CETA EXAM QUESTIONS AND
CORRECT SOLUTIONS
Toroid ✅✅ANSW-These type of transformer cores concentrate the lines of force
Autotransformer ✅✅ANSW-A single coil with unique winding and selective taps
Gas Diode ✅✅ANSW-Effectively become a short when ignition threshold of gas occurs between
the plate and cathode.
Klystrons ✅✅ANSW-Oscillate by themselves for a short period when cathode is pulsed.
Magnetron ✅✅ANSW-Operate in a frequency range higher than klystrons, and are capable of
much more power. Used by RADAR and microwave ovens.
Cathode Ray Tube ✅✅ANSW-Uses an electron gun to emit electrons in the direction of a
phosphor coated surface such as a TV screen.
Shottky Diode ✅✅ANSW-A metal/metal oxide diode. Performs very well at higher frequencies,
conducts high current and has lower losses than other diode types, Found in "switching" (DC-DC
converter) power supplies.
Laser Diode ✅✅ANSW-Emits a light when turned on. That light is a very small beam, is very
coherent and may be modulated. They are an inexpensive substitute for a true laser and are used in
many printers.
Tunnel Diode ✅✅ANSW-Using special "doping" techniques, these are very unique. Conduct at
different rates and different bias levels. Used in amplification, switching, oscillators, and other
special applications.
Metal Oxide Varistor (MOV) ✅✅ANSW-Special type of diode that is designed to conduct in either
direction when a certain reverse bias level is exceeded, and is able to dissipated an extreme amount
of energy. Totally destruct when their maximum energy level is reached, thus protecting circuits to
the maximum. Are not polarity sensitive and are the basis of the best surge suppressors.
, Varactor ✅✅ANSW-Semiconductor with capacitive qualities. Capacitance can vary as the applied
reverse bias voltage changes.
Diac ✅✅ANSW-Two zeners connected in reverse in parallel. Used in an AC environment to turn
on, or avalanche, when the design maximum bias is exceeded.
Triac ✅✅ANSW-Appears as two diodes of opposite polarity, parallel to each other and containing
a gate like the SCR. Gate might be activated by a digital electronic signal or a mechanical switch to
act as an ON/OFF switch.
Thermacouple ✅✅ANSW-Junction between two different metals that produces a voltage related
to a temperature difference. Widely used type of temperature sensor for measurement and control
and can also be used to convert heat into electric power. Output varies, but is most often less than
100 microvolts per degree of temperature change.
Balun ✅✅ANSW-Type of transformer that couples an unbalanced transmission line to a balanced
line.
SCR/Thyristor ✅✅ANSW-Four layers of N and P material. With gate positive, turns on and current
flow takes place. Can only be turned off by removing anode potential. used as high speed switches,
can rectify controlled amounts of AC power.
Direct, capacitor, transformer ✅✅ANSW-Three types of coupling used in cascading amplifiers
are:
0-0.6 Volts ✅✅ANSW-A TTL device is a logic zero when voltage is between:
2-5 Volts ✅✅ANSW-A TTL device is a logic one when voltage is between:
3.5-5 Volts ✅✅ANSW-A CMOS device is a logic one when voltage is between:
0-1.5 Volts ✅✅ANSW-A CMOS device is a logic zero when voltage is between:
CORRECT SOLUTIONS
Toroid ✅✅ANSW-These type of transformer cores concentrate the lines of force
Autotransformer ✅✅ANSW-A single coil with unique winding and selective taps
Gas Diode ✅✅ANSW-Effectively become a short when ignition threshold of gas occurs between
the plate and cathode.
Klystrons ✅✅ANSW-Oscillate by themselves for a short period when cathode is pulsed.
Magnetron ✅✅ANSW-Operate in a frequency range higher than klystrons, and are capable of
much more power. Used by RADAR and microwave ovens.
Cathode Ray Tube ✅✅ANSW-Uses an electron gun to emit electrons in the direction of a
phosphor coated surface such as a TV screen.
Shottky Diode ✅✅ANSW-A metal/metal oxide diode. Performs very well at higher frequencies,
conducts high current and has lower losses than other diode types, Found in "switching" (DC-DC
converter) power supplies.
Laser Diode ✅✅ANSW-Emits a light when turned on. That light is a very small beam, is very
coherent and may be modulated. They are an inexpensive substitute for a true laser and are used in
many printers.
Tunnel Diode ✅✅ANSW-Using special "doping" techniques, these are very unique. Conduct at
different rates and different bias levels. Used in amplification, switching, oscillators, and other
special applications.
Metal Oxide Varistor (MOV) ✅✅ANSW-Special type of diode that is designed to conduct in either
direction when a certain reverse bias level is exceeded, and is able to dissipated an extreme amount
of energy. Totally destruct when their maximum energy level is reached, thus protecting circuits to
the maximum. Are not polarity sensitive and are the basis of the best surge suppressors.
, Varactor ✅✅ANSW-Semiconductor with capacitive qualities. Capacitance can vary as the applied
reverse bias voltage changes.
Diac ✅✅ANSW-Two zeners connected in reverse in parallel. Used in an AC environment to turn
on, or avalanche, when the design maximum bias is exceeded.
Triac ✅✅ANSW-Appears as two diodes of opposite polarity, parallel to each other and containing
a gate like the SCR. Gate might be activated by a digital electronic signal or a mechanical switch to
act as an ON/OFF switch.
Thermacouple ✅✅ANSW-Junction between two different metals that produces a voltage related
to a temperature difference. Widely used type of temperature sensor for measurement and control
and can also be used to convert heat into electric power. Output varies, but is most often less than
100 microvolts per degree of temperature change.
Balun ✅✅ANSW-Type of transformer that couples an unbalanced transmission line to a balanced
line.
SCR/Thyristor ✅✅ANSW-Four layers of N and P material. With gate positive, turns on and current
flow takes place. Can only be turned off by removing anode potential. used as high speed switches,
can rectify controlled amounts of AC power.
Direct, capacitor, transformer ✅✅ANSW-Three types of coupling used in cascading amplifiers
are:
0-0.6 Volts ✅✅ANSW-A TTL device is a logic zero when voltage is between:
2-5 Volts ✅✅ANSW-A TTL device is a logic one when voltage is between:
3.5-5 Volts ✅✅ANSW-A CMOS device is a logic one when voltage is between:
0-1.5 Volts ✅✅ANSW-A CMOS device is a logic zero when voltage is between:
