Mod 4, 5, 6

Question 1

What is a Switch

Answer 1

A switch consists of an actuator and one or more sets of contacts. The contacts are opened or closed by the physical movement of the actuator

Question 2

Single-pole, single-throw

Answer 2

single input contact and a single output contact.

Question 3

Single-Pole, Double-Throw

Answer 3

single input contact and two output contacts.

Question 4

Double-Pole, Single-Throw

Answer 4

two input contacts and a single output contact associated with each input contact.

Question 5

Double-Pole, Double-Throw

Answer 5

two input contacts and two output contacts associated with each input contact.

Question 6

Alternate Action Switch

Answer 6

remains in its free or operating position indefinitely until released.

Question 7

Momentary Contact Switch

Answer 7

returns to its free position immediately after the operating force is removed.

Question 8

Rotary Switch

Answer 8

contain a shaft actuator that is rotated to open or close the contacts

Question 9

Switch Gangs

Answer 9

is any number of independent switches whose actuators are linked mechanically forcing them to act simultaneously.

Question 10

Microswitches

Answer 10

will open or close a circuit with a very small movement of the tripping device (1/16 inch or less).

Question 11

Derating Factors

Answer 11

Circuits containing incandescent
Inductive circuits have magnetic energy
Direct-current motors will draw

Question 12

what is Relay

Answer 12

sets of contacts that are opened or closed by the electromagnetic action of a coil,allow a low power control voltage operate a high power switch

Question 13

The minimum amount of current required to activate a relay ?

Answer 13

Pick up current

Question 14

normally closed contact are closed in

Answer 14

no operation position

Question 15

A Diode with both ways resistance is probably

Answer 15

shorted

Question 16

what is the is a circuit breaker designed to protect

Answer 16

wire

Question 17

The Cathode in a Diode is positive or negative

Answer 17

negative

Question 18

the bias voltage in a silicon semiconductor is ?

Answer 18

0.7 volts

Question 19

the 3 connectors on the transistor is

Answer 19

base emitter collector

Question 20

main different in a fuse and circuit breaker

Answer 20

circuit breaker can be reset

Question 21

a secondary cell can be recharged

Answer 21

yes, a primary cant

Question 22

to increase the voltage of 2 batteries you should hook them in parallel ? false or true

Answer 22

false

Question 23

the negative part of a batteries is known as ?

Answer 23

Cathode

Question 24

the closed circuit voltage of a battery we always be higher than the open circuit voltage true or false

Answer 24

false

Question 25

to increase the current output of 2 batteries you should

Answer 25

connected in parallel

Question 26

if a transistor is on what is the voltage between the base and emitter

Answer 26

0.7 volts

Question 27

what is rectifier Diode use for

Answer 27

These circuits convert the AC power to DC used by the equipment

Question 28

zener diodes are use to

Answer 28

keep voltage constant

Question 29

Seven Steps for Troubleshooting

Answer 29

1) Identify the problem 2) Gather all types of data 3) Get a plan of attack 4) Find the fault 5) Repair or replace the component 6) Test the system after the repair 7) Paperwork, paperwork, paperwork

Question 30

Discharge capacity

Answer 30

Is a measure of the energy available from the cell, expressed as a product of current and time Ah or mAh

Question 31

A batteries are consider discharge when the voltage drop to ?

Answer 31

1.2 volts

Question 32

Nickel-Cadmium Cells can be recharged how many times ?

Answer 32

500 or more

Question 33

cells types

Answer 33

primary - one use | secondary -rechargeable

Question 34

Lead-Acid Cells

Answer 34

may be wet or dry. Wet cells use two different forms of lead as electrodes in a weak sulphuric acid electrolyte

Question 35

Open circuit voltage (OCV)

Answer 35

is the voltage measured across a battery when no load is applied.

Question 36

closed circuit voltage is

Answer 36

voltage measured across a battery when a load is applied

Question 37

What does the term closed-circuit voltage mean in regard to a battery?

Answer 37

the voltage measured while a load is applied to the battery

Question 38

Equation to calculate the length of operation of a battery

Answer 38

time = (ampere-hour)/current

Question 39

What happens to the internal resistance of a battery as it becomes discharged?

Answer 39

increases

Question 40

What is a positively charged electrode called in a battery

Answer 40

anode