Title: PE Exam #2 MC
Course: 15/SP Power Electronics Theory (ELTR-2560-31) > Section: Assignments

Q: The main two uses for a transistor are as ....
- switch and amplifier
- rectifier, switch
- amplifier, rectifier
- switch, filter
A: switch and amplifier

Q: The current flow through the collector-emitter of a transistor is controlled by ____.
- the base-collector junction
- changing temperature of the transistor
- frequency of base current
- the amount of base current
A: the amount of base current

Q: Assuming a PNP transistor, what will the ohm meter read if the transistor is good?<br><div style="text-align:center"><img width="163" height="146" align="bottom" alt="mc003-1.jpg" src="ppg/examview/PE_Exam_-2_MC/00001_res/mc003-1.jpg" border="0"></div>
- 0 (continuity)
- OL (open)
- 20 ohms
- 100 ohms
A: 0 (continuity)

Q: The FET in MOSFET stands for ___.
- Foward Electrical Transistor
- Field Effect Transistor
- Faultless Electron Transistor
- Field Electron Transistor
A: Field Effect Transistor

Q: IGBT stands for ___.
- Integrated Gated Bipolar Transistor
- Insulation Graded Binary Transistor
- Impedance Gate Bipolar Transistor
- Insulated Gate Bipolar Transistor
A: Insulated Gate Bipolar Transistor

Q: IGBT’s combine properties of both the __ transistor and the ___ transistor.
- Bipolar, FET (MOS or J - FET)
- JFET, Diode
- MOSFET, JFET
- NPN, PNP
A: Bipolar, FET (MOS or J - FET)

Q: An ideal electronic switch, would have four qualities.  One of these qualities is infinite speed.  Which of the following is not a quality of a ideal switch.
- infinite resistance when off
- zero resistance when on
- power limiting negative resistance
- no input power required to operate
A: power limiting negative resistance

Q: A triac operates like two ______ connected in an anti-parrallel configuration.
- diodes
- SCRs
- MOSFETs
- diacs
A: SCRs

Q: The symbol represents a ________.     <img width="147" height="79" align="bottom" alt="mc009-1.jpg" src="ppg/examview/PE_Exam_-2_MC/00001_res/mc009-1.jpg" border="0">
- MOV
- Triac
- Diac
- UJT
A: Triac

Q: The symbol represents a ________.     <img width="109" height="52" align="bottom" alt="mc010-1.jpg" src="ppg/examview/PE_Exam_-2_MC/00001_res/mc010-1.jpg" border="0">
- MOV surge arrestor
- Triac
- Diac
- UJT
A: MOV surge arrestor

Q: An MOV is a _______.
- solid state switch
- basically a capacitor
- made mostly of metal
- all of these are true.
A: solid state switch

Q: Surge arrestors are usually connected ______.
- in series with the load
- line to ground
- line to line
- anti-parrallel
A: line to ground

Q: MOV stands for _____________.
- metal oxide varistor
- magnesium oxide variable-resistor
- maximum oscillator varistor
- minumum oscillation varistor
A: metal oxide varistor

Q: An SCR which is on will stay on (keep conducting electricity) until   _____.
- current drops below minimum holding
- the gate is pulsed
- the gate current is removed
- the device is forward biased
A: current drops below minimum holding

Q: The acronym SCR stands for ___.
- Sinewave Controling Rectifier
- Semiconductor Capcitive Resistor
- Semiconductor Controlled Rectifier
- Silicon Controlled Rectifier
A: Silicon Controlled Rectifier

Q: A solid state relay built to handle <b>AC</b> loads will use a ________ in the output circuit.
- DIAC
- TRIAC
- Transistor
- Magnetic Relay
A: TRIAC

Q: Solid state relays can operate much _____ than mechanical relays
- quieter
- faster
- longer (more operations)
- all of these are true.
A: all of these are true.

Q: A common use for a triac is in _______ circuits.
- battery charger
- radio amplifier
- rectifier
- light dimmer
A: light dimmer

Q: An SCR and common rectifier diode operate in the same manner except an SCR can______.
- conduct in reverse polarity
- invert the incomming waveform
- can be triggered on
- can be triggered on and off
A: can be triggered on

Q: A transducer converts form of ___________ to __________.
- light, current
- energy, another
- power, heat
- heat, voltage
A: energy, another

Q: A __________ is a device that senses a magnetic field.
- thermistor
- photovoltaic cell
- photoconductive cell
- hall effect
A: hall effect

Q: A thermocouple generates a small ________________.
- current
- change in resistance
- heat gradient
- voltage
A: voltage