Worksheets18 Edition Part 6 (a)
Total questions: 12
Worksheet time: 24mins
Upon completion of a new electrical installation after successful verification and testing has taken place, what must be issued?
A. A minor works certificate
B. A new installation certificate
C. A periodic inspection certificate
D. An electrical installation certificate
An insulation test on a circuit with a nominal voltage of 600 Volts will require the test instrument to deliver a test voltage of?
1000 V
250 V
500 V
600 V
Which one of these people signs a Minor Electrical Installation Works Certificate? Mark one answer
Designer
Inspector
Person ordering the works
Skilled competent persons
What method may be used to confirm the separation of a SELV circuit from other Circuits?
By asking the manufacturer
By calculation
By enquiry
By measurement
Who shall make an initial verification of a new installation? Mark one answer
A. A skilled person
B. The architect
C. The designer
D. The person ordering the work
If all of the following tests are required in a new electrical installation, which of the listed tests must be performed first before the installation is energised? Mark one answer
Earth electrode resistance
Insulation resistance
Polarity
Protection by SELV
With regards to initial verification and testing, the verification process shall include comparison of the results with the relevant criteria to confirm that the requirements of the regulations?
Are no worse than the previous test results
Are the same as the previous test results
Have been met
Have been recorded in the schedule or works results
An insulation test on a PELV circuit must have a minimum IR value of?
0.5 MΩ
0.5 mΩ
1.0 MΩ
1.5 MΩ
The frequency of periodic inspection and testing shall be determined by which of the following? Mark one answer
The magnitude of the prospective short-circuit current
The presence of harmonic distortion
The type of installation and equipment
Who designed the installation
What is the appropriate Insulation Resistance test voltage for a 400 v a.c. motor in an industrial installation?
1000 V a.c.
250 V a.c.
500 V a.c
500 V d.c.
When performing an initial verification of a new electrical installation, which of the following does not need to be verified? Mark one answer
Connection of conductors
Identification of conductors
Routing of cables in safe zones
The earth-fault loop impedance is sufficiently low
The testing of phase sequence shall be carried out at all relevant points?
Throughout a d.c system
Throughout a single-phase system
Throughout a solar-voltaic system
Throughout a three-phase system
