Radio Elements 2,3,4 Reviewer

Radio Laws (Element II) 1. No Radio station in the amateur radio service shall be operated except and in accordance with a valid permit or license issued by the Answer: National Telecommunications Commission (NTC) 2. Amateur class "D" certificate holders are authorize to operate Answer: VHF radio station only (144 MHZ - 146 MHZ) 3. Amateur Class "D" licensee is authorized to operate HF/SSB radio stations. Answer: No 4. Amateur class "D" licensee is authorized to operate VHF/FM radio sets with a maximum power of Answer: 100 watts 5. Amateur class "C" licensee is authorized to operate HF stations with an output power not to exceed Answer: 100 watts on CW 6. Amateur class "B" licensee is authorized to operate HF fixed stations with an output power not to exceed.. Answer: 500 watts on CW 7. Amateur class "A" licensee is authorized to operate HF fixed stations with an output power not to exceed Answer: 1,000 watts on CW 8. The minimum age requirement for an applicant to qualify for an amateur examination is.. Answer: 12 years 9. An examinee in the code test for an amateur operator is considered passed if he/she has committed no error for a period of one (1) minute reception provided further that he/she has transcribed at least.. Answer: 2/3 of the text 10. To facilitate the reception of distress calls all transmission on 145.00 MHZ shall be kept to a minimum and shall not exceed.. Answer: one (1) minute 11. This channel is used only for emergency communications and general calling for radiotelephony. Answer: 145 MHZ + 25 KHZ 12. Before transmitting on the frequency 145.000 MHZ, a station should listen on this frequency for a reasonable period in order to Answer: make sure that no distress traffic is being sent.

13. The speed requirement for an examinee for Class "A" code test is Answer: 12 words per minute 14. The speed requirement for an examinee for Class "B" code test is Answer: 8 words per minute 15. The speed requirement for an examinee for Class "C" code test is Answer: 5 words per minute 16. The speed requirement for an examinee for Class "D" code test is Answer: None 17. A candidate for any class of amateur license is required to obtain an average of Answer: 70% 18. A holder of an ECE license or first class radiotelephone/radiotelegraph operator certificate is qualified to hold Answer: Class "B" amateur certificate/license 19.What instruments are required for the operation of an amateur station Answer: valid amateur operator certificate and amateur radio station license. 20. An amateur shall shall not transmit messages or signals containing Answer: profane or indecent words or language 21. All transmission in the amateur radio service shall carry identification signals known as Answer: call sign 22. Where should an amateur radio station licensed be posted? Answer: in a conspicuous place in the radio station 23. An amateurs authorized to receive, levy or collect toll fee or other remunerations for a service or services performed by his stations? Answer: No 24. Are commercial messages allowed to be transmitted by an amateur? Answer: No

25. The radio frequencies allocated for amateur stations shall be used strictly in accordance with Answer: the class of operating station

37. When should an amateur certificate be filed for renewal? Answer: 30 days before expiration date

26. What should an amateur do upon knowing that his station iscausing harmful interference to the operation of any existing station? Answer: cease operation immediately

38.What is the maximum penalty levied to an individual who violates the provisions of the radio control law? Answer: fine of P 2,000.00 and imprisonment of 2 years

27. Operation of portable stations must not extend beyond one (1) monthin any other area without obtaining Answer: specific authority for continued operation 28. If the operation of a portable station should exceed four (4) monthsin any other area, what must be applied for? Answer: modification of the station license 29. When shall a persons other than the licensed radio amateur allowedto use the latter radio transmitter /transceiver? Answer: when the operation is under the direct supervision or control of the licensee 30. The Philippines is divided into how many radio amateur districts? Answer: nine (9) 31. Who is authorized to install and operate amateur radio repeaters? Answer: Only duly recognized amateur associations, clubs or societies 32. An amateur association should have how many number of members to qualify for accreditation by the NTC? Answer: 25 33. The fixed amateur radio station of an association, club or society shall be licensed under the name of Answer: trustee designated by the association, club or society 34. One of the grounds for the revocation /suspension of a radio amateur license is Answer: violation of the provision of the radio control law 35. In case of loss of an amateur certificate of amateur radio station license, what should an amateur do? Answer: file an application for duplicate with the NTC 36.When should an amateur radio station license without modification be filed for renewal? Answer: 30 days before expiration date

39.What is the maximum penalty levied to a company that violates the provisions of the radio control law? Answer: fine of P 5,000.00 40. The content of a radio message shall be divulge only to the Answer: addressee 41. What is the amateur radio service? Answer: A radio communications service for self-training and technical investigation 42. What is an amateur radio operator? Answer: Someone who performs communications for self training and experimentation 43. What is an amateur radio station? Answer: A radio station operated by a person interested in self-training, intercommunications and technical investigations 44. Ordinarily an amateur station logbook must be kept for how long after the date of last entry? Answer: one year 45. An amateur radio station logbook with a distress traffic entry should be kept for a period of Answer: five years 46. An amateur radio station license should be located Answer: In the premises under the control of the licensee 47. When is music allowed to be broadcast over an amateur radio station? Answer: never 48. An amateur radio station is allowed to contact Answer: all amateur radio stations 49. Holders of class "D" certificates are allowed to operate UHF/FM radio stations Answer: No 50. Holder of class "C" amateur certificates may possess how many amateur radio stations? Answer: as many as they could

