Question 1

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

Accepted Answer

A)  battery explosion 
B)  damage to the truck electronics 
C)  damage to the alternator 
D)  all of the above 
A)  battery explosion 
B)  damage to the truck electronics 
C)  damage to the alternator 
D)  all of the above D

Question 2

Which of the following is an advantage of a maintenance-free lead acid battery compared with a similarly sized and rated standard battery?

Accepted Answer

A)  higher CCA 
B)  sustains overcharging without failing 
C)  longer inactivated shelf life 
D)  all of the above 
A)  higher CCA 
B)  sustains overcharging without failing 
C)  longer inactivated shelf life 
D)  all of the above D

Question 3

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

Accepted Answer

A)  loose belt (s) 
B)  defective diode trio 
C)  residual magnetism in the rotor 
D)  all of the above 
A)  loose belt (s) 
B)  defective diode trio 
C)  residual magnetism in the rotor 
D)  all of the above D

Question 4

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

Accepted Answer

A)  replace the battery 
B)  charge at high amperage 
C)  heat with a propane torch 
D)  trickle charge and observe response 
A)  replace the battery 
B)  charge at high amperage 
C)  heat with a propane torch 
D)  trickle charge and observe response

Question 5

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

Accepted Answer

A)  overcharging 
B)  undercharging 
C)  deep-cycling 
D)  all of the above 
A)  overcharging 
B)  undercharging 
C)  deep-cycling 
D)  all of the above

Question 6

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

Accepted Answer

A)  ampere-hour rating 
B)  reserve capacity 
C)  cold cranking amps 
D)  none of the above 
A)  ampere-hour rating 
B)  reserve capacity 
C)  cold cranking amps 
D)  none of the above

Question 7

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

Accepted Answer

A)  1/2 of the CCA rating for 15 seconds 
B)  100% of the CCA rating for 30 seconds 
C)  1/2 of the amp/hour rating for 45 seconds 
D)  1/2 of the amp/hour rating for 15 seconds 
A)  1/2 of the CCA rating for 15 seconds 
B)  100% of the CCA rating for 30 seconds 
C)  1/2 of the amp/hour rating for 45 seconds 
D)  1/2 of the amp/hour rating for 15 seconds

Question 8

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

Accepted Answer

A)  SAE metric 80 mm 
B)  SAE metric 60 mm 
C)  SAE 2/0 or 00 
D)  SAE 1/0 or 0 
A)  SAE metric 80 mm 
B)  SAE metric 60 mm 
C)  SAE 2/0 or 00 
D)  SAE 1/0 or 0

Question 9

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?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both technicians A and B 
D)  Neither technicians A nor B 
A)  Technician A 
B)  Technician B 
C)  Both technicians A and B 
D)  Neither technicians A nor B

Question 10

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

Accepted Answer

A)  ambient temperature 
B)  CCA 
C)  starter motor type 
D)  specific gravity reading 
A)  ambient temperature 
B)  CCA 
C)  starter motor type 
D)  specific gravity reading

Question 11

When testing specific gravity of a lead-acid battery,which of the following produces a reading that is not influenced by the actual temperature of the electrolyte?

Accepted Answer

A)  built-in hydrometer 
B)  glass bulb hydrometer 
C)  plastic float type hydrometer 
D)  refractometer 
A)  built-in hydrometer 
B)  glass bulb hydrometer 
C)  plastic float type hydrometer 
D)  refractometer

Question 12

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

Accepted Answer

A)  atomic mass 
B)  specific gravity 
C)  relative gravity 
D)  liquid mass 
A)  atomic mass 
B)  specific gravity 
C)  relative gravity 
D)  liquid mass

Question 13

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

Accepted Answer

A)  64% sulfuric acid,36% distilled water 
B)  36% sulfuric acid,64% distilled water 
C)  100% sulfuric acid 
D)  100% distilled water 
A)  64% sulfuric acid,36% distilled water 
B)  36% sulfuric acid,64% distilled water 
C)  100% sulfuric acid 
D)  100% distilled water

Question 14

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?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 15

On current trucks with data bus driven electronics,where is recommended you should place the ground clamp from a battery charger or when boosting?

Accepted Answer

A)  on the starter ground post 
B)  on the frame rail 
C)  directly on the alternator post 
D)  directly on the battery ground post 
A)  on the starter ground post 
B)  on the frame rail 
C)  directly on the alternator post 
D)  directly on the battery ground post

Question 16

When inspecting a lead-acid battery with an integral hydrometer,you can see the colored dot is yellow through the sight glass.What does this tell you?

Accepted Answer

A)  Battery is fully discharged 
B)  Battery is fully charged 
C)  It is safe to charge the battery 
D)  Discard the battery 
A)  Battery is fully discharged 
B)  Battery is fully charged 
C)  It is safe to charge the battery 
D)  Discard the battery

Question 17

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

Accepted Answer

A)  distilled water 
B)  pure sulfuric acid 
C)  water and sulfuric acid solution 
D)  water and hydrochloric acid solution 
A)  distilled water 
B)  pure sulfuric acid 
C)  water and sulfuric acid solution 
D)  water and hydrochloric acid solution

Question 18

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?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 19

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?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 20

When load testing a fully charged,lead-acid battery at 80 degrees Fahrenheit at one half the rated CCA for 15 seconds,what is the lowest acceptable voltage during the test?

Accepted Answer

A)  8.5 volts 
B)  9.6 volts 
C)  10.2 volts 
D)  12.6 volts 
A)  8.5 volts 
B)  9.6 volts 
C)  10.2 volts 
D)  12.6 volts

Exam 7: Batteries

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

Which of the following is an advantage of a maintenance-free lead acid battery compared with a similarly sized and rated standard battery?

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

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

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

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

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

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

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?

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

When testing specific gravity of a lead-acid battery,which of the following produces a reading that is not influenced by the actual temperature of the electrolyte?

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

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

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?

On current trucks with data bus driven electronics,where is recommended you should place the ground clamp from a battery charger or when boosting?

When inspecting a lead-acid battery with an integral hydrometer,you can see the colored dot is yellow through the sight glass.What does this tell you?

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

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?

When load testing a fully charged,lead-acid battery at 80 degrees Fahrenheit at one half the rated CCA for 15 seconds,what is the lowest acceptable voltage during the test?

Introduction to Servicing Heavy-Duty Trucks

Shop Safety and Operations

Tools and Fasteners

Preventive Maintenance Program

Fundamentals of Electricity

Fundamentals of Electronics and Computers

Charging Systems

Cranking Systems

Chassis Electrical Circuits

Diagnosis and Repair of Electronic Circuits

Multiplexing

Hydraulics

Clutches

Standard Transmissions

Standard Transmission Servicing

Torque Converters

Automatic Transmissions

Automatic Transmission Maintenance

Electronically Automated Standard Transmissions

Electronically Controlled Automatic Transmissions Ecats

Driveshaft Assemblies

Heavy-Duty Truck Axles

Heavy-Duty Truck Axle Service and Repair

Steering and Alignment

Suspension Systems

Wheels and Tires

Truck Brake Systems

Hydraulic Brakes and Air-Over-Hydraulic Brake Systems

Abs and Ebs

Air Brake Servicing

Vehicle Chassis Frame

Heavy-Duty Truck Trailers

Fifth Wheels and Coupling Systems

Heavy-Duty Heating, ventilation, and Air Conditioning Systems

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