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Batteries, Inverters, Semiconductors and Rectifiers


Quiz Questions

1.A typical lead-acid battery consists of __________ lead-acid cells in a case.
4
6
8
10
2. Battery life cycle is defined as the number of complete charge/discharge cycles a battery can perform before its normal charge capacity falls below _________ of its initial rated capacity.
40%
60%
80%
3.When a battery is tested using a hydrometer, the temperature of the electrolyte must be taken into consideration.
True
False
4.The multiphase inverter is ____________ for the same power rating than the single phase, but there are complications in distributing multiphase power and in keeping the loads balanced.
Lighter
Heavier
Similar
5.______________ use a rotor made of soft iron laminations with grooves cut laterally across the surface to provide poles that correspond to the number of stator poles.
Static inverters
Inductor type Rotary inverter
Magnetic type Rotary inverter
All the above
6. Which of the following are features of Static inverters?
High efficiency
Low maintenance, long life
Extremely quiet operation
All the above
7.

_______________ is the process by which small amounts of additives called impurities are added to the semiconductor material to increase their current flow by adding a few electrons or a few holes.

Doping
Damping
Shunting
None of the above
8. The essential characteristic of Germanium and silicon is that each atom has __________ valence electrons to share with adjacent atoms in forming bonds.
Four
Six
Eight
Ten
9.The liquid crystal display (LCD) requires less power to operate over the Light-Emitting Diode (LED).
True
False
10.An N-type semiconductor material is one that is doped with_________________.
P-type impurity
Donor impurity
Acceptor impurity