Element III 1. The instrument used to measure current is Answer: ammeter 2. The instrument used to measure voltage is Answer: voltmeter 3. The instrument used to measure resistance is Answer: ohmmeter 4. The output power of a transmitter is measured by united called Answer: Watts 5. Rubber is an example of Answer: Insulator 6. Copper is an example of Answer: Conductor 7. Silicon is an example of Answer: Semi-conductor 8. The quantity of 144.474 MHZ refers to Answer: frequency 9. The frequency 145.00 MHZ has an approximate wavelength of Answer: 2 meters 10. The frequency band 144 MHZ to 46 MHZ is within the Answer: VHF band 11. The terminal voltage of an ordinary flashlight battery is Answer: 1.5 volts 12. One thousand watts is sometimes written as Answer: 1 kilowatt 13. Sound waves are also called Answer: audio frequency waves 14. An open circuit has a resistance of Answer: Infinity 15. A short circuit has a resistance of Answer: Zero

16. When current passes through a path of lesser resistance thereby destroying the fuse in a circuit, we say that the circuit is Answer: Short Circuited 17. What is the radiotelephone distress signal? Answer: MAYDAY 18. What is the radiotelephone emergency signal? Answer: PAN 19. What is the unit of resistance? Answer: Ohm 20. What is the unit of inductance? Answer: Henry 21. What is the radiotelephone safety signal? Answer: SECURITE 22. One cycle of a wave is measured in Answer: Hertz 23. What is the unit of capacitance? Answer: FARAD 24. The prefix PICO means Answer: 10 -12 25. The prefix MEGA means Answer: 10 6 26. The opposition of a conductor to the flow of current is Answer: Resistance 27. The circuit element that opposes any change in current is Answer: Inductor 28. The circuit element that opposes any change in voltage is Answer: Capacitor 29. What is the unit of admittance? Answer: Siemens 30. What is to be provided in house entrance of circuit switches in order to be sure that radio or other equipment when short-circuited will not cause fire of electric origin Answer: Fuse

31. An instrument that measures frequency Answer: Frequency counter 32. An instrument used to measure resistance, voltage and currents Answer: Multimeter 33. Connecting a resistor in series with a meter will Answer: Increase the measuring range of a voltmeter 34. Connecting a resistor in parallel with a meter will Answer: Increase the measuring range of ammeter 35. Two identical resistors are connected in parallel. What is the resultant resistance? Answer: Half the value of one resistor

42. All antenna system and equipment should be grounded when the station is not in use in order to Answer: Protect the station and building from damage due to nearby lightning strike 43. What should you do to prevent shock when working on high voltage power supply? Answer: Discharge the filter capacitors 44. Give the name of an instrument that is useful for monitoring relative RF output during transmitter and antenna adjustment Answer: Grid-dip meter 45. Ohm's Law is stated in the following formula Answer: V = IR

36. Two identical capacitors are connected in parallel. What is the resultant capacitance? Answer: Twice the value of one capacitor

46. The power formula is Answer: P = I2R

37. Two identical capacitors are connected in series. What is the total capacitance? Answer: Half the value of one capacitor

47. To produce higher output voltage, dry cells should be connected in Answer: Series

38. In order to protect a personnel and prevent shock, the equipment should be connected good earth ground through the Answer: Cold water pipe

48. Two identical resistors are connected in series. What is the resultant resistance? Answer: Twice the value of one resistor

39. Audio frequency range is from Answer: 300 HZ to 30 KHZ 40. Storage batteries are usually rated in Answer: Ampere-hour 41. A good measure to prevent the use of the Amateur Radio Station equipment by unauthorized person is Answer: Use of key operated power switch

49. The larger the diameter of a copper wire Answer: The lower is the resistance of the wire 50. The longer the copper wire Answer: The higher is the resistance of the wire

Element IV 1. When the collector is common to both the input and the output of a transistor circuit the transistor is configured in Answer: common collector 2. The logarithm of the ratio of the output power over the input power is Answer: bell 3. The frequencies comprising the extrahigh frequency (EHF) Answer: 30 gHZ to 300 gHZ 4. What is the unit of conductance? Answer: siemens 5. To overcome the skin effect of radio waves electric wires use is antenna and coils are Answer: stranded

