CONSTRUCTION MODULE E

SIGNALLING AND COMMUNICATION SYSTEMS

QUIZ

Page 1 of 12

1. Convert the binary number 101101 to decimal?

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A. 24

B. 18

C. 45

D. 54

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2. Which binary number below represents decimal number 20?

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A. 011100

B. 010101

C. 111000

D. 010100

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3. A capacitor in a dc circuit acts as an?

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A. Short

B. Resonance circuit

C. Open

D. Shunt to ground

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4. The binary systems is known as a base 2 system.

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A. True

B. False

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5. What is the value and tolerance of the resistor below?

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A. 2500Ω, 20%

B. 250Ω, 5%

C. 250Ω, 10%

D. 25Ω, 1%

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Page 2 of 12

6. What is the network topology shown below?

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A. Ring

B. Star

C. Bus

D. None of the above

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7. TTL high signal operates at an ideal voltage of 5v.

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A. True

B. False

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8. You are installing a 7 segment display how many wires does this installation require?

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A. 7, 7 input wires

B. 10, 8 input wires and 2 grounds

C. 4, 4 input wires

D. 8, 7 input wires and 1 ground

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9. An opto-coupler/opto-isolator uses small copper wires to transfer signals.

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A. True

B. False

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10. When a communication cable enters a building by aerial drop at what point shall the metal sheath or shield be bonded to ground?

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A. At the electrical meter casing outside of the building

B. At the utilities junction box

C. Before entering the building

D. As close as practical to the point of entrance

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Page 3 of 12

11. What is the minimum separation between conductors of a communication system and any insulated conductor of an electric light or power system operating at more than 300v?

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A. 50mm

B. 150mm

C. 600mm

D. 300mm

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12. Conductors of fire alarm system with more than 7 strands must be bunch tinned or terminated in compression connectors.

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A. True

B. False

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13. Conductors of a fire alarm system shall be installed in metal raceways of the totally enclosed type.

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A. True

B. False

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14. Of the cables below which is acceptable to use on fire alarm systems?

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A. Flat aluminum bus bar 25mm thick

B. Teck 90

C. CAT 5

D. twisted pair bell wire

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15. The circuit breaker supplying a fire alarm system shall be identified as such and coloured red.

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A. True

B. False

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Page 4 of 12

16. The circuit breaker supplying a fire alarm system must be lockable in the on position.

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A. True

B. False

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17. How many pairs of wires are connected to a Fire alarm panel in a Class ‘A’ circuit?

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A. 1 pair

B. 3 pairs

C. 2 pairs

D. 5 pairs

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18. What is the purpose of an end of Line resistor in a fire alarm circuit?

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A. It limits the supervisory current and allows the panel to monitor the loop integrity

B. Used when terminating high voltage smoke detectors

C. Limits current to heat detectors

D. Adds resistance to the loop so the input devices can communicate with the fire alarm panel

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19. What is an example of an ancillary device with respect to fire alarm systems?

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A. Fire water line pressure switch

B. Manual pull station

C. Magnetic door locks

D. Fire water valve position switch

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20. Of the devices below which require electrical supervision from a fire alarm panel?

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A. Fire alarm speakers

B. Heat detectors

C. Duct smoke detectors

D. All of the above

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Page 5 of 12

21. CAN/ULC -S524 is the standard for what?

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A. Verification of fire alarm systems

B. Inspection and testing of fire alarm systems

C. Respond to a fire condition

D. Installation of fire alarm systems

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22. After a fire alarm system is installed it must be verified, what CAN/ULC standard would you use to accomplish this?

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A. CAN/ULC -S524

B. CAN/ULC -S536

C. CAN/ULC -S573

D. CAN/ULC -S537

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23. A fire alarm panel receives a signal from a smoke detector indicating a fire condition and in turn immediately transmits a fire alarm condition on its notification appliances, what type of system is this?

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A. Two stage system

B. Multi-stage system

C. Single stage system

D. Single two stage system

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24. In a Class B fire alarm system where should the End Of Line device be located?

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A. In the FAP in series with the positive conductor

B. Middle of the loop

C. Class B doesn’t need an EOL

D. After the last device on the loop and installed in its own box

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25. When connecting signalling devices to a fire alarm system what should be observed?

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A. Ensure proper polarity when connecting signal devices

B. Get approval from the authority having jurisdiction

C. Only connect signalling devices when FAP is shut down

D. Only connect 1 signalling device per loop

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Page 6 of 12

26. During the installation of fiber optic cables what precaution should be taken?

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A. No precautions are necessary, fiber optic cables are very robust

B. Avoid kinking the fiber optic cable

C. Only install fiber optics in temperatures under 10℃

D. None of the above

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27. After the installation of a coax cable in a network use a lan tester to test it.

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A. True

B. False

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28. What is the significance of the arrow on the symbol of a diode?

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A. There is no significance, it is just a symbol

B. Points to the power supply

C. Points to its gate terminal

D. Points to the cathode end of a diode

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29. Can conductive optical fiber cables be ran in the same conduit as class 2 circuits?

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A. Only if approved by a field visit of an electrical inspector

B. No, optical fiber cables shall be ran independently of any other circuits

C. It is permissible to run optical fiber cables with class 2 circuits

D. Yes but an extra ground conductor must be ran to reduce interference

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30. What is the minimum separation between exposed communication equipment and electrical light or power installations located in the same room?

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A. 900mm

B. 90m

C. 9mm

D. 250mm

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Page 7 of 12

31. What is the minimum separation that is to be maintained between community antenna distribution circuits on buildings and lightning conductors?

