CONSTRUCTION ELECTRICIAN FREE QUIZ - Electrical Exams

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CONSTRUCTION ELECTRICIAN 309A

FREE QUIZ

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Page 1 of 10

1. What is the purpose of the occupational health and safety act (OHSA)?

A.Train employees on their specific job tasks

B.Protect workers from health and safety hazards on the job

C.To provide workers the opportunity to increase their hourly wage

D. Protect homeowners doing work on their own premises

2. The identified conductor of a single phase ac circuit is what colour?

A. Green

B.Green with yellow stripe

C.Green or yellow

D.White or grey

3. Which binary number below represents decimal number 20?

A.011100

B.010101

C.111000

D.010100

4. Heat transferred by a mass motion of air is known as?

A.Conduction

B.Radiation

C.Thermal expansion

D.Convection

5. What device is the symbol below?

zener-diode-1

A.Signal diode

B.FET

C.Capacitor

D.Zener diode

Page 2 of 10

6. What method gives a good indication of the overall condition of an oil filled power transformer?

A.Voltage regulation capabilities

B.Max power output

C.Routine oil sampling analysis

D.Meggering the low voltage windings

7. Batteries used as an emergency power supply must supply the load for the time indicated in the national building code but in no case less than 30 min.

A.True

B.False

8. What is an example of a discrete input device?

A.Pressure transmitter

B.Limit switch

C.RTD

D.TC

9. What are a major cause of hot spots and discolouration of electrical equipment?

A.Tight connections

B.Wrong supply voltage

C.Loose connections

D.System frequency fluctuations

10. What is the maximum penalty that can be issued per offence to an individual found contravening OHSA or it’s regulations?

A.Fines up to $500,000 and/or 6 months of imprisonment

B.There are no penalties

C.Fine up to $25,000 and/or up to 12 months of imprisonment

D.$10,000 paid by installment's over the course of a 2 years

Page 3 of 10

11. What is one method of identify hot spots on high voltage equipment?

A.Multimeter

B.Clamp on ammeter

C.Thermal imaging camera

D.binoculars

12. A germanium diode is forward biased what is the voltage drop across it?

A.0.7v

B.1.5v

C.10.2v

D.0.3v

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

RESISTOR COLOR CODE QUESTION

A.2500Ω, 20%

B.250Ω, 5%

C.250Ω, 10%

D.25Ω, 1%

14. When installing unit equipment (unit equipment for emergency lighting) its bottom edge should be no less than?

A.Make the installation as convenient as possible

B.3m from the bottom of the floor

C.1m from the bottom of the floor

D.2m from the bottom of the floor

15. You have a 3 Φ delta transformer feeding a load but one phase of the delta tx becomes open what is the transformer configuration now called and what % of the original configuration can the transformer operate at?

A.Closed Delta, 57.5%

B.Open Delta, 57.5%

C.Open Delta, 87%

D.Scott configuration with teaser winding, 100%

Page 4 of 10

16. What rule in the Canadian Electrical code book would refer to for exit signs?

A. 46-400

B.46-304

C.10-800

D.12-3036

17. In a half wave rectifier which statement is true?

A.The output frequency is doubled

B.The output frequency is quadrupled

C.Each negative half cycle is passed through to the input

D.Each positive half cycle is passed through to the output

18. What is the following WHMIS symbol?

compressedgaspic

A.Compressed gas

B.Dangerously reactive material

C.Corrosive material

D.Oxidizing material

19. 3 phase power provides 3 alternating currents that are _______° out of phase with each other?

A.90°

B.120°

C.45°

D.0°

20. You have installed a 600v, 3 phase, 50 HP induction motor with a service factor of 1.15, what value will you set the overloads at?

