A track on a computer removable disk is:

a. one record
b. divided into sectors
c. created as data is written
d. one continuous path

b. divided into sectors

A PC has conventional RAM and ROM memory area (in a PC it is 0 to 640 kilobytes); Upper memory area (640 kb to 1 meg) and Extended memory area (above 1 megabyte). what other names for internal memory types do PCs have?

a. cache
b. tape drive
c. resistor array
d. expended

b. tape drive

Which video system has the highest resolution?

a. EGA
b. VGA
c. SVGA
d. XVGA

d. XVGA

You would want to use a dual trace oscilloscope to measure:

a. signal differences between two points
b. suspected resistance problems in one circuit
c. one faulty circuit in voltage level while another is faulty in the current level
d. one fault in video and the other in audio

a. signal differences between two points

Common Intermediate Frequencies (IF's) for AM and FM commercial broadcast receivers are:

a. 455 kHz and 1.2 GHz
b. 288 kHz and 455 kHz
c. 455 kHz and 10.7 MHz
d. 288 kHz and 10.7 MHz

c. 455 kHz and 10.7 MHz

Analog radio receiver signal compression:

a. uses D/A converters
b. reduces the high frequency received signal amplitude
c. changes AM to FM
d. primarily increases background noise level

b. reduces the high frequency received signal amplitude

Coaxial cable line losses at RF frequencies are due to:

a. wire resistance, capacitive and inductive reactance
b. wire resistance, dielectric fading and transconductance
c. capacitive and inductive reactance and braid leakage
d. magnetic effects of nearby materials

a. wire resistance, capacitive and inductive reactance

You are troubleshooting audio reproduction equipment and measure the signal to be input into the audio amplifier. What approx. RMS level would you expect that signal to be?

a. audio signals vary too much to be measured
b. 1 microvolt
c. 1 millivolt
d. 1,000 millivolts

d. 1,000 millivolts

The noise level in a radio receiver is generated mostly in the:

a. IF stages
b. local oscillator
c. audio section
d. RF section

d. RF section

The fast charging rate for a NiCad or Ni-MH battery should not exceed ___% of its AHr, or ampere per hour rating:

a. 5
b. 100
c. 25
d. 10

d. 10

Which one of the following in a PC would be part of disk operations?

a. serial port board
b. DMA ports
c. CGA ports
d. SATA or IDE controller

d. SATA or IDE controller

An LED:

a. only emits visible light when forward bias
b. can be used as a fiber optic signal source
c. does not need high current flow protection
d. may send or receive light signals

b. can be used as a fiber optic signal source

A dual-trace oscilloscope may have:

a. two electron guns
b. one frequency control
c. one set of position controls
d. a Z input for intensity modulation

d. a Z input for intensity modulation

The gain of an op-amp as an inverting amplifier is determined by the external ___.

a. supply voltage
b. + input DC voltage
c. series input resistor
d. feedback and input resistors

d. feedback and input resistors

Diodes are made from one type of material

a. true
b. false

b. false

Which propagation condition would be significant for a UHF signal to be received at a distance of 500 miles?

a. line-of-sight
b. faraday rotation
c. groundwave
d. tropospheric ducting

d. tropospheric ducting

Which of these would be considered a component of a "basic" power supply?

a. feedback circuit
b. IC regulator with short circuit protection
c. diode rectifier
d. circuit breaker box

c. diode rectifier

A "Voltage signal" is defined as:

a. modulated RF
b. baseband include sound information
c. baseband include visual information
d. broadband RF

c. baseband include visual information

You are servicing a power supply and have disconnected power. It has several 250 uF capacitors connected in parallel. To avoid shock, these capacitors:

a. should be disconnected
b. may be ignored
c. should be discharged to chassis ground, through a suitable resistor
d. should be isolated

c. should be discharged to chassis ground, through a suitable resistor

A schematic used in electronic servicing:

a. shows the size and shape of all components in the unit
b. is sometimes called a block diagram
c. shows the location and arrangement of components in the unit
d. is much like a road map for following signals

d. is much like a road map for following signals

High voltage should be discharged before servicing a product. After disabling AC input power, discharge an HV PS by:

a. shorting outputs to the plastic cabinet
b. disconnecting the HV lead with rubber gloves
c. draining through a large value resistor to chassis ground
d shorting output of the collector heat sinks

c. draining through a large value resistor to chassis ground

Which of these would be an important electrical consideration in the use of a transformer?

