Test
CDC 2A652N - Volume 2 - Electrical and Electrical Circuits & Components
Preguntas del test (60)
1Every atom must contain what types of particles?
- AElectrons and protons
- BElectrons and neutrons
- CProtons and neutrons
- DElectrons, protons and neutrons
2An atom with 8 electrons in its outermost shell is said to be
- AFree
- BStable
- CValence
- DIonized
3How many valence electrons are needed to make a good conductor?
- A3
- B4
- C5
- D6
4"Dielectric" is the term used for
- AConductors
- BInsulators
- CDoped atoms
- DSemi-conductors
5The flow or drift of electrons through a conductor” in the same direction at the same time is the definition of
- AConductivity
- BVoltage
- CCurrent
- DValence
6The potential difference between two points in a circuit that exerts a force on free electrons is called
- AConductivity
- BVoltage
- CCurrent
- DValence
7What is used to control current flow in a circuit?
- AVoltage
- BCoulombs
- CResistance
- DConductivity
8The relationship of voltage, current and resistance is expressed through
- AE, I and C
- BPower formulas
- CConductance
- DOhm's Law
9Total current in a series circuit is equal to the
- ACurrent through one component
- BSum of the current through each component
- CReciprocal of the current through one component
- DReciprocal of the sum of the currents through each component
10What is the wattage of a circuit with 28 volts applied and a total resistance of .2 ohms?
- A.14 watts (w)
- B.14 kilowatts (kW)
- C3.92 W
- D3.92 kW
11In a parallel circuit, the total voltage is equal to the
- ASum of the voltages across each branch
- BVoltage across each resistor
- CVoltage across each branch
- DThe reciprocal of the voltage across the resistances
- ASum of the voltages across each branch
12Source current in a parallel circuit will be divided according to branch
- AVoltage
- BPowers
- CLengths
- DResistances
13The area around a magnet where its influence can be felt is the definition of the
- ASaturation principle
- BMagnetic theory
- CMagnetic field
- DLaw of attraction and repulsion
14“The ability of a material to pass lines of force” is a definition of
- APermeability
- BReluctance
- CElectromagnetism
- DRetentively
15The magnetism that remains after the magnetizing force has been removed is known as
- AElectromagnetism
- BMolecular magnetism
- CPermeability
- DResidual magnetism
16The magnetic field of an electromagnet can be varied by changing the
- AType of core
- BNumber of turns in the coil
- CAmount of current through the coil
- DAll of the above
17The electromechanical generation of a voltage requires a magnetic field, relative motion, and
- AA complete circuit
- BA conductor
- CAn insulator
- DA load
18The principle behind all electromechanical generation is
- AConduction
- BCommutation
- CRectification
- DElectromagnetic induction
19The function of the commutator in a DC generator is to
- AComplete the circuit to the load
- BInduce DC into the external circuit
- CRectify the input
- DChange AC voltage to DC voltage
20Because an inductor stores energy and then returns it to the circuit, it is called a
- AResistive device
- BReactive device
- CRetentive device
- DRetroactive device
21An inductor stores energy in the form of
- AHeat
- BResistance
- CA magnetic field
- DAn electrostatic field
22The process by which a current change in one coil produces a voltage in another coil is called
- AInductance
- BSelf-induction
- CMutual induction
- DNone of the above
23A transformer will change all of the following except
- APower
- BCurrent
- CVoltage
- DResistance
24Normally, the winding of a transformer that is connected to a power source is known as the
- AField winding
- BPrimary winding
- CCurrent winding
- DSecondary winding
25What kind of turns of wire is found in the secondary windings of a step up transformer?
- AEqual
- BLess
- CMore
- DAll of the above
26A relay is an electrically operated
- AMeter
- BMotor
- CSwitch
- DSafety device
27A relay that, once energized, requires a second coil to be energized before the contacts will return to their original positions is called a
- ALocking relay
- BLatching relay
- CTiming relay
- DTripping relay
28A capacitor stores energy in the form of
- AHeat
- BResistance
- CA magnetic field
- DAn electrostatic field
29In a capacitor, the dielectric is the
- APositive lead
- BConductor
- CInsulator
- DOuter case
30Opposition of a capacitor to AC is called
- AInductive reactance
- BImpedance
- CCapactive reactance
- DCapacitance
31The factors which determine the time required to charge a capacitor are the capacitance and the
- AApplied voltage
- BCircuit current
- CAmount of resistance
- DType of dielectric
32The anode of a diode is constructed of
- ANeutral material
- BBiased material
- CPositive material
- DNegative material
33Expanding or contracting the depletion region of a diode is called
- ABasing
- BGating
- CSpiking
- DBiasing
34A diode placed in a circuit in reverse bias is being used as
- AA spike protector
- BAn amplifier
- CA regulator
- DA rectifier
35A zener will conduct in reverse bias
- AFor a second or two at a time
- BUntil gate potential has been reached
- COnce the avalanche point has been reached
- DUntil the breakdown point has been reached
36A zener being used as a regulator must have a resistor placed in the circuit in
- ASeries
- BParallel
- CReverse bias
- DSeries-parallel
37What is the approximate operating voltage of a LED?
