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Exam 7: Batteries

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Question 21

Multiple Choice

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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?

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

E) A) and B)
F) None of the above

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Question 22

Multiple Choice

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

A) standard lead-acid
B) low-maintenance lead acid
C) maintenance-free lead acid
D) gelled electrolyte

E) B) and D)
F) B) and C)

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Question 23

Multiple Choice

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

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

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

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

If you know that a battery has become sulfated after a long period of inactivity and you want to save it,which of the following methods would be most likely to succeed?

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

What type of battery is used where and isolated battery is required?

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

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

What is SAE metric battery cable of 100 mm equivalent to?

Who invented the first battery?

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

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

When using a portable generator to fast charge a set of discharged batteries on a truck,which of the following would be best practice to get the unit started?

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

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?

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?

Assuming that the electrolyte mixture is correct,which of the following specific gravity readings would indicate that a lead-acid battery was completely dead?