Description : The arrow drawn through the component shown in the illustration means that the device's value _____________. EL-0015 A. is fixed and cannot be changed B. is variable between two limits C. has yet to be determined for the circuit application D. is not allowed to change during circuit operation
Last Answer : Answer: B
Description : RC time constant characteristics, as shown in the illustration, are important in _____________. EL-0086 A. bridge rectifiers for alternator excitation B. timing and pulse shaping circuits C. transistor power amplifier biasing D. motor controller overload protection
Description : The diagram shown in the illustration demonstrates one of the useful properties of an 'RC' time constant circuit. The useful characteristic of the circuit is that 'C' can be charged ________________. EL-0086 A. ... with a high 'R' value and discharged slowly at a low current with a low 'R' value
Last Answer : Answer: A
Description : If the values of 'C' and 'R' shown in the illustration were 1 microfarad and 100 kOhms respectively, at what listed time would 'C' be considered fully charged? EL-0086 A. 0.1 second B. 0.2 second C. 0.5 second D. 5 seconds
Last Answer : Answer: C
Description : If the values of 'C' and 'R' shown in the illustration were 1 microfarad and 100 kOhms, which of the listed time intervals would equal one 'time constant'? EL-0086 A. 0.1 second B. 0.2 second C. 0.5 second D. 5.0 seconds
Description : If the values of 'C' and 'R' shown in the illustration were 1 microfarad and 3 Megohms respectively, at what listed time would 'C' be considered fully charged? EL-0086 A. 0.33 second B. 3 seconds C. 6 seconds D. 15 seconds
Last Answer : Answer: D
Description : If the values of C and R shown in the illustration were 1-microfarad and 3- Megohms respectively, which of the listed intervals would equal one 'time constant'? EL-0086 A. 0.33 second B. 3 seconds C. 6 seconds D. 15 seconds
Description : The advantage(s) of the method of D.C. motor speed control shown in the illustration is/are ______________. EL-0101 A. elimination of armature starting resistor losses B. elimination of speed instability with variable loads C. the ease of reversing motor direction D. all of the above
Description : The wiring diagram for the motor starting circuit shown in the illustration indicates ______________. EL-0007 A. resistance starting B. reduced voltage starting C. low voltage protection D. low voltage release
Description : As shown in the illustration, what is the meaning of the numbers in brackets [ ] at location '31/33U'? EL-0100 A. Four separate devices with these part numbers feed signals into this point. ... continues on those four pages and connects to devices at the indicated coordinates. D. None of the above.
Description : What power would be consumed by the series resistor of the circuit shown in the illustration if the source is 30 volts, the resistance of R1 is 10 ohms, R2 is 10 ohms, and R3 is 10 ohms? EL-0032 A. 5 watts B. 10 watts C. 20 watts D. 40 watts
Description : The electrical schematic shown in the illustration indicates the lighting feeder circuit is _____________. EL-0014 A. three phase, 450 volt, and 60 cycle B. three phase, 120 volt, and 60 cycle C. single phase, 120 volt, and 60 cycle D. not specified
Description : The 'E/P converter' shown in the illustration receives a _____________. EL-0096 A. steady pressure signal and produces a programmed electrical output B. variable electrical signal ... an inverse temperature correction D. variable pressure signal and produces a corresponding electrical output
Description : Which of the listed electrical devices is represented by the symbol shown in the illustration? EL-0055 A. Fixed resistance resistor B. Coil with magnetic core C. DC motor or generator shunt field D. Transformer
Description : What would be the voltage drop across the series resistor of the circuit shown in the illustration if the source is 30 volts, the resistance of R1 is 10 ohms, R2 is 10 ohms and R3 is 10 ohms? EL-0032 A. 5 volts B. 10 volts C. 20 volts D. 30 volts
Description : In the illustration, the component VR2 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to terminal ... 2 at 9.1 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the component VR1 on the A1 AMPLIFIER MODULE is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply from common B. a variable resistor diode to control the output to ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : In the illustration, the component VR1 on the A1A1 PCB is _________. EL-0060 A. a zener diode to regulate the +9 volt power supply B. a variable resistor diode to control the output to terminal 9 that controls ... terminal 9 at 6.6 volts DC D. a tunnel diode with a breakdown voltage of 6.6 Volts DC
Description : An adjustable resistor, whose resistance can be changed without opening the circuit in which it is connected, is called a _____________. A. bleeder resistor B. rheostat C. bridge D. variable shunt strip
Description : What do the arrow-like symbols at coordinate '33J' shown in the illustration represent? EL-0099 A. Connection to ground. B. Connection to the analog common bus. C. Plug-in connection. D. Screw connection on a terminal board.
Description : What is the direction of current through the load resistor in the circuit shown in the illustration? EL-0085 A. Always from point 'Z' to the grounded end. B. Always from the grounded end to ... on the instantaneous polarity at point 'W'. D. It cannot be determined without a directional ammeter.