a. the operating frequency
b. space requirements
c. environmental temperatures
d. number of laminations

a. the operating frequency

If a 12v product is dissipating 50w, how much load resistance does the device represent?

a. .24 ohms
b. 24 ohms
c. 4.16 ohms
d. 2.9 ohms

d. 2.9 ohms

V²/P=R

12²/50=2.88

An "audio signal" is often defined as:

a. frequencies in 20 Hz to 15,000 Hz range
b. baseband include visual information
c. frequencies above ultrasonic
d. broadband RF

a. frequencies in 20 Hz to 15,000 Hz range

_____ will cause a generator to produce DC voltage rather than AC.

a. slip rings
b. load
c. armature loops
d. commutator

d. commutator

You suspect the unit has an internal short. To prevent further damage when you apply power, you should:

a. short around main fuse or breaker and proceed, watching for heat or arching
b. replace unit without attempting to repair it due to time and cost
c. measure resistance at dc connectors and compare to factory specs
d. insert low resistance high wattage (100 ohm, 10 W) resistor in series with power input

d. insert low resistance high wattage (100 ohm, 10 W) resistor in series with power input

A ripple counter:

a. is a meter that indicates power supply ripple frequency
b. is a network of many XNAND gates regulating the computer oscillator
c. is asynchronous counter that stores the counts of other counters in a computer
d. is two or more logical flip-flops connected sequentially with the inputs pulses toggling the first one

d. is two or more logical flip-flops connected sequentially with the inputs pulses toggling the first one

When a voltage is applied to a capacitor:

a. current is max at first, then reduces as capacitor charges
b. current is constant until full charged is reached
c. the voltage difference between the plates reduces as full charge is reached
d. there is no difference

a. current is max at first, then reduces as capacitor charges

An electrolytic capacitor in series between the power transformer and the rectifiers in a power supply:

a. protects diodes from power surges
b. eliminates the need for filter capacitors
c. is part of a voltage double circuit
d. provides that earth ground be isolated from DC ground

c. is part of a voltage double circuit

Information travels through optic fibers via the flow of:

a. protons
b. lumens
c. photons
d. electrons

c. photons

You would most likely prefer an analog VOM over a DMM for:

a. intermittent fluctuations
b. accuracy
c. convenience
d. safety

a. intermittent fluctuations

Which of these circuits would most likely use a Zener diode?

a. a receiver IF section
b. a television tuner
c. a power regulator
d. a bridge rectifier

c. a power regulator

A block in a digital diagram is called a NOR. Which is true?

a. it may also be called a NAND
b. it is a NOT OR or Inverted OR
c. it will pass any single negative signal but no more than one
d. it must be reset after any positive signals are applied

b. it is a NOT OR or Inverted OR

Which of these statements is most true of relating to schematic diagram of electronic devices?

a. they provide pictorial representations of components
b. they supply manufacturing specs of components
c. they represent signal paths
d. they provide user operational procedures

c. they represent signal paths

In personal computer technology, ROM indicates:

a. memory that my not be addressed randomly
b. memory that my only be read from
c. real address mode memory
d. resident operating system memory

b. memory that my only be read from

A light emitting diode will light when:

a. the gate is turn on
b. at avalanche
c. is forward bias
d. is reversed bias

c. is forward bias

A zener diode is rated 6.3 v. this tells you:

a. it conducts to limit the voltage across it to 6.3 v
b. requires 6.3 v gate voltage to turn on
c. generates 6.3 v if activated by light
d. it does not allow PS voltage to go below 6.3 v

a. it conducts to limit the voltage across it to 6.3 v

A TRIAC is frequently used to?

