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Mech Tech > Mech Tech II MId Term > Flashcards

Mech Tech II MId Term Flashcards

1
Q

A ______ is an electronic component that can be used to store electric charge

A

capacitor

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2
Q

Solder is an allow of what two metals

A

Tin and Lead

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3
Q

What is the melting point of 60/40 solder

A

361

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4
Q

what is the typical wattage of a soldering iron used in electronic application

A

25-30

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5
Q

Voltage:

A

forces current through the circuit

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6
Q

Current is

A

Electricity flowing through the circuit

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7
Q

Resistance is:

A

The measurement of resistance

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8
Q

Current is measured in

A

amps

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9
Q

Resistance is measured in

A

ohms

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10
Q

Electrical pressure is measured in

A

volts

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11
Q

The amount of work that is accomplished in a circuit is measured in

A

watts

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12
Q

A complete circuit is a path that includes a source, insulated conductors, and a load

A

True

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13
Q

An insulator allows the easy transfer of electrons

A

False

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14
Q

A conductor resists the flow of electrons

A

False

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15
Q

Which of the following is not required for a complete circuit

A

A relay

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16
Q

Adding resistance in series to a circuit will cause

A

less current to flow

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17
Q

A short circuit could cause a

A

Fuse to blow, discharged batter, and circuit breaker to open

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18
Q

Which of the following is classified as a circuit protector

A

A fuse, circuit breaker, a fusible link

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19
Q

An example of a load would be

A

A motor

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20
Q

If a circuit is said to be open, current will be flowing through it

A

False

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21
Q

Series resistance always adds up in the circuit

A

True

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22
Q

In a parallel circuit, there is only one path for current to flow

A

False

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23
Q

In a series circuit, there are multiple paths for a current to flow

A

False

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24
Q

A voltmeter is always wired in ________ with the load

A

Parallel

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25
Q

Most digital meters display an OL if the voltage input exceeds scale, What does OL signify

A

The meter cannot read the voltage because it is out of limits

26
Q

Technician A states that a digital meter is preferred to an analog meter with dealing with sensitive computer circuits. Technician B states that an analog meter might load down a computer circuit. Who is correct?

A

Both Technician A and B

27
Q

A reading of 62mV will convert to

A

0.062 volts

28
Q

Volt meters are usually polarity sensitive

A

True

29
Q

Voltmeters are normally connected across the load (in parallel)

A

True

30
Q

A voltage drop reading is a measurement of the amount of voltage lost across the load

A

True

31
Q

A negative symbol on the display of a DVOM indicates the polarity has been reversed

A

True

32
Q

An ammeter is connected directly to the positive and negative of a batter. This will result in

A

A burned out fuse of meter

33
Q

An amp meter is always wired in _____ with the load

A

series

34
Q

Technician A states that the amp meter is wired in series with the load. Technician B states that the amount of current flowing in the circuit has no impact on the the meter. Who is correct?

A

Technician A only

35
Q

The input impedance of a DMM in the amperage position is

A

variable and based on the design of the DMM

36
Q

Amp meters should be connected into circuits that have resistive loads already in them

A

True

37
Q

A current probe will generate a voltage signal based on current flow

A

False

38
Q

A current probe is placed into a circuit that has been broken open

A

False

39
Q

A direct reading ammeter will usually be capable of reading small current flow

A

False

40
Q

An ohm meter is connected to a conductor and reads infinity. This indicates

A

the wire is open

41
Q

A digital reading of 2.370K ohms is

A

2370 ohms

42
Q

An ohm meter is placed on a load and reads OL. The meter is in the auto-range position. Technician A states that this means infinity. Technician B states that no current will be able to flow through the load. Who is correct?

A

Both Technician A and B

43
Q

767.4 M ohms is:

A

767,400,000 ohms

44
Q

Ohm meters are wired in series with the power and load

A

True

45
Q

0.42 k ohms is 420 ohms

A

True

46
Q

A wire that has low resistance will turn continuity tone on

A

True

47
Q

Adding additional resistance to a series circuit will

A

Reduce the current flow

48
Q

technician A states that the resistance in a series circuit is added together to find the total. Technician B states that the total resistance in a parallel circuit is always lower than the lowest single resistor. Who is correct?

A

Both Tech A and Tech B

49
Q

A 2-ohm resistor is wired in series with two 7-ohm resistors in parallel. The total resistance is

A

5.5 ohms

50
Q

To find the total current flow in any circuit

A

Divide the voltage by the resistance

51
Q

Three resistors, 2,3, and 4 ohm, are wired in series. Their combined resistance is

A

9.00 ohms

52
Q

How many amps will flow through the three resistances of previous question number 57 if you apply 12 volts to them?

A

1.3 amps

53
Q

Three 2- ohm resistors are wired in series. The total resistance is

A

6 ohms

54
Q

Technician A states that more work is accomplished with parallel circuitry. Technician B states that series resistance add up. Who is correct?

A

Both Technician A and Technician B

55
Q

The total wattage of two 2- ohm resistors wired in parallel is:? (assume the voltage is 12 volts)

A

144 watts

56
Q

If a circuit is said to be open, current will be flowing through it.

A

False

57
Q

A fusible link is a type of circuit protection

A

True

58
Q

In a parallel circuit, there is more than one path for current to follow

A

True

59
Q

The Voltage will divide among the resistances (loads) in a series circuit.

A

True

60
Q

What are the characteristics of a series circuit

A

The same current flows through each part of a series circuit. The total resistance of a series circuit is equal to the sum of individual resistances

61
Q

What are the characteristics of a parallel circuit

A

Has two or more paths current can flow through. Voltage is the same through each component. The sum of the currents through each path is equal to the total current that flows from the source.

62
Q

What are the characteristics of a series-parallel circuit?

A

Mech Tech (2 decks)

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