Ch15 Advanced Battery Technologies - Q&A

2. Battery management systems (BMS) are designed to perform all of the following functions, EXCEPT: A. Adjust battery voltage B. Prolong the life of the battery. C. Protect the cells or the battery from damage D. Maintain the state of charge for the battery to perform the specified work.

A. Adjust battery voltage. P351

4. Charging and discharging resistance changes with battery use and the electrical distance from the ____. A. Alternator B. Capacitor C. Ignition switch D. Isolator relay

A. Alternator

1. What is critical for series-connected battery cells in hybrid vehicle applications? A. Charge equalization B. Amperage protection C. Internal resistance D. Reverse polarity protection

A. Charge equalization

5. All of the following are procedures to follow in the event of a burning Li-ion battery, EXCEPT: A. Pour water on the battery B. Use a CO2 extinguisher. C. Use a foam-type extinguisher D. Let the battery burn out on its own.

A. Pour water on the battery is the Correct Answer.

** 2. Technician A says a battery isolator allows for limp-home operation. Technician B says a battery modulator compensates for unequal battery voltage. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

A. Tech A

10. Battery monitors typically collect all of the following data, EXCEPT: A. Temperature of each battery B. Voltage of the pack C. Diagnostic information on battery/cell condition D. Rate of charge or discharge

A. Temperature of each battery is NOT correct. C. Diagnostic information on battery/cell condition IS Correct.

3. What battery has the longest service life of all lead-acid battery type? A. VRLA B. NiMH C. Li-ion D. Nickel cadmium

A. VRLA

3. Li-ion batteries have higher cell ____. A. Voltages B. Connections C. Amperage's D. Capacity

A. Voltages

2. LFP batteries have been preferred for electric vehicles because they have a favorable trade-off between cost and the high discharge rates required for low weight, longer life, and ____. A. Capacity B. Cell voltage C. Cooling D. Acceleration

B. Cell voltage is NOT the answer. A. Capacity is correct answer.

4. Which of the following is a disadvantage of current Li-ion battery technology? A. Can discharge current faster B. Cost C. Low internal resistance D. Higher cell voltages

B. Cost

5. Which of the following is an advantage of NiMH batteries over other battery types? A. Electrodes are made from an unusual alloy from a group of rare earth metals. B. Lighter weight as compared to lead-acid batteries. C. Commonly used in laptops and cell phones D. More high-end as compared to lithium batteries.

B. Lighter weight as compared to lead-acid batteries.

3. Which of the following is NOT correct concerning NiMH batteries? A. Allison EV heavy-duty hybrids use these, as do many automotive electric hybrid systems. B. NiMH batteries provide only one-fourth the power of lead-acid batteries, at 0.6 volts per cell. C. The negative electrode is made of nickel hydroxide (NiOH2). D. The electrolyte is composed of an alkaline.

B. NiMH batteries provide only one-fourth the power of lead-acid batteries, at 0.6 volts per cell.

5. On onboard battery management system adjusts the battery state of charge to enable regenerative braking charges to be absorbed without ____. A. Isolating the batteries B. Overcharging the battery C. Charging the vehicle operating mode D. Changing the rate of charge

B. Overcharging the battery. P351

3. The dielectric material in an ultra-capacitor is double layered and is made from ____ . A. Nickel-metal hydride B. Porous carbon C. Lithium D. Fiberglass

B. Porous carbon. P346

1. Technician A says gel-cell batteries cannot be considered spill-proof batteries. Technician B says gel-cell batteries are sensitive to overcharging and can be ruined by overcharging. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

B. Tech B

1. When discussing Nickel-metal hydride (NiMH) batteries, Tech A says the negative electrode is formed from NiOH2, while the positive electrode is NiOH. Tech B says the negative electrode material has a unique ability to absorb hydrogen. Who is correct? Technician A says Technician B says . Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

B. Tech B is correct.

5. Tech A says AGM batteries are not pressurized internally. Tech B says AGM batteries will be damaged if charged at greater than 13.2 volts. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

C is NOT correct. D. Neither Tech nor Tech B IS the answer. Tech A is false. P345. Tech B is false.

