Unit 18 - Prepare for general electrical installations Quiz 4
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Q1           Score:  1
 contacts
 ratings
 Physical size
 method of operation
Q2           Score:  1
 That may require independent control
 That may require under voltage
 That may require over current
 That may require over voltage
Q3           Score:  1
 Lamps
 Alarm sounder
 Main switch
 Emergency lighting system
Q4           Score:  1
 Minimum voltage and current
 Maximum voltage and current
 Maximum current and low voltage
 Maximum voltage and minimum current
Q5           Score:  1
 an RCD
 a switch
  Alarm sounder
  Surge protection device
Q6           Score:  1
 Effectively regulate voltage
  Control over current
 Effectively isolate all active conductors.
  Provide effective low impedance
Q7           Score:  1
 Capable of breaking the full load of the circuit
  Be manually operated directly interrupting the main circuit
 Capable of regulating the voltage
 Be provided with means of operation capable of latching in the “OFF” or “STOP position”
Q8           Score:  1
 Reduce the cost of wiring components
 Reduce the length of sub-circuit cables and associated voltage drop problems.
 To increase the tripping time if there is an earth fault
 To make it more comfortable for the technician
Q9           Score:  1
 Isolation
 Emergency switching
 Functional switching
 All of the above
Q10           Score:  1
 Push button on a contactor
 Manual operated switch
 Miniature circuit breaker
 Plug and socket


   



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