As part of battery testing a routine battery tests must be done _________________

at least once every three months

at least once every four months

What could happen if battery terminal links are loose connections ?

High resistance in the cell connections.

Corrosion to build up to the terminals.

Why do you need to apply equalizing charge to battery?

to correct Sulfation on battery

Recharge any cell in which there has been internal discharge

Keeps the battery at full Voltage.

Supplies Ac directly to the load.

What must be done before replacing a faulty cell while battery bank in service?

provide an Alternate current path before removing the link

provide new battery in parallel to the bank

add one more battery in series to the bank

provide a Direct current path after removing the link

What happens if one cell in battery bank has low much lower specific gravity than the other cells?

It drains power from the battery bank and reduce its life

When put an equalizing charge on a battery bank?

If the specific gravity of any cell drops more than 10 points below the average.

If the specific gravity of one cell drops more than 10 points below the average

If the specific gravity of three cell drops more than 10 points below the average.

If the specific gravity of two cell drops more than 10 points below the average.

If the ambient temperature increases in the battery room .what is the effect?

Increases the rate of cell discharge.

Slow down the electrolyte action of the cells.

Increases the output voltage of the cells.

Put impurities in the electrolyte.

If find sign of discoloration on the plates, or sediment on the electrolyte. What you should do?

Place an equalizing charge on the battery bank.

Add extra sulfuric acid to the electrolyte.

Add baking soda to the electrolyte.

When on cell has an electrolyte specific gravity more than 10 points (0.010) below the other cells, you should_______________

Put equalizing charge on the battery bank.

Put a float charge on the battery.

What you should do to prevent sulfation ?

Electrolyte level must be kept between high and low level.

You should over charge the cells.You should over charge the cells.

Clean and sad petroleum jelly on the terminals cells

Loose the cell’s terminal connections.

What is the effect ambient high temperature in a cell’s chemical activity?

The cell producing excess gas and a high discharge

The cell will drop ,reducing overall performance

If the specific gravity of one cell drops more than 10 points below the average.

If the specific gravity of three cell drops more than 10 points below the average

What is the effect ambient Low temperature in a cell’s chemical activity?

The cell will drop ,reducing overall performance

The cell producing excess gas and a high discharge

If the specific gravity of one cell drops more than 10 points below the average.

If the specific gravity of three cell drops more than 10 points below the average

Refer the figure shown. What Happen during the Positive half of ac cycle?

The diode is forward biased allowing current flow

The diode is forward biased allowing no current flow

The diode is reverse biased allowing no current flow

The diode is reverse biased allowing current flow

Refer the figure shown. What Happen during the Negative half of ac cycle?

The diode is reverse biased allowing no current flow

The diode is forward biased allowing no current flow

The diode is forward biased allowing current flow

The diode is reverse biased allowing current flow

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Makki Al-Marhoon

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Electrolyte concentration and temperature of cells

Specific gravity, temperature and voltage of cells

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Unit 3 Revision 2

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What do you call the effect of the cell size and weight on a battery?

What does the battery’s Capacity effect?

What is the factor that determines a Battery’s Capacity?

What is the factor that determines a Battery’s Capacity?

What is the factor that determines a Battery’s Capacity?

What is the factor that determines a Battery’s Capacity?

Standard battery testing procedures include measuring of:

As part of battery testing a routine battery tests must be done _________________

Why do you measure cell electrolyte specific gravity?

What is the peak output voltage of lead acid cells?

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