1. Ultra-capacitors are currently used to assist batteries for the first 1.5 seconds during cranking, where they can supply an additional ___ amps of current to supplement the starter batteries. A. 500 B. 1000 C. 2000 D. 4000

C. 2000

5. What type of batteries can charge up to 5 x faster than the rate of conventional lead-acid batteries? A. SLI B. NiMH C. AGM D. VRLA

C. AGM. P344

** 3. Technician A says when a battery voltage drop occurs, an audible warning alerts the vehicle operator, who then triggers the low-voltage disconnect (LVD) device. Technician B says LVD devices preserve battery current to a level adequate to start the vehicle's engine when key-off loads or other parasitic draws are draining the battery. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

C. Both Tech A and Tech B

4. Technician A says there is no cable corrosion with a VRLA battery. Technician B says a VRLA battery has the longest service life of all lead-acid battery types . Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

C. Both Tech A and Tech B

2. Technician A says ultra-capacitors are particularly advantageous in situations requiring regenerative braking and in frequent stop-start systems, such as in electric and hybrid vehicles. Technician B says unlike other battery technologies, ultra-capacitors are not worn out by continuous charge and discharge cycles. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

C. Both Tech A and Tech B. P346.

1. Technician A says many commercial vehicles use multiple battery banks that can be separated according to function. Technician B says a commercial vehicle has one battery bank of starting, lighting and ignition (SLI) batteries for the starting and main vehicle operating system, and another for auxiliary deep-cycle batteries for accessories. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

C. Both Tech A and Tech B. P348

4. Battery monitors typically collect all of the following data, EXCEPT: A. Temperature of each battery B. Voltage of the pack C. Diagnostic information on battery cell condition D. Rate of charge or discharge

C. Diagnostic information on battery cell condition. P351

4. Among lithium batteries, what is a major advantage of LFP batteries? A. Plating can occur if the charge rate becomes high. B. Undercharging can reverse the electrode polarity. C. It is the most chemically stable. D. The insulating separator between the positive and negative electrodes is impenetrable.

C. It is the most chemically stable.

1. What type of battery has twice the power density per kilogram of weight compared to NiMH chemistry? A. Absorbed glass mat B. Spiral-wound cell C. Li-ion D. VRLA

C. Li-ion

5. A microcontroller-operated battery management system is required for ___ batteries to prevent damage and extend life cycle. A. Absorbed glass mat B. Spiral-wound cell C. Li-ion D. VRLA

C. Li-ion

2. All of the following are procedures to follow in the event of a burning Li-ion battery, EXCEPT: A. Pour water on the battery. B. Use a CO2 extinguisher C. Use a foam-type extinguisher D. Let the battery burn out on its own.

D is NOT the answer. A. Pour water on the battery IS the correct answer.

4. Which of the following are electrical devices known for their ability to temporarily store short bursts of electrical energy? A. Balancers B. Battery equalizers C. Smart chargers. D. Capacitors

D. Capacitors. P346

5. Ultra-capacitors store electrical energy within ___ . A. Fiberglass plates B. Battery isolators C. Battery banks D. Electrostatic fields

D. Electrostatic fields. P346

2. What type of battery is created by adding silica powder to the electrolyte? A. Absorbed glass mat B. Lithium-ion C. Spiral-wound cell D. Gel cell

D. Gel cell

4. Spiral cell batteries are produced in three categories, designated by the color of the battery's top cover. What does a blue top designate? A. Deep-cycle battery B. 12-volt SLI battery C. Combination deep-cycle and SLI or leisure battery D. Gel cell battery

D. Gel cell battery is NOT Correct. A. Deep-cycle battery IS correct. P346.

2. All of the following are advantages of the electrolyte used in NiMH batteries, EXCEPT: A. It lowers the battery's freezing temperature B. It can produce more amounts of pure hydrogen than other electrolytes. C. It allows the nickel alloy plates to remain clean. D. It produces a lot of sediment

D. It produces a lot of sediment.

** 5. Technician A says rotating the position of batteries will not correct the condition of unequal charge rates. Technician B says batteries will not charge and discharge unevenly in multiple battery configurations, thereby shortening battery life. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

D. Neither Tech A nor Tech B

2. Technician A says currently there are dozens of different cell chemistries used to produce lithium-ion batteries. Technician B says lithium-ion batteries have liquid electrolyte similar to lead-acid batteries. Who is correct? A. Technician A B. Technician B C. Both Technician A and Technician B D. Neither Technician A nor Technician B

D. Neither Technician A nor Technician B is NOT correct. A. Tech A IS correct.

1. What type of batteries provides twice the energy storage of lead-acid by weight, but only half the power density? A. Spiral-wound cell B. Absorbed glass mat C. Lithium-ion D. NiMH

D. NiMH

4. In NiMH batteries, the electrolyte is composed of ____. A. Manganese oxide B. Lithium phosphate C. Nickel oxide D. Potassium hydroxide

D. Potassium hydroxide

3. A hybrid battery management system will perform which of the following functions? A. Provide the highest vibration resistance B. Enable no tray corrosion C. Prolong the life of the battery D. Provide reverse polarity protection

D. Provide reverse polarity protection. P351