- A.5 volts
- B.1 volt
- C1.6 volts
- D2.4 volts
38The SCR has how many PN junctions?
- A1
- B2
- C3
- D4
39The amount of current required to gate an SCR is called
- AForward break over voltage
- BHolding current
- CPeak voltage
- DGate current
40In order for an SCR to be turned off
- AThe forward break over voltage must exceed the holding voltage.
- BThe current must drop below the holding current.
- CThe negative amp switch must activate.
- DThe negative volt switch must activate.
41The best method of troubleshooting is the
- ASystematic method
- BInstantaneous method
- CHit-and-miss method
- DTrial-and-error method
42Which troubleshooting step is done by knowing proper equipment operation?
- AAnalysis
- BRecognition
- CRepair and check
- DElimination and isolation
43During which troubleshooting step do you try to determine which system could cause the malfunction?
- AAnalysis
- BVerification
- CRecognition
- DElimination and isolation
44During which troubleshooting step do you first use the schematic diagram?
- ARecognition
- BVerification
- CAnalysis
- DIsolation
45Which troubleshooting aid is designed to aid you if you see an unfamiliar symbol?
- AZones
- BSchematic
- CWiring diagram
- DReference designation index
46Which troubleshooting aid is designed to aid you in finding components on a diagram?
- AZones
- BSchematic
- CWiring diagram
- DReference designation index
47When used in a series circuit to measure voltage, how is a multimeter connected in the circuit?
- AIn series
- BTo ground
- CIn parallel
- DIn series-parallel
48To set a value to the height of the oscilloscope grid markings, you adjust the
- AFocus
- BPitch control
- CVoltage selector
- DTime sweep selector
49To ensure accuracy of an oscilloscope when preparing for operation you should always,
- AZero the display
- BCenter the display
- CIdentify the cal point and adjust to zero
- DIdentify the cal point and calibrate the display
50When you are testing a transformer, an open coil reading on the 8025A multimeter will be indicated by
- AA beep
- BAn extending analog bar graph
- COL
- D0 ohms
51Which could be the indication from the 8025A multimeter when you are checking a serviceable capacitor?
- AA beep
- BAn extending analog bar graph
- COL
- D0 ohms
52How many junctions are checked to test the serviceability of a transistor?
- A1
- B2
- C3
- D4
53When checking a FET, you must check the diode junction and the continuity between the
- AGate and source
- BSource and drain
- CGate and substrate
- DSubstrate and drain
54How can you identify an electrostatic sensitive device?
- AThe package will have special coloring as specified in local directives.
- BThe package will have a special control number as specified in local directives.
- CIt will be marked with the MIL-STD–129 symbol or a caution marking.
- DIt will be marked with the MIL-SPC–235 symbol or a warning marking.
55A heat sink is used in soldering to
- APrevent heat from damaging the component being soldered
- BPrevent heat from damaging other components in the circuit
- CApply heat to the component being soldered
- DApply heat to other components in the circuit
56A pitted or worn soldering iron tip should be redressed with a flat, fine, single-cut file and should be
- ATinned
- BClean of solder
- CReplaced
- DChecked for length
57The first step in soldering a conductor is to
- AWick the wire
- BRemove the insulation
- CApply heat to the connection
- DApply solder to the connection
58When soldering flat perforated terminals, the conductor is connected to the terminal using
- A90 degree wrap
- B180 degree wrap
- C270 degree wrap
- D360 degree wrap
59A wire is inserted into a solder cup until the
- AWire touches the bottom
- BWire clears the top of the cup
- CInsulation touches the cup
- DWire protrudes from the weep hole
60The best method of repairing a lifted circuit track on a PCB is to
- ABond it
- BGlue it
- CReplace it with bare wire
- DReplace it with insulated wire
Información
- Descripción
- CDC 2A652N - Volume 2 - Electrical and Electrical Circuits & Components
- Autor
- nicilynn1981
- Idioma
- English
- Visitas
- 137
- Etiquetas
- Valoración
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