Description : As shown in the illustration, the direction of electron flow through the component is _______. EL-0079 A. from terminal 'B' to terminal 'A' B. from terminal 'A' to terminal 'B' C. determined by the polarity of the applied voltage D. opposite from that in a resistor
Description : The winch shown in the illustration will not operate in any speed in the lowering direction and at an abnormal speed in 'first point hoist'. The possible cause is that _______________. EL-0102 A. ... '1M' in the power circuit are badly corroded D. master switch contacts 'MS6' have weak springs
Description : Moving the rheostat handle shown in the illustration, that is used to control a DC generator, towards the 'raise' direction will increase the _____________. EL-0030 A. field resistance B. armature resistance C. armature speed D. line voltage
Description : The electrical diagram shown in the illustration shows _____________. EL-0021 A. 'R1', 'R2', and 'R3' are connected is series B. 'R1', 'R2', and 'R3' are connected in parallel C. the voltages measured across ... if 'R1', 'R2' and 'R3' have different values D. the total resistance equals R1 + R2 + R3
Description : Power necessary to operate the horn shown in the illustration _____________. EL-0093 A. comes from each station's magneto B. is supplied from a 115 volt source C. is conducted through a relay coil D. also lights lamps 'R' and 'T'
Description : What is represented by the electric symbol figure 'D' in the illustration? EL-0005 A. Fuse B. Plug-in contact resistor C. Variable capacitor D. Electrolytic capacitor
Description : The electrical diagram shown in the illustration represents a ___________. EL-0054 A. series-wound motor B. shunt-wound motor C. compound-wound motor D. flat-compounded motor
Description : The electrical supply applied to the anodes shown in the illustration is _____________. EL-0090 A. low voltage, high current DC B. low voltage, high current AC C. high voltage, low current DC D. high voltage, low current AC
Description : Since the characteristics of the device shown in figure 'A' of the illustration includes a stable voltage and low current while operating, it can be suitably used in _____________. EL-0065 A. oscillators ... . class A and B amplifiers C. generator rectifier and filtering supplies D. all of the above
Description : The electrical schematic shown in the illustration represents a/an ____________. EL-0017 A. across-the-line starter B. primary-resistor starter C. autotransformer starter D. part-winding starter
Description : Which component is responsible for energizing solenoid 'B1-B2' and releasing the brake for the winch motor shown in the illustration? EL-0102 A. Contactor '3M' B. A spring not shown in the schematic diagram C. Resistor 'B2-R1' D. Relay 'FR-B.O.'
Description : The purpose of resistor bank 'R1-R5' in the winch circuit shown in the illustration is to ______________. EL-0102 A. limit armature current in lower and 'series field' current in hoist to ... required speeds D. regulate the strength of the brake solenoid 'B1-B2' in both directions of operation
Description : The direction of rotation of the winch shown in the illustration is changed by reversing the _____________. EL-0102 A. direction of current through the shunt field B. polarity of voltage at 'S1' and 'S2' C. direction of current through the armature D. polarity of voltage at 'L1' and 'L2'
Description : When three-phase AC power is supplied to the device shown in the illustration, the output will be _____________. EL-0063 A. single-phase AC B. split-phase AC C. three-phase DC D. unidirectional DC
Description : The heaters for the winch circuit shown in the illustration are powered from _____________. EL-0102 A. a separate source B. the winch main bus C. the master switch power circuit D. the contactor control circuit
Description : Which of the diagrams shown in the illustration, indicates the highest induced voltage? EL-0028 A. Diagram 'A' only B. Diagram 'B' only C. Both diagrams 'A' and 'C' D. Both diagrams 'B' and 'D'
Description : When using the test set-up shown in the illustration, the lighted lamp indicates the winding is ____________. EL-0027 A. grounded B. good C. open D. shorted
Description : The horizontal line which cuts across 'L1' shown in figure 'A' of the illustration indicates a/an ______________. EL-0091 A. iron core B. saturable core C. air gap D. capacitive coupling
Description : If you obtain a low resistance reading with a megohmmeter connected between terminals 'A' and 'C' of the three-phase, wye-connected winding shown in the illustration, there is __________. EL-0074 A. no open circuit ... 'B' C. an open circuit between 'A' and 'C' D. an open circuit in both windings
Description : As shown in the illustration, 'H1' and 'H2' are ___________. EL-0058 A. fixed capacitors B. variable capacitors C. contacts, closed when the circuit is energized D. contacts, open when the circuit is energized
Description : The graph shown in the illustration represents the speed droop curves of two equal capacity alternators about to be paralleled. When paralleled, the greater portion of the total load above 60% for each unit will be picked up ... unit 'A' B. by unit 'B' C. equally by each unit D. none of the above
Description : As shown in the illustration, part 'X' of the diagram is known as a/an _____________. EL-0052 A. commutator B. interpole C. starting pole D. auxiliary pole
Description : As shown in the illustration, the purpose of the item labeled 'Z', in assembly No. 2, is to _____________. EL-0001 A. keep the rotor in balance B. align the rotor to the stator C. dynamically balance the rotor D. cool the motor
Description : In order to determine whether or not 'fuse 2' shown in the illustration is defective, you should connect the voltage tester leads across points _____________. EL-0062 A. AC B. AD C. BC D. BD
Description : In order to determine whether or not 'Fuse 1', shown in the illustration is defective, you should connect the voltage tester leads across points _____________. EL-0062 A. AC B. AD C. BC D. BD
Description : The diagram shown in the illustration represents a/an _____________. EL-0082 A. stepup transformer B. magnetic amplifier C. autotransformer D. Scott-connected transformer
Description : Sound powered telephone units 'I', 'II', and 'III' of the circuit shown in the illustration are for 'station numbers' _____________. EL-0093 A. 2, 4 and 6 B. 1, 2 and 3 C. 3, 5 and 8 D. 1, 2 and 6
Description : When reassembling the equipment shown in the illustration, _____________. El-0001 A. item 2A and 2B should not be installed on assembly #2 until assembly #3 or #4 have been secured to assembly ... be secured to assembly #1 to provide support to assembly #2 during the reassembling of the entire unit
Description : The purpose of the item labeled 'Z' in assembly No. 2, shown in the illustration is to _____________. EL-0001 A. keep the rotor in balance B. align the rotor to the stator C. dynamically balance the rotor D. cool the motor