a. for high power generation
b. a power supply rectifier
c. for power surge protection
d. to electronically turn equipment on and off

d. to electronically turn equipment on and off

A technician must be knowledgeable about "EDS":

a. to be able to select proper soldering device
b. because voltage sensitive devices come in numerous sizes
c. in order that he will have the proper test equipment for them
d. because static discharge can destroy many components

d. because static discharge can destroy many components

In a motor, the counter-emf voltage induced in the armature ___ the source current.

a. add to
b. cause a decrease in
c. does not effect
d. is unaffected by

b. cause a decrease in

One significant difference between a TV antenna and a CB antenna is:

a. TV is much lower frequency, thus longer
b. TV is a narrow band, thus antenna length not critical
c. CB is FM and TV is AM
d. TV is polarized horizontal while CB is vertical

d. TV is polarized horizontal while CB is vertical

"Switching power supplies":

a. are sometimes called DC to DC converters
b. are normally remote controlled
c. don not convert incoming AC power to a higher frequency
d. must operate off AC sources only

a. are sometimes called DC to DC converters

Which of these would you likely find in a DC motor speed control circuit?

a. a klystron
b. an op-amp
c. an MOV
d. LCD's

b. an op-amp

A transformer on a schematic has two leads connected to primary and three to secondary, one on each end and one in middle. This is a/an:

a. audio transformer
b. IF transformer
c. center tapped secondary transformer
d. high voltage transformer

c. center tapped secondary transformer

The 9 pin DB9 connector serial port on a PC is commonly called the ______ standard.

a. centronics
b. RS232
c. DIN
d. USB

b. RS232

Three capacitors of 470 pf, 560 pf, and .47 pf are in parallel with each other. the total is:

a. .47 pf
b. 2.13 pf
c. 1030.47 pf
d. 1.03047 uf

c. 1030.47 pf

C1 + C2 + C3 = Ct

470 pf + 560 pf +.47 pf = 1030.47 pf

Ohm's law provides equations relating to:

a. Volts, amps, and resistance
b. amps, joules, and resistance
c. decibels, resistance, voltage
d. amps, resistance, joules

a. Volts, amps, and resistance

A power source such as a generator or battery might be compared to what component in a water supply system?

a. valve
b. pump
c. filter
d. pipeline

b. pump

Which of these is a good indicator of the quality of an analog meter?

a. lowest current scale
b. highest voltage scale
c. ohms-per-volt rating
d. number of resistance scales

c. ohms-per-volt rating

The vertical axis of an oscilloscope display is also called the:

a. X axis
b. time base
c. Y axis
d. output

c. Y axis

If you increase the value of an inductor, the inductive reactance will:

a. increase
b. decrease
c. stay

a. increase

Which would least likely be a high-voltage (above 1,000V) capacitor?

a. mica
b. ceramic
c. paper
d. electrolytic

d. electrolytic

The rechargeable cells currently used in many consumer portable products would be:

a. lead-acid
b. carbon-zinc
c. lithium
d. lithium-ion

d. lithium-ion

A solid-state regulator:

a. is made up of SCRs
b. varies conductance to maintain a level output voltage
c. is simply a zener diode
d. uses Diacs to sense the output voltage level and vary input voltage

b. varies conductance to maintain a level output voltage

A current-carrying conductor is placed in a magnetic field perpendicular to the lines of flux. It tends to move in ____ direction to the force of magnetic lines of flux, as determined by Flemings left-hand rule

a. perpendicular
b. parallel
c. opposite
d. same

a. perpendicular

The antenna used to compare the gain of other antennas is called a ___.

a. dipole
b. rhomic
c. conical disk cone
d. co-linear stacked

a. dipole

The component that effectively becomes a short when turned on, and is turned off by disconnecting the path from the anode to cathode is the:

a. silicon controlled rectifier
b. schottky diode
c. unijunction transistor
d. field effect transistor

a. silicon controlled rectifier

Which of these terms would you most expect to see when referring to types of resistors?

a. electrolytic
b. FET
c. metal film
d. henry

c. metal film

"Microwave" as used in radio electronics, refer to:

a. a kitchen appliance
b. 1 GHz - 100 GHz radio frequencies
c. a style of television
d. an oscilloscope display interpretation

b. 1 GHz - 100 GHz radio frequencies

A differential amplifier whose two input signals are equal, but 180 degrees out of phase, will have a/an _____ output signal

a. max
b. zero
c. indeterminable
d. one half

a. max

Which of these can be used to control the output level of a generator?

a. rheostat in armature winding
b. small DC voltage applied to field winding
c. negative feedback circuit connected to commutator
d. centrifugal switch

b. small DC voltage applied to field winding

Impedance (Z, in ohms) includes:

a. inductance and capacitance
b. henries, farads, and ohms
c. resistance, capacitive reactance and inductive reactance
d. joules, farads, henries

c. resistance, capacitive reactance and inductive reactance

The velocity factor in an RF transmission line is determined by:

a. line length
b. center conductor resistivitiy
c. dielectric material between center conductor and shield
d. how line is terminated

c. dielectric material between center conductor and shield

A fuse, marked 250v, 650ma can be used in circuits with an "open-fuse" supply voltage of:

a. 125 v
b. 650 v
c. 5000 v
d. 250 kv

a. 125 v

A thermistor:

a. increases resistance with higher voltage
b. decreases voltage output with heat
c. changes resistance with temperature
d. unaffected by heat or cold

c. changes resistance with temperature

When a transformer is designed, what most determines the output voltage from secondary?

a. ratio of primary to secondary turns
b. type of core material
c. power rating
d. secondary load

a. ratio of primary to secondary turns

Adding armature windings in parallel to a generator's existing windings:

a. increase voltage output
b. increase current output
c. improves voltage stability
d. increases output frequency

c. improves voltage stability

A 10 W signal is received at 5 W. This is ____ dB loss.

a. 3
b. 6
c. 1.5
d. 4.5

a. 3

It is desired to raise the power to a speaker from 15 W to 30 W. This is a:

a. 2 dB increase
b. 3 dB increase
c. 6 dB increase
d. 15 dB increase

b. 3 dB increase

Which of these IC or semiconductor devices normally requires the most careful handling to avoid damage by static electricity?

a. TTL
b. ECL
c. MOV
d. CMOS

d. CMOS

Which of these components most commonly compares to the output of a solar cell?

a. NiCad battery
b. light sensitive diode and capacitor
c. alternator
d. FET

a. NiCad battery

Three series inductors have values of 20 mH, 30 mH and 40 mH respectively. Total inductance is:

a. 90 mH
b. 13.33 mH
c. .075 mH
d. .011 mH

a. 90 mH

Phototransistors:

a. require visible light
b. requires LED's to operate
c. emit light when activated
d. sensitive to invisible light

d. sensitive to invisible light

To simplify the following of an electrical signal path through circuitry, you could:

a. draw a detailed schematic
b. remove complicated components
c. restrict troubleshooting to taking voltage measurements
d. use a block diagram

d. use a block diagram

AC power outlet strips with surge suppressors will include at least one

a. MOV
b. MOS
c. circuit breaker
d. zener diode

a. MOV

Connecting 3 capacitors of: .05 uf, 20 uf and 40 uf in series result in total capacitance of:

a. 60.05 uf
b. .0498 uf
c. 19.95 uf
d. 65 uf

b. .0498 uf

1/((1/C1)+(1/C2)+(1/C3))=Ct

1/((1/.05 uf)+(1/20 uf)+(40 uf))=.0498uf

You would use this formula (Lt = L1 + L2 + L3):

a. in a capacitive series circuit
b. to find total inductance in series circuit
c. for series-parallel inductive impedance
d. resistive parallel circuit

b. to find total inductance in series circuit

The fifth color band on a 5% resistor is yellow. This tells you:

a. it has an extremely high degree of accuracy
b. manufacturer
c. tolerance
d. recommended frequency range

c. tolerance

VHF and UHF antennas don't use waveguides as feed lines because:

a. they create grounding problem
b. their resistance to high frequency is too high
c. the characteristic impedance is too high
d. the large dimensions at these wavelengths makes other transmissions lines more practical

d. the large dimensions at these wavelengths makes other transmissions lines more practical