A.65A

B.50A

C.60A

D.70A

Page 5 of 10

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

A.True

B.False

22. The clogged filter indication on an hydraulic system is not working properly, what is likely the cause?

A.Conductivity meter

B.Temperature transmitter

C.Differential pressure switch

D.Flow transmitter

23. How do you reverse the rotation of a 3 Φ motor?

A.Reverse the coupling

B.Add a capacitor to the circuit

C.Interchange any two leads

D.You can’t change the rotation, it is set at the factory

24. What part of a PLC performs decision making and solving of the program logic over and over?

A. PLC backplane

B.Digital output card

C.Analog input module

D.Central processing unit

25. A heat anticipator in a mechanical thermostat can correct for heating overshoot in a heating system.

A.True

B.False

Page 6 of 10

26. What is the term for the maximum reverse voltage that can be applied to a diode?

A.Avalanche

B.Breakover

C.SAS

D.PIV

27. The electrolyte in a lead acid battery consists of?

A.Water and sulfuric acid

B.Baking soda and sulfuric acid

C.Mineral oil

D.isopropyl alcohol and sulfuric acid

28. A flame rod in a residential furnace proves?

A.Gas presence

B.Combustion air

C.Flame existence

D.Combustion air flow and flame existence

29. An MSDS for a controlled product must not be more than how many years old?

A.3 years

B.5 years

C.2 years

D.1 year

30. A transducer is a device that converts physical quantities into electrical signals.

A.True

B.False

Page 7 of 10

31. Heating equipment rated at 117 KW or less shall?

A.Employ a remote indication circuit

B.Be monitored 24hrs a day

C.Be on a single branch circuit that shall be used for no other purpose

D.Be on a single branch circuit that may contain lighting equipment

32. When conductors of a fire alarm system will be installed in raceway it shall be installed in metal raceways of the totally enclosed type.

A.True

B.False

33. An industrial process ranges from a pressure of 0 psi to 1000 psi, a transmitter with an output of 4-20ma is monitoring the pressure of the process, if the process pressure is 450psi what is the transmitter output?

A.14.6ma

B.12ma

C.7.2ma

D.11.2ma

34. You are asked to look up the tightening torque in Newton/meters for a wire binding screw that will have a #12AWG installed under it, what table would you refer to?

A.Table D4

B.Table 44

C.Table 10A

D.Table D6

35. How long can a 48v, 80A/H emergency battery system feed a connected load of 200W?

A.19.8h

B.20h

C.19.2h

D.1200 minutes

Page 8 of 10

36. What class of fire is an electrical fire?

A.C

B.B

C.A

D.D

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

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

38. The FLC of a motor compressor is 45A what is the value of Locked rotor current ?

A.175A

B.135A

C.45A

D.270A

39. Lockout/tagout is applied to a disconnect switch feeding a motor, who is allowed to operate the switch while under protection?

A.Electrical foreman

B.Plant manager

C.Co-worker

D.No one is allowed

40. With a Resistor and capacitor timing circuit ,1 time constant will charge the capacitor to what percentage of the supply voltage?

A.63%

B.82%

C.24%

D.90%

Page 9 of 10

41. A factory built electrical panel includes control wiring, terminal strips and control relays, what tests must be performed on the complete electrical assembly before leaving the factory?

A. Continuity of all circuits and capacitance tests

B.Continuity and Resistance measurements

C.No tests are mandatory at the factory

D.Continuity of all circuits and insulation resistance tests

42. A drawing used to represent a 3 dimensional object in 2 dimensions is a?

A.Isometric drawing

B.Connection drawing

C.Orthographic projection

D.Electrical drawing

43. What is the minimum separation between exposed communication equipment and electrical light or power installations located in a joint use room?

A.90cm

B.90m

C.9mm

D.250mm

44. What is the max distance the disconnecting means of a small wind turbine can be located from the base of the turbine tower?

A.Must be located at the base of the tower

B.Not more than 5m from the base of the load

C.Not more than 8m but further than 3m from the base of the turbine tower

D.Not more than 9m from the base of the turbine tower

45. What is the maximum installation temperature for rigid PVC conduit?

A.85°C

B.90°C

C.60°C

D.75°C

Page 10 of 10

46. A heater rated at 4200w when supplied with 240v was mistakenly connected to 120v, what is the power consumed by the heater at this voltage?

A.4200w

B.2100w

C.1051w

D.1273w

47. Where can armoured cable rules be found in the Canadian Electrical Code book?

A.12-100

B.12-500

C.12-700

D.12-600

48. What class of hazardous location is a saw mill that continuously has the presence of sawdust in the atmosphere?

A.Class II

B.Class I

C.Class IV

D.Not classified

49. What is the minimum distance a communication jack can be installed to the inside wall of a pool?

A.2m

B.30mm

C.3m

D.10m

50. Which raceway can be bent easily without the use of tools?

A.EMT

B.Flexible metal conduit

C.Rigid metal conduit

D.All of the above

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