Electrical

What is a an electrochemical equivalent?

The mass of an electrode used divided by the charge it produces (z=m/Q)

What is the efficiency of an accumulator?

The amount of energy discharged divided by the amount recieved during recharge

What is a CCA rating?

The col cranking amps is the current a lead-acid battery at -18 can suppluy for 30s and mmaintain 1.2 volts per cell

What is ampacity?

The maximum current that can be handled by a conductor?

What is resistivity?

The resistance for a conductor directly proportional to its length and inversly proportional to its area

What are advantages of a lead-acid battery?

Low cost, Better cooling due to liquid electrolyte, Can handle higher surges

What are the four stages of battery charging?

Bulk, Absorbption, Float, and Equalization

What are some construction requirements for a battery room?

Dry and well ventilated, Externally fitted light, Corrosion resistant paint, Temperature should be 15 - 20 C, and Not next to emergency power

What is the brightness for an incandescent lamp?

10 - 17 lumen/watt

What is the brightness for a halogen lamp?

15 - 25 lumen/watt

What is the brightness for a gas discharge lamp?

50 - 150 lumen/watt

What is the brightness for an LED?

1 - 84 lumen/watt

What factors impact the internal resistance of a circuit?

Effective area of the electrodes, Concentration of the electrolyte, and the Temperature