Workbook, Heavy Duty Truck Systems, 6E
Chapter Seven – Answer Key
1. Technician A says that 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 only occurs during battery discharge cycles on
maintenance-free batteries. Who is correct?
2. Rapid charge and discharge cycling of a battery is known as:
3. Which of the following battery electrolyte conditions would be most likely to cause a
battery to freeze in winter conditions?
4. Which of the following is true of vehicle batteries?
5. Which of the following batteries categories would function upside down?
6. The positive plates in a lead-acid battery are known as:
7. The negative plates in a lead-acid battery are known as:
8. Which of the following instruments would produce the most accurate measurement of the
specific gravity of battery electrolyte?
9. Technician A says that when using a hydrometer to test the specific gravity of battery
electrolyte, the reading must be temperature corrected. Technician B says that a
refractometer measures the refractive index of electrolyte that increases proportionally
with density. Who is correct?
10. Technician A says that most truck OEMs use the CCA specification of a battery as their
primary method of rating it. Technician B says that some fleets use ampere-hour rating of
a battery when spec’ing it. Who is correct?