FREE COMMUNICATION SYSTEMS QUIZ

COMMUNICATION SYSTEMS

FREE QUIZ

Page 1 of 12

1. Convert the binary number 101101 to decimal?

[Get Hints]

A.24

B.18

C.45

D.54

2. Which binary number below represents decimal number 20?

[Get Hints]

A.011100

B.010101

C.111000

D.010100

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

[Get Hints]

A.Short

B.Resonance circuit

C.Open

D. Shunt to ground

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

[Get Hints]

A.True

B.False

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

[Get Hints]

A.2500Ω, 20%

B.250Ω, 5%

C.250Ω, 10%

D.25Ω, 1%

Page 2 of 12

6. What is the network topology shown below?

[Get Hints]

A.Ring

B.Star

C.Bus

D.None of the above

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

[Get Hints]

A.True

B.False

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

[Get Hints]

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

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

[Get Hints]

A.True

B.False

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

[Get Hints]

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

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?

[Get Hints]

A. 50mm

B.150mm

C.600mm

D.300mm

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

[Get Hints]

A.True

B.False

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

[Get Hints]

A.True

B.False

14. What cable below is acceptable to use on fire alarm systems?

[Get Hints]

A.Communication riser cable (CMR)

B.Teck 90

C.CAT 5

D.SOOW

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

[Get Hints]

A.True

B.False

Page 4 of 12

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

[Get Hints]

A.True

B.False

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

[Get Hints]

A.1 pair

B.3 pairs

C.2 pairs

D.5 pairs

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

[Get Hints]

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

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

[Get Hints]

A.Fire water line pressure switch

B.Manual pull station

C.Magnetic door locks

D.Fire water valve position switch

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

[Get Hints]

A.Fire alarm speakers

B.Heat detectors

C.Duct smoke detectors

D.All of the above

Page 5 of 12

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

[Get Hints]

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

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

[Get Hints]

A.CAN/ULC -S524

B.CAN/ULC -S536

C.CAN/ULC -S573

D.CAN/ULC -S537

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?

[Get Hints]

A.Two stage system

B.Multi-stage system

C.Single stage system

D.Single two stage system

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

[Get Hints]

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

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

[Get Hints]

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

Page 6 of 12

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

[Get Hints]

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

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

[Get Hints]

A.True

B.False

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

[Get Hints]

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

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

[Get Hints]

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

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

[Get Hints]

A.900mm

B.90m

C.9mm

D.250mm

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?

[Get Hints]

A.1m

B.2m

C.500cm

D.100mm

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?

[Get Hints]

A.Shorted

B.Working properly

C.failed open

D.P type material was over doped

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

[Get Hints]

A.ULC 436

B.CEC section 32

C.Manufacturer’s instructions

D.NFPA 27

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

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

[Get Hints]

A.Coax cable

B.Cat 5 Cable

C.Single pair telephone cable

D.Optical fiber cable

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

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

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

[Get Hints]

A.4

B.3

C.2

D.1

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

[Get Hints]

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

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

[Get Hints]

A.12

B.10

C.60

D.54

Page 9 of 12

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

[Get Hints]

A.True

B.False

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

[Get Hints]

A.Fire alarm system

B.Cathodic protection

C.GFCI's

D.Over current protection

43. 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?

[Get Hints]

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

44. 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

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

[Get Hints]

A.True

B.False

Page 10 of 12

46. 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?

A.22 awg

B.16 awg

C.18 awg

D.12 awg

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

[Get Hints]

A.Product/sum

B.L1 + L2 +L3…..

C.(1/(1/L1)+(1/L2)+(1/L3)...)

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

48. 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?

[Get Hints]

A.4.37h

B.3.37h

C.44h

D.44.37h

49. What is referred to as static switching?

[Get Hints]

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

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

[Get Hints]

A.True

B.False

Page 11 of 12

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

[Get Hints]

A.Temperature

B.Diameter of conductor

C. Length of conductor

D.All of the above

52. Why are wires in UTP cables twisted?

[Get Hints]

A.Reduce crosstalk

B.To easily identify conductors

C.To cancel out electromagnetic interference

D.Both A and C

53. 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

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

[Get Hints]

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

55. 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

Page 12 of 12

56. 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

57. 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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