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CET Practice Exam A questions well answered
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CET Practice Exam A questions well answered
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CET Practice Exam A questions wellanswered
8.33 meters is the full wavelength in air for what RF frequency?
A. 72 MHz
B. 83.3 MHz
C. 36 MHz
D. 16.66 MHz - correct answer ✔✔C. 36 MHz
Decimal 164 would appear as _____in binary?
A. 10010101
B. 10100100
C. 10001111
D. 01110100 - correct answer ✔✔B. 10100100
A resistor has color stripes yellow, violet, violet, silver. It is:
A. 46 MegOhm +/- 10%.
B. 470 MegOhm +/- 10%.
C. 37 MegOhm +/- 10%.
D. 48 kOhm +/- 5%. - correct answer ✔✔B. 470 MegOhm +/- 10%.
What is the total capacitance of three capacitors valued at 100μf, 100μf and 50μf when connected in a
series?
A. 25 μf
B. 250 μf
C. 25 pf
D. 250 pf - correct answer ✔✔C. 25 pf
,What is the ripple frequency of a full-wave single phase bridge rectifier operated at 60Hz?
A. 180 Hz
B. 90 Hz
C. 360 Hz
D. 120 Hz - correct answer ✔✔D. 120 Hz
When heated or cooled, a _____ emits a voltage.
A. thermocouple
B. thermometer
C. thermostat
D. thermocline - correct answer ✔✔A. thermocouple.
Which wire size is physically largest?
A. #8
B. #12
C. #16
D. #24 - correct answer ✔✔A. #8
Adding the binary numbers 101011 and 001110 will give you what result?
A. 111001
B. 111111
C. 001010
D. 111011 - correct answer ✔✔A. 111001
A component that reduces in resistance as it is heated:
A. is a negative temperature coefficient thermistor.
B. is a positive temperature coefficient thermistor.
C. is a varactor.
D. is a thermocouple. - correct answer ✔✔A. is a negative temperature coefficient thermistor.
, An autotransformer:
A. has the secondary unattached to the primary.
B. has a single winding.
C. uses a core winding.
D. uses a buck-boost coil. - correct answer ✔✔B. has a single winding.
A dual trace oscilloscope differs from a single trace in that only the dual trace scope:
A. has two cathode ray guns.
B. has a Z input.
C. alternates sweeps.
D. has intensified traces. - correct answer ✔✔C. alternates sweeps.
If an RF signal voltage is reduced by 6 dB, it is then:
A. 25% less.
B. half the original size.
C. 75% less.
D. not changed in voltage level. - correct answer ✔✔B. half the original size.
Applying positive voltage to the P end and negative to the N end of a germanium diode:
A. will forward bias it.
B. will reverse bias it.
C. probably will damage it.
D. should have no effect on it. - correct answer ✔✔A. will forward bias it.
You would probably prefer a digital VOM over an ordinary analog meter:
A. for most accuracy.
B. to insure operator safety.
C. for convenience.
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