CET Practice Exam A questions well
answered
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.
answered
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.
