EXAM QUESTIONS AND
ANSWERS 2026 - 2027
In electronic devices, what term refers to residual magnetism? -
ANSWERS-Hysteresis
Some variable capacitors are made so that the plates interleave. The
capacitance varies as the plates open and close. As they open: -
ANSWERS-the capacitance decreases
In VOM's voltage multiplier resistors are important: - ANSWERS-in
the voltage scales
In a series tuned circuit, to increase the resonant frequency, you need
to: - ANSWERS-decrease the inductance
A MOSFET: - ANSWERS-amplifies signal voltage variations
Toroid cores are used in transformers for: - ANSWERS-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 _________. -
ANSWERS-AC variable frequency signal
,A variable capacitor depends on: - ANSWERS-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? - ANSWERS-The
SCR stays on
The combination of resistance and reactance which restricts the flow
of alternating current is called: - ANSWERS-Impedance
The output of a thermocouple would most likely be measured in: -
ANSWERS-millivolts
The Z axis on an oscilloscope is: - ANSWERS-intensity
When soldering transistor or IC chip legs, a _____________ should
be used to prevent overheating of the small discrete components. -
ANSWERS-heat sink clip
Which of the below would normally be used for the core of a
transformer? - ANSWERS-Ferrite
The "1" in binary number 100000 carries a weight of: - ANSWERS-
32
, You would choose an LCD if you needed: - ANSWERS-a low current
digital display
Germanium diodes: - ANSWERS-normally drop about .3 V with
forawrd current
RF signal propagation what is normally considered "line of sight"
would be: - ANSWERS-UHF
8.33 meters is the full wavelength in air for what RF frequency? -
ANSWERS-36 MHz
Decimal 164 would appear as ________ in binary? - ANSWERS-
10100100
A resistor has color stripes yellow, violet, violet, silver. It is: -
ANSWERS-470 MegOhm +/- 10%
what is the total capacitance of three capacitors valued at 100pf,
100pf, and 50pf when connected in a series? - ANSWERS-25 pf
what is the ripple frequency of a full wave single phase bridge
rectifier operated at 60Hz? - ANSWERS-120Hz
When heated or cooled, a ________emits a voltage. - ANSWERS-
theromcouple