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

#2 Frequency of operations when the wavelength of the radio signal is one meter long.

#3 Yellow, Orange, Brown

#4 If the transmitter output is not matched with the antenna, what must be the effect aside from reduced power?

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

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

#7 An instrument which is designed to produce a range of frequencies in the AF and RF bands in known as

#8 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?

#9 An electrical circuit with equal reactances is said to be

#10 Give the decimal equivalent of a microfarad

#11 What is the second harmonic of 1200 Hz?

#12 The extent of reflection of radio waves in a transmission line can be measured with a

#13 Spectrum analyzers are used to present signals in the

#14 The power formula is

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

#16 The resistance of an open circuit.

#17 If two resistors valued at 20 ohms and 30 ohms, respectively, are connected in parallel, the total equivalent resistance is

#18 In order to be sure that the amateur radio station is operating within the authorized band limits, the licensed amateur must use

#19 The circuit element that opposes any change in voltage.

#20 Brown, Yellow, Red

#21 What is the capacitance of a 12 uF capacitor in parallel with a 6 uF capacitor?

#22 What is the symbol of Inductance?

#23 The frequency band used for shortwave radio broadcast is on

#24 The radiation intensity of an antenna is measured with

#25 Hams must regularly tune their transceivers. This must be done using ____ to ensure no interference to other users of the band.