ECS Test Electrotechnical Questions

18. A residual current device is designed to operate in the event of one of the following:
a. overload
b. earth fault
c. lightning strike on the supply
d. short-circuit

19. Electrical installations on construction sites should be periodically inspected and tested:
a. every 3 months
b. every year
c. every 6 months
d. every month

20. The maximum AC voltage which the human body can withstand without long term physiological effects in dry conditions is:
a. 110 volts
b. 230 volts
c. 50 volts
d. 400 volts

21. Which of the following statements is true with regard to the dangers of electricity?
a. Electricity is perfectly safe so long as you wear cotton gloves
b. Electricity is only dangerous if you are not wearing wellington boots
c. Electricity is only dangerous in wet weather
d. Electricity is dangerous at any time because you cannot tell by looking at a cable whether or not it is live

22. What is the most serious effect that electric shock can have if you come into contact with a live part?
a. The electric current can cause a slight tingling in the fingers
b. The electric current can cause burn marks on the fingers
c. The electric current can cause the heart to stop, resulting in death
d. e electric current can cause the finger muscles to twitch

23. Your job involves you working near to hanging electrical cables which have bare ends. What should you do?
a. Touch the cables to see if they are live
b. Carry on working, as there shouldn't be a problem
c. Inform your supervisor and keep well away
d. Attempt to push the cables back into the ceiling void so that you can start work

24. For all live working activities it is necessary to:
a. carry out a risk assessment as required by the EAW Regulations.
b. wear rubber gloves only
c. be accompanied
d. keep your fingers crossed

25. An electrical Permit to Work is primarily a statement that:
a. someone else has taken responsibility for the work
b. the circuit or equipment is live
c. certain instructions need to be followed
d. the circuit or equipment has been isolated and is safe to work on

26. The probes of voltage detectors and test instruments used on electrical systems should be:
a. manufactured in the UK
b. accompanied by a calibration certificate
c. shaped or have barriers to prevent finger contact with the tips
d. coloured red

27. Which of the following does the Electricity at Work (EAW) regulations apply to?
a. All persons engaged for work purposes
b. elf employed persons only
c. Employees only
d. Employers only

28. The Electricity at Work Regulations require that:
a. persons working with electricity must have the appropriate level of knowledge and experience
b. a training course is necessary before anyone can work with electricity
c. only electricians can work with electricity
d. anyone supervised can work with electricity

29. The Electricity at Work Regulations apply to:
a. only low voltage systems
b. only extra-low voltage systems
c. all voltage systems
d. only high voltage systems

30. Which of the following should be used to prove a circuit or equipment is dead after isolation?
a. A lamp holder with a length of flex attached
b. A proprietary test lamp or two-pole voltage detector
c. A voltage stick
d. A multimeter

31. Which of the following is not a suitable means of isolating a circuit?
a. Removing a fuse and locking the distribution board
b. Putting insulating tape over the circuit breaker
c. Padlocking the isolating switch
d. Fitting a padlocked circuit breaker lockout

32. Which of the following work procedures on electrical systems will always require a permit-to work to be issued?
a. Dead working on low-voltage systems
b. Live working on low-voltage systems
c. Dead working on high-voltage systems
d. Live working on high-voltage systems

33. Optical fibre cable remnants should not be left lying around on site because:
a. They can be hot and burn upon contact
b. Laser beams still exist in the cut pieces
c. They can pierce the skin or eyes
d. They are toxic

34. Why should the end of an optical fibre cable never be pointed towards your own or anyone else's eyes?
a. The beam can transfer a strong electric current
b. The colour of the beam is very hypnotic
c. The beam can bore a hole through the skin
d. The beam can damage the eyes

35. The use of a multi-lock hasp with the appropriate number of padlocks is a recommended method of safe isolation where:
a. Individual circuit breaker locking off devices are not available
b. Individual circuit breakers are not identified at the distribution board
c. More than one person will be working on circuits supplied from the same distribution board
d. You know the health and safety inspector is in the area

36. Which of the following procedures should be used when more than one person will be working on circuits supplied from a distribution board which has been switched off?
a. The use of a multi-lock hasp on the isolator with a padlock for each operative
b. Blowing a horn before the power is switched on again
c. Giving each operative a volt stick
d. Telling everyone what time the power will be switched on again