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A. 1m

B. 2m

C. 500cm

D. 100mm

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32. When testing a diode you find that no matter which way you place the leads of the multi-meter the diode it reads MΩ , what is the state of this diode?

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A. Shorted

B. Working properly

C. failed open

D. P type material was over doped

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33. You want details on how to connect a specific heat detector in a fire alarm loop, where would you look for this information?

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A. ULC 436

B. CEC section 32

C. Manufacturer’s instructions

D. NFPA 27

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34. In a two stage fire alarm system, typically how long will the first stage annunciate before sounding the fire alarm system notification appliances?

[Get Hints]

A. 3min

B. 4min

C. 2min

D. 5min

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35. Tip and ring are conductors in what type of communication cable?

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A. Coax cable

B. Cat 5 Cable

C. Single pair telephone cable

D. Optical fiber cable

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Page 8 of 12

36. If you want to connect a computer to a network with a CAT 5 cable, what type of connector would you install on the cable?

A. RJ-45

B. 555B

C. RS232

D. UHF crimp

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37. The input voltage to a full wave rectifier is 120vac/50hz, what is the output voltage and frequency of the rectifier?

[Get Hints]

A. 120v 60hz

B. 108v 100hz

C. 108v 120hz

D. 205v 120hz

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38. How many pairs of wires are connected to a manual pull station wired in class “A’ configuration?

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A. 4

B. 3

C. 2

D. 1

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39. What is the maximum rating of a circuit breaker for a 460v, 75HP, 3 phase fire pump installation?

[Get Hints]

A. 325

B. 225

C. 200

D. 300

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40. What is the purpose of a heat sink on an electronic component?

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A. Keep heat within the component

B. Correct voltage fluctuations due to cooling effect

C. Dissipates heat from the component

D. Provides a surface to measure temperature

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Page 9 of 12

41. What section of the code would you refer to if you are looking for specific rules associated with community antenna distribution?

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A. 12

B. 10

C. 60

D. 54

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42. Direct buried community antenna distribution conductors to be place under a driveway shall be placed at a minimum depth of 900mm

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A. True

B. False

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43. What system below is considered to be a life safety system?

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A. Fire alarm system

B. Cathodic protection

C. GFCI’s

D. Over current protection

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44. A conventional heat detector was subjected to water damage and the contacts of the heat detector have shorted out, what would be the result of this?

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A. An fire alarm condition would be sent to the FAP

B. Nothing, the FAP would recognize it is just water damage

C. A supervisory alarm would be activated

D. Trouble alarm would be activated

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45. You are asked to install fire devices around an industrial boiler, what device would be best suited for the area?

[Get Hints]

A. Rate of rise heat detector

B. Fixed heat detector

C. Duct smoke detector

D. smoke detector

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Page 10 of 12

46. Attenuation of an electrical communication signal is measured in decibels.

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A. True

B. False

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47. A fire alarm conductor is to be pulled into a raceway of the totally enclosed type, what is the smallest conductor you can pull into this raceway?

[Get Hints]

A. 22 awg

B. 16 awg

C. 18 awg

D. 12 awg

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48. To calculate inductors in a series, what formula would you use?

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A. Product/sum

B. L1 + L2 +L3…..

C. (1/(1/L1)+(1/L2)+(1/L3)…)

D. (L1x1.73) + (L2x1.73)+ (L3x1.73)

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49. A circuit used in a communication system has a 10h coil, 12h coil and a 22h coil connected in parallel, calculate the total inductance of the circuit?

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A. 4.37h

B. 3.37h

C. 44h

D. 44.37h

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50. What is referred to as static switching?

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A. it is the bounce that a mechanical switch experiences once closed

B. Uses static electricity to close a set of contacts

C. Switching of electrical circuits by devices that have no moving parts

D. Switching an electrical circuit that controls many static loads

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Page 11 of 12

51. Thermal compound or paste allows for better heat conduction and transfer between two parts.

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A. True

B. False

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52. Which of the following parameters below have an effect on the resistance of a conductor used in a communication system?

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A. Temperature

B. Diameter of conductor

C. Length of conductor

D. All of the above

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53. Why are wires in UTP cables twisted?

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A. Reduce crosstalk

B. To easily identify conductors

C. To cancel out electromagnetic interference

D. Both A and C

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54. When is it permissible to install conductors of fire alarm systems in a raceway, box or enclosure occupied by other electrical circuit conductors?

[Get Hints]

A. To connect the Fire alarm panel electrical supply

B. To connect an ancillary device

C. When it is convenient

D. Both A and B

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55. When installing a smoke alarm or carbon monoxide detector in a house it must be electrically supplied from which of the following below?

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A. The forced air furnace electrical supply

B. A Lighting circuit, or circuit containing a mix of lighting and receptacles

C. A separate circuit with no other devices on it

D. Must be connected to the electrical supply for the sump pump

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Page 12 of 12

56. A fire pump motor is supplied by an emergency power source, how do you calculate the ampacity of the conductors feeding the motor?

[Get Hints]

A. 130% x FLA

B. 200% x FLA

C. 125% x LRC

D. 125% x FLC

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57. A class “B” fire alarm circuit requires two end of line resistors in parallel after the last device on the loop?

[Get Hints]

A. True

B. False

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58. What is the function of Pins 2,3,7 on an RS232 connector?

[Get Hints]

A. Transmit, receive, signal ground

B. Transmit, buffer, receive

C. Receive, transmit, and process

D. Buffer, receive and multiply

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CONSTRUCTION MODULE E

SIGNALLING AND COMMUNICATION SYSTEMS

QUIZ

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