15. Why is it advisable to provide a radio transmitter with an on and off switch with lock and key? Answer: to prevent operation by unauthorized persons. 16. If the transmitter output is not matched with the antenna, what will be the effect aside from reduced power? Answer: radiation of harmonic frequencies 17. The opposition of a wire to the flow of electric current is Answer: resistance 18. The charge carried by an approximately 6.28 x 10 18 electrons or the practical unit of charge in the MKS system is Answer: coulomb 19. Spectrum analyzers are used to present test signals in Answer: frequency domain

6. An electrical circuit with a predominantly inductive reactance has a Answer: lagging power factor

20. The origin of an interfering station can be located with the used of a direction finder by Answer: triangulation

7. If the frequency is 150 mHz, what is the wavelenght? Answer: 2 meters

21. To generate pulsating dc voltage, what equipment is used? Answer: sweep generator 22. Storage batteries are usually rated in Answer: Ampere-hour

8. To effect maximum transfer of power from the final output stage of a transmitter to the antenna there must be Answer: good impedance matching 9. An electrical current which changes polarity periodically is called Answer: alternating current 10. Two amplifiers with a gain each of 10 db are cascaded. What is the total gain? Answer: 40 dB 11. The diameter of a copper wire is halved. Its resistance is Answer: increase four times

23. In order to effect a good impedance meter between the transmitter and antenna, what is used? Answer: antenna coupler 24. The interference brought by the resultant signal from addition and subtraction of the fundamental and harmonics of two or more signals is called Answer: intermodulation 25. A balun is used to Answer: connect a balanced line to an unbalanced line

12. The two-tone test is used in SSB transmitter to Answer: simulate speech signal

26. In order to be sure that the amateur radio station is operating within the authorized band limits, the amateur licensed must use Answer: frequency counter

13. What instrument is used to measure resistance with value less than one ohm? Answer: wheatstone bridge

27. Which of the following instrument maybe classified as a multi-meter? Answer: volt-ohmeter

14. An instrument which is designed to produce a range of frequencies in the RF and AF bands is known as Answer: signal generator

28. What is the unit of measure of impedance? Answer: ohms

29. What is the opposition to the flow of an alternating current in circuit containing both resistance and reactance called? Answer: impedance

42. A voltage of 110 Volts across a resistor causes a current of 5 Ampere to flow through the resistor. How much power is expended in the resistor? Answer: 550 Watts

30. How is the effect of reactance represented in formulas Answer: as the symbol X

43. Three resistors R1 = 30 ohms, R2 = 160 ohms and R3 = 40 ohms are connected in series across a generator. A voltmeter connected across R2 reads 80 Volts. What is the voltage of the generator? Answer: 115 Volts

31. In an electrical circuit, what is the opposition to the flow of direct current caused by inductance of capacitance. Answer: reactance 32. Describe the component part of a capacitor Answer: Parallel conductive plates by dielectric 33. Microfarad and picofarad are unit of Answer: capacitance 34. Give the decimal equivalence of a picofarad Answer: 0.000,000,000,001 F 35. The primary winding of a transformer has 2,000 turns and the secondary winding has has 500 turns. If the primary is connected to 220 volts AC, what is the secondary voltage Answer: 55 volts 36. What is the term for the phenomenon where most of a radio frequency current flows along the surface of the conductor Answer: Skin effect 37. What is the approximate magnitude of the impedance of a parallel RLC circuit at resonance Answer: Low 38. What is the approximate magnitude of the impedance of a parallel RLC circuit at resonance Answer: High 39. What is the characteristic of the current flow in a series RLC circuit at resonance Answer: It is minimum 40. A voltmeter connected across a resistance reads 22 V, and an ammeter connected in series with resistance reads 2.6 A. What is the value of the resistance? Answer: 84.6 ohms 41. How much current will flow through a resistance of 50 ohms if a potential of 220 Volts is applied across it? Answer: 4.40 ohms

44. No. 14 copper wire has a resistance of 2.58 ohms/1000 ft. What is the resistance of 1 mile of this wire? Answer: 13.6 ohms 45. A cell whose internal resistance is 0.15 ohms delivers 0.50 Ampere to a resistance of 2.85 ohms. What is the EMF of the cell? Answer: 1.5 Volts 46. Three cells, each with an EMF of 1.4 Volts and an internal resistance of 0.15 ohms, are connected in parallel, and a resistance of 1.35 ohms is connected across the group. How much current flows in the circuit? Answer: 1.0 Ampere 47. What is the capacitive reactance of 350 pF capacitor a t a frequency of 1200 kHz? Answer: 379 ohms 48. A series circuit consists of an inductance of 500 uH and a capacitor of 400 pF. What is the resonant frequency of the circuit? Answer: 356 kHz 49. What is the capacitance of a 6 uF capacitor in parallel with a capacitor 4 uF? Answer: 10 uF 50. A voltage standing wave ratio of an antenna is measured with Answer: an SWR meter