NEETS MODULE 1; CHAPTER 2,3.

Question 1

A battery consist of a number of ___ assembled in a common container and connected together to function as a source of electrical power.

Answer 1

Cells

Question 2

A cell is a device that transforms chemical energy into _____.

Answer 2

electrical energy.

Question 3

The _____ are the conductors by which the current leaves or returns to the
electrolyte.

Answer 3

Electrodes

Question 4

______ is the solution that acts upon electrodes

Answer 4

Electrolyte

Question 5

Primary Cell?

Answer 5

A primary cell is one in which the chemical action eats away one of the electrodes,
usually the negative electrode.

Question 6

Secondary Cell?

Answer 6

A secondary cell is one in which the electrodes and the electrolyte are altered by the
chemical action that takes place when the cell delivers current.

Question 7

another name for cathode?

Answer 7

Negative electrode

Question 8

another name for anode?

Answer 8

positive electrode

Question 9

Initial Charge?

Answer 9

a long low-rate initial charge

Question 10

Normal Charge?

Answer 10

A normal charge is a routine charge that is given in accordance with the nameplate data
during the ordinary cycle of operation to restore the battery to its charged condition.

Question 11

Equalizing Charge?

Answer 11

An equalizing charge is a special extended normal charge that is given periodically to
batteries as part of a maintenance routine

Question 12

Floating Charge?

Answer 12

The floating charge is used to keep a battery at full charge while
the battery is idle or in light duty

Question 13

Fast Charge?

Answer 13

A fast charge is used when a battery must be recharged in the shortest possible time.

Question 14

hydrometer?

Answer 14

To measure the amount of active ingredient in the electrolyte.

Question 15

How is the type of battery most easily determined?

Answer 15

By looking at the nameplate data.

Question 16

ohms law?

Answer 16

The current in a circuit is DIRECTLY proportional to the applied voltage and
INVERSELY proportional to the circuit resistance.

Question 17

ohms law formulas?

Answer 17

I = E/R

E= I x R

R=E/I

I = current in amperes
E = voltage in volts
R = Resistance in ohms

Question 18

Power formulas?

Answer 18

P = E x I

Question 19

If violent gassing occurs during a battery charge, what action should be taken?

Answer 19

. Reduce the charging rate

Question 20

Can a battery be recharged by adding more electrolyte?

Answer 20

No, a current must be passed through the battery.

Question 21

. What factors should be considered when selecting a primary cell for a power
source?

Answer 21

Cost, size, ease of replacement, and voltage or current needs.

Question 22

one horsepower is equal to?

Answer 22

746 watts

Question 23

Is it considered safe for a person to touch any energized low-voltage conductor with the bare hand?

Answer 23

NEVER! All energized electric circuits should be considered potentially dangerous.

Question 24

What information must be known to determine the component values for a voltage divider?

Answer 24

the source voltage and load requirements (voltage and current).

Question 25

What is the effect on total resistance and total current in a circuit if a short occurs in (a) a parallel branch, and (b) in a series portion?

Answer 25

(a) Total resistance decreases, total current increases (b) Total resistance decreases, total current increases.

Question 26

What is the effect on total resistance and total current in a circuit if an open occurs in (a) a parallel branch, and (b) in a series portion?

Answer 26

(a) Total resistance increases, total current decreases (b) Total resistances becomes infinite, total current is equal to zero.

Question 27

The total power in both series and parallel circuits is computed with the formula: PT= P1 + P2 + P3 + …PN. Why can this formula be used for both series and parallel circuits?

Answer 27

In both cases all the power used in the circuit must come from the source.

Question 28

What term identifies a single resistor that represents total resistance of a complex circuit?

Answer 28

Equivalent resistor or Req

Question 29

In applying Kirchhoff’s current law, what does the polarity of the current indicate?

Answer 29

Whether the current is entering the junction (+) or leaving the junction (-)

Question 30

What condition gives maximum power transfer from the source of the load?

Answer 30

When the load resistance equals the source resistance.

Question 31

Why will a meter indicate more voltage at the battery terminal when the battery is out of a circuit than when the battery is in a circuit?

Answer 31

The internal (source) resistance of the battery will drop some of the voltage.

Question 32

What is a short circuit?

Answer 32

An accidental path of low resistance which passes an abnormally high amount of current.

Question 33

what is an open circuit?

Answer 33

A circuit where there is no longer a complete path for current flow.

Question 34

When using Kirchhoff’s voltage law, how are voltage polarities assigned to the voltage drops across resistors?

Answer 34

The point at which current enters the resistor is assigned a negative polarity and the point at which current leaves the resistor is assigned a positive polarity.

Question 35

What is the term applied to the rate at which a mechanical or electrical force causes motion?

Answer 35

Power.