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Element 4

Disclaimer: We made a question pool available to the public to test their readiness to take the NTC Amateur Radio Exam. The question provided herein are taken from various review materials and are not the actual questions given by the NTC. These questions are only for review purposes. By answering these sample questions, you hereby agree to free CHARL from any accountabilities or liabilities resulting from the use or misuse of these materials. 73’s! 

Note: As per rules, the examinee must obtain an average of at least 70% of the 3 elements per class, with no score below 50% in any of the elements. We provided a 40-minute limit to answer each element to simulate actual exam conditions.


Class “C” (Technician Class), Element 4


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#1 What SWR among those mentioned shows the worst impedance match between transmission line and antenna?

#2 If the frequency is 400 Mhz, what is the wavelength?

#3 What is the test instrument used to measure resistance with value less than one ohm?

#4 What is the terminal voltage of an ordinary dry cell battery?

#5 The equipment is a simple audio amplifier with high impedance input used to “hear” a signal in a circuit.

#6 Spectrum analyzers are used to present signals in the

#7 The two-tone test is used in SSB transmitter to

#8 To effect maximum transfer of power from the final output stage of a transmitter to the antenna, there must be

#9 The location of an interfering station can be pinpointed by using direction finders and utilizing

#10 The opposition of a conductor to the flow of electric current.

#11 What is the second harmonic of 1200 Hz?

#12 Three cells, each with an EMF of 1.5 and an internal resistance of 0.3 ohms, are connected in series, and a resistance of 14.1 ohms is connected across the group. How much current flows in the circuit?

#13 Audio waves operate within the band.

#14 A current of 3 A flows through a resistor of 160 ohms. How much power is expended in the resistor?

#15 What is the symbol of Inductance?

#16 Two identical resistors valued at 1000 ohms are connected in series. They are further connected to a 220 V source. What current passes through the resistors?

#17 The quantity 144.474 MHz refers to the ___________ of a radio wave.

#18 Give the decimal equivalent of a microfarad

#19 Four identical capacitors rated at 40 uf are connected in series. Their total equiv. capacitance is

#20 The speed of light is

#21 Two identical inductors valued at 60 henrys are connected in series, the total equiv. inductance is

#22 If the operating frequency is 150 MHz, the wavelength is

#23 A frequency band where Audio Waves fall.

#24 The resistance of an open circuit.

#25 Ten times the logarithm of the ratio of the output power over the input power is