Three input NAND has two low inputs and one high input. The output is:

a. low

b. high

c. either high or low

d. neither high nor low

b. high

To trace a logic path, you might use:

a. logic probe
b. a DMM
c. A logic pulser
d. A pulse tracer

c. A logic pulser

Ordinary alpha/numeric information transmitted by a computer is converted to binary using:

a. decoder
b. crystal
c. multiplexor
d. encoder

d. encoder

In electronic devices, what term refers to residual magnetism?

a. hysteresis
b. flux
c. induction
d. kinetic energy

a. hysteresis

Some variable capacitors are made so that the plates interleave. The capacitance varies as the plates open (separate) and close. As they open:

a. capacitance increases
b. capacitance decreases
c. voltage rating increases
d. dielectric becomes more dense

b. capacitance decreases

In VOM's voltage multiplier resistors are important:

a. in voltage scales
b. in current scales
c. in resistance scales
d. to protect movement

a. in voltage scales

In a series tuned circuit, to increase the resonant frequency, you need to:

a. decrease the inductance
b. add resistance
c. increase the inductance
d. increase input signal level

a. decrease the inductance

A MOSFET:

a. can be called a zener
b. typically has low input impedance
c. retain data
d. amplifies signal voltage variations

d. amplifies signal voltage variations

Toroid cores are used in transformers for

a. concentrating the magnetic flux
b. stepping voltage up or down
c. shielding from external influences
d. reforming flux lines

a. concentrating the magnetic flux

A PLL or phase-locked-loop circuit, contains a VCO, or voltage-controlled-oscillator. The output of the VCO is a/an ____.

a. DC constant level
b. in phase clock signal
c. AC variable frequency signal
d. 60 Hertz pulses

c. AC variable frequency signal

A variable capacitor depends on:

a. applied voltages being variable
b. the plate separation being adjustable
c. pressure on the dielectric being adjustable
d. provisions for feedback

b. the plate separation being adjustable

While anode and cathode voltages are maintained, the gate level on an SCR drops below the trigger point. What happens?

a. SCR turns off
b. SCR turns on
c. SCR stays on
d. nothing

c. SCR stays on

The combination of resistance and reactance which restricts the flow of alternating current is called:

a. impedance
b. resistance
c. volt-amperes
d. power factor

a. impedance

The output of a thermocouple would most likely be measured in:

a. milliwatts
b. millivolts
c. volts
d. amps

b. millivolts

The Z axis on an oscilloscope is:

a. vertical
b. horizontal
c. depths
d. intensity

d. intensity

When soldering transistor or IC chip legs, a ____ should be used to prevent overheating of the small discrete components.

a. ground lead
b. flux shield
c. heat sink chip
d. length solder wick

c. heat sink chip

Which of the below would normally be used for the core of a transformer?

a. paper
b. ferrite
c. rosin
d. silver

b. ferrite

The "1" in binary number 100000 carries a weight of:

a. 32
b. 10000
c. 10
d. 16

a. 32

You would choose an LCD if you needed:

a. lithium/cadmium DC source
b. low current digital display
c. inductive coupling device
d. charge-coupled device

c. inductive coupling device

Germanium diodes:

a. are also called tunnel diodes
b. normally drop about .3 v with forward current
c. may be used as zener diodes
d. more commonly called varactors

b. normally drop about .3 v with forward current

RF signal propagation that is normally considered "line-of-sight", would be?

a. HF
b. MF
c. UHF
d. VLF

c. UHF