test a sealed lead-acid battery providing the temperature is not below 32 degrees Fahrenheit. Technician B says that BCI recommends that carbon pile testing should be performed by loading the battery at one half of the specified CCA rating. Who is correct?

C) Both A and B

When using a Midtronics type capacitance tester to evaluate battery performance, which data MUST be input?

CCA

When replacing a battery, which is the recommended sequence to use in disconnecting and re-connecting the cables?

Disconnect the ground cable first and re-connect it last

When inspecting a lead-acid battery with an integral hydrometer, you can see the colored dot is yellow through the sight

Electrolyte is low

When preparing to load test a lead-acid battery, the technician should?

Fully charge the battery before attempting to test it

Which of the following battery cables would have the largest sectional diameter?

SAE metric 80 mm

Which of the following would be a consequence of reversing the polarity of a battery bank on truck electrical system?

all of the above, battery explosion, damage to the truck electronics, damage to the alternator

Which of the following is an advantage of a maintenance-free lead acid batteries

all of the above, higher CCA, sustains overcharging without failing, longer inactivated shelf life

Which of the following conditions could result in an undercharged batteries?

all of the above, loose belt (s), defective diode trio, residual magnetism in the rotor

Which of the following conditions can shorten the life of a heavy-duty, wet cell, lead acid battery?

all of the above, overcharging, undercharging, deep-cycling,

What solution is recommended to neutralize and clean corrosion from battery posts and terminals?

baking soda and water

Which of the following statements about a standard lead-acid battery is true when compared with maintenance-free battery

better ability to handle deep-cycling

What is the primary method of rating current truck lead-acid batteries?

cold cranking amps

Which of the following methods is the correct approach to cranking a hard to start truck engine using wet cell battery?

crank for 30 seconds, rest for 2 minutes

On trucks with data bus driven electronics, where should you place the ground clamp from a battery charger or jumper?

directly on the battery ground post

What type of battery is used in an application requiring an isolated battery?

gelled electrolyte

Which of the following battery types can best sustain repeated deep-cycling?

gelled electrolyte

What is a common result of deep-cycling a lead acid battery?

plate buckling

Which of the following defines a galvanic device?

produces voltage by chemical action

What is the main advantage of modern battery conductance test instruments?

reduces the incidence of mis-diagnosed batteries

If the integral charge indicator in a lead-acid battery is clear in color, what should you do?

replace the battery

The term used to describe the weight of a volume of a liquid versus the weight of an equal volume of pure water is:

specific gravity

What is the chemically active matter on the cathode plates of wet cell lead-acid batteries?

sponge lead

If you suspect that a lead-acid battery has frozen, after bringing it to room temperature,what should you do first?

trickle charge and observe response

If you know that a battery has become sulfated what method should you use to try to save the battery?

trickle charge for 2 days

What is the role played by a battery described as an isolated battery in a truck electrical system?

used primarily when engine is off

What is used as electrolyte in a vehicle lead-acid battery?

water and sulfuric acid solution

What temperature is the cold cranking amp capability of a lead-acid based on?

0 degrees Fahrenheit

Technician A says that excessive vibration can shorten the life of a lead-acid battery by shaking the active material from the plates. Technician B says that wet cell truck batteries are designed to sustain high levels of vibration and this seldom causes premature failures. Who is correct?

A) Technician A only

Technician A says that used batteries can be disposed of in the garbage providing the electrolyte is removed first. Technician B says that battery vendors are usually required by law to receive as many batteries for recycling as they sell. Who is correct?

B) Technician B only

Technician A says that adding pure sulfuric acid to a discharged lead-acid battery is a recommended means of reducing the time required to charge it. Technician B says that it is acceptable to add tap water to top-up the electrolyte in a lead-acid battery. Who is correct?

D) Neither A nor B

Who invented the first battery?

Luigi Galvani

Which of the following terms best describes the rapid charge-and-complete discharge cycling of a battery?

deep-cycling

During a wet cell battery charge cycle, what do the water molecules in the electrolyte reduce to?

hydrogen and oxygen

When there are multiple 12-volt batteries in a bank, how must they be connected in a truck with a voltage of 12 volts?

in parallel

What is the chemically active matter on the anode plates of wet cell, lead-acid batteries?

lead peroxide

Which of the following is the battery manufacturer's recommended method of removing the surface charge from a battery

load at 300 amps for 15 seconds