Test
Mod 4
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Preguntas del test (35)
1A diode which emits photons when conducting is a
- Azener
- Blight emitting
- Cvaractor
2A junction diode
- Acan handle only very small currents
- Bis similar to a vacuum diode but cannot rectify
- Chas one p-n junction
3What diode gives off light photons when forward biased
- AShottky diode
- BGunn diode
- CLED
4When testing the forward bias of a diode with a mulitmeter
- Athe positive lead of the ohmmeter is placed on the anode
- Bit does not matter which terminal the postive lead
- Cthe positive lead of the ohmmeter is placed on the cathode
5A traic is a type of
- Atransistor
- Bthyristor
- Cthermistor
6what gives the color of an LED
- Athe active element
- Bthe type of gas used inside it
- Cthe plastic is encased in
7the electrodes of a silicon controlled rectifer (SCR) are
- Aanode, cathode ,source
- Bgate< cathode, anode
- Csource, drain, gate
8"P' Type materials are
- Adonors
- Bconductors
- Cacceptors
9A bi-directional TRIAC has two silicon controlled rectifier(SCR)s connected in
- Ainverse parallel
- Bseries parallel
- Cparallel series
10A germanium diode...
- Ahas a higher forward bias voltage than a silicon diode
- Bhas the same forward bias voltage as a silicon diode
- Chas a lower forward bias voltage than a silicon diode
11A Zener diode is used across the output for a power supply circuit to...
- Agive a full wave rectification
- Bprevent thermal runway
- Cprovide a steady DC voltage output without falling
12What is an intrinsic material?
- AA pure material
- BOne with removed elements
- COne with added elements
13A FET when compared to a junction transistor is
- Alow impedance
- Bhigh impedance
- Ccurrent operated
14A transistor at saturation has...
- Ahigh resistance
- Blow resistance
- Czero resistance
15How do you increase voltage gain of an amplifier?
- Adecrease base circuit bias
- Bdecrease input resistance
- Cincrease input resistance
16How is a push-pull transistor arrangement connected?
- Aemitter to emitter
- Bbase to base
- Ccollector to collector
17In a Common Emitter Amplifier RE (Emitter Resistor) is used for...
- Astabilisation
- Bload control
- Cbiasingg
18In an electronic circuit with an operational amplifier connected in the push-pull configuration, the circuit...
- Ablocks half of the input signal
- Bdecreases impedance
- Cutilizes both sides of the input signal
19The common collector amplifier is sometimes called the emitter follower circuit because...
- Athe emitter voltage follows the base voltage
- Bthe emitter voltage follows the collector voltage
- Cthe emitter current follows the collector current
20The emitter, base and collector currents follow ohm's and Kirchhoff's law which is...
- AIe = Ic - Ib
- BIe = Ib + Ic
- CIb = Ie + Ic
21A capacitor resistor coupled multistage amp lets...
- AAC pass only
- BDC pass only
- CAC and DC pass to the next stage
22What is the behaviour of an Op-amp when is acting as a Simple Voltage Comparator?
- AIt responds only to changes of input voltage
- BAct as a buffer amplifier
- CAs a two-state digital device with output voltage switching from high to low
23The input resistance to an inverting op-amp is 100 Ohms. The feedback resistance is 100 kilohms. What is the amplifier gain?
- A1/1000
- B1000
- C-1000
24The negative feedback for an integrator is connected across a...
- Ainductor
- Bcapacitor
- Cresistor
25Which mathematical operation is performed by a modulator amplifier?
- ASubtraction
- BAddition
- CMultiplication
26On a PCB, a decoupling capacitor is used to get rid of transient currents between which points?
- AInterspaced along the circuit
- BThe negative rail and the rest of the circuit
- CThe electronic circuit and the aircraft ground
27What are the basic criteria defining the PCB thickness board?
- AThe required strength and stiffness
- BThe required number of conducting paths
- CThe complexity of patterns and conducting paths
28A resolver synchro output is obtained from a rotor with...
- Athree coils at 120 to each other
- Bone single coil
- Ctwo coils at 90o to each other
29A two phase induction motor used in a servomechanism...
- Awill always require a starter
- Bis self starting under light loads
- Cruns with no slip
30An increase in amplitude of a rate feedback signal will cause...
- Ainstable operation
- Bsluggish servo operation
- Creduced hunting
31The result of reversing the rotor connections to the receiver of a torque synchro system is that the rotor position...
- Ais changed by 180
- Bis changed by 120
- Cis unchanged
32Digital signals vary...
- Ain discrete steps
- Bcontinuously between set levels
- Cslowly from one level to another level
33The rotor of a torque synchro indicator is...
- Ashort circuited
- Bconnected in series with the transmitter stator coil
- Csupplied with an excitation voltage
34In a Desynn indicator system, where is power supplied to?
- ATransmitter and indicator
- BTransmitter only
- CIndicator only
35The reference voltage in a differential transformer is applied to the winding(s) on...
- Aone of the outer limbs of the E-lamination
- Bthe center limb of the E-lamination
- Call three limbs of the E-laminations
Información
- Descripción
- Test sobre Mod 4, creado por Matty alfalasi el 03/02/2019.
- Autor
- Matty alfalasi
- Idioma
- English
- Visitas
- 64
- Valoración
- Aún sin valoraciones Valora este test