FCC GROL Element 8 WITH CORRECT
QUESTION AND ANSWERS 2025/2026
8-10A3 In the circuit shown in Fig. 8A6, which of the following is true?
A. With A and B high, Q1 is saturated and Q2 is off.
B. With either A or B low, Q1 is saturated and Q2 is off.
C. With A and B low, Q2 is on and Q4 is off.
D. With either A or B low, Q1 is off and Q2 is on. - correct answers B. With either A or B low, Q1
is saturated and Q2 is off.
8-10A5 The block diagram of a typical RADAR system microprocessor is shown in Fig. 8A2.
Choose the most correct statement regarding this system.
A. The ALU is used for address decoding.
B. General registers are used for arithmetic manipulations.
C. The control unit executes arithmetic manipulations.
D. Address pointers are contained in the general registers. - correct answers D. Address pointers
are contained in the general registers.
8-11B2 The purpose of the modulator is to:
A. Transmit the high voltage pulses to the antenna.
B. Provide high voltage pulses of the proper shape and width to the magnetron.
C. Adjust the pulse repetition rate.
D. Tune the Magnetron to the proper frequency. - correct answers B. Provide high voltage
pulses of the proper shape and width to the magnetron.
,8-11B4 The purpose of the Pulse Forming Network is to:
A. Act as a low pass filter.
B. Act as a high pass filter.
C. Produce a pulse of the correct width.
D. Regulate the pulse repetition rate. - correct answers C. Produce a pulse of the correct width.
8-11B5 The purpose of the Synchronizer is to:
A. Generate the modulating pulse to the magnetron.
B. Generate a timing signal that establishes the pulse repetition rate.
C. Insure that the TR tube conducts at the proper time.
D. Control the pulse width. - correct answers B. Generate a timing signal that establishes the
pulse repetition rate.
8-12B1 High voltage is applied to what element of the magnetron?
A. The waveguide.
B. The anode.
C. The plate cap.
D. The cathode. - correct answers D. The cathode.
8-12B3 What device is used as a transmitter in a marine RADAR system?
A. Magnetron.
B. Klystron.
C. Beam-powered pentode.
D. Thyratron. - correct answers A. Magnetron.
8-12B4 The magnetron is:
, A. A type of diode that requires an internal magnetic field.
B. A triode that requires an external magnetic field.
C. Used as the local oscillator in the RADAR unit.
D. A type of diode that requires an external magnetic field. - correct answers D. A type of diode
that requires an external magnetic field.
8-13B3 A shipboard RADAR uses a PFN driving a magnetron cathode through a step-up
transformer. This results in which type of modulation?
A. Frequency modulation.
B. Amplitude modulation.
C. Continuous Wave (CW) modulation.
D. Pulse modulation. - correct answers D. Pulse modulation.
8-14B4 The shape and duration of the high-voltage pulse delivered to the magnetron is
established by:
A. An RC network in the keyer stage.
B. The duration of the modulator input trigger.
C. An artificial delay line.
D. The time required to saturate the pulse transformer - correct answers C. An artificial delay
line.
8-15B4 A circulator provides what function in the RF section of a RADAR system?
A. It replaces the TR cell and functions as a duplexer.
B. It cools the magnetron by forcing a flow of circulating air.
C. It permits tests to be made to the thyristors while in use.
D. It transmits antenna position to the indicator during operation. - correct answers A. It
replaces the TR cell and functions as a duplexer.
QUESTION AND ANSWERS 2025/2026
8-10A3 In the circuit shown in Fig. 8A6, which of the following is true?
A. With A and B high, Q1 is saturated and Q2 is off.
B. With either A or B low, Q1 is saturated and Q2 is off.
C. With A and B low, Q2 is on and Q4 is off.
D. With either A or B low, Q1 is off and Q2 is on. - correct answers B. With either A or B low, Q1
is saturated and Q2 is off.
8-10A5 The block diagram of a typical RADAR system microprocessor is shown in Fig. 8A2.
Choose the most correct statement regarding this system.
A. The ALU is used for address decoding.
B. General registers are used for arithmetic manipulations.
C. The control unit executes arithmetic manipulations.
D. Address pointers are contained in the general registers. - correct answers D. Address pointers
are contained in the general registers.
8-11B2 The purpose of the modulator is to:
A. Transmit the high voltage pulses to the antenna.
B. Provide high voltage pulses of the proper shape and width to the magnetron.
C. Adjust the pulse repetition rate.
D. Tune the Magnetron to the proper frequency. - correct answers B. Provide high voltage
pulses of the proper shape and width to the magnetron.
,8-11B4 The purpose of the Pulse Forming Network is to:
A. Act as a low pass filter.
B. Act as a high pass filter.
C. Produce a pulse of the correct width.
D. Regulate the pulse repetition rate. - correct answers C. Produce a pulse of the correct width.
8-11B5 The purpose of the Synchronizer is to:
A. Generate the modulating pulse to the magnetron.
B. Generate a timing signal that establishes the pulse repetition rate.
C. Insure that the TR tube conducts at the proper time.
D. Control the pulse width. - correct answers B. Generate a timing signal that establishes the
pulse repetition rate.
8-12B1 High voltage is applied to what element of the magnetron?
A. The waveguide.
B. The anode.
C. The plate cap.
D. The cathode. - correct answers D. The cathode.
8-12B3 What device is used as a transmitter in a marine RADAR system?
A. Magnetron.
B. Klystron.
C. Beam-powered pentode.
D. Thyratron. - correct answers A. Magnetron.
8-12B4 The magnetron is:
, A. A type of diode that requires an internal magnetic field.
B. A triode that requires an external magnetic field.
C. Used as the local oscillator in the RADAR unit.
D. A type of diode that requires an external magnetic field. - correct answers D. A type of diode
that requires an external magnetic field.
8-13B3 A shipboard RADAR uses a PFN driving a magnetron cathode through a step-up
transformer. This results in which type of modulation?
A. Frequency modulation.
B. Amplitude modulation.
C. Continuous Wave (CW) modulation.
D. Pulse modulation. - correct answers D. Pulse modulation.
8-14B4 The shape and duration of the high-voltage pulse delivered to the magnetron is
established by:
A. An RC network in the keyer stage.
B. The duration of the modulator input trigger.
C. An artificial delay line.
D. The time required to saturate the pulse transformer - correct answers C. An artificial delay
line.
8-15B4 A circulator provides what function in the RF section of a RADAR system?
A. It replaces the TR cell and functions as a duplexer.
B. It cools the magnetron by forcing a flow of circulating air.
C. It permits tests to be made to the thyristors while in use.
D. It transmits antenna position to the indicator during operation. - correct answers A. It
replaces the TR cell and functions as a duplexer.
