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

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

#3 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?

#4 The resistance of an open circuit.

#5 No. 16 copper wire has a resistance of 0.85 ohms per 1 meter. What is the resistance of 2 kilometer of this wire?

#6 The power formula is

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

#8 Spectrum analyzers are used to present signals in the

#9 What is the symbol of Inductance?

#10 0.000001 Farad can also be written as

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

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

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

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

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

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

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

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

#19 What is the symbol of Reactance?

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

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

#22 What is the second harmonic of 1200 Hz?

#23 What is the power of transmitter with voltmeter reading of 1100 volts and 500 mA?

#24 Audio waves operate within the band.

#25 To stimulate speech signal, this test is used.