Khoon Electrical Competency Test
Khoon Electrical Competency Test
Test your knowledge of electrical standards and installation practices with the Khoon Electrical Competency Test. This comprehensive quiz contains 38 multiple-choice questions designed to assess your understanding of various electrical competencies.
Key Features:
- Varied question topics covering electrical installations
- Scoring system to track your competency
- Instant feedback on your answers
1) What is the distance of the saddles to be installed for vertical LPS down conductor?
500mm
600mm
700mm
800mm
2) What is the distance of the saddles to be installed for horizontal LPS aluminium tape?
500mm
600mm
700mm
800mm
3) How much must the vertical down conductor to be away from the edge of the wall?
100mm
200mm
300mm
400mm
4) Based on SS555 5.3.6 Para 3, what is the height of the test link box required to be installed?
1200mm
1500mm
1800mm
2200mm
5) At what FFL height is the bi-metallic required to be installed?
2200mm
2400mm
2500mm
2600mm
6) What is the length of the electrode earth rod?
1200mm
1500mm
1800mm
2100mm
7) What type of GI conduits are supposed to be used to install for HDB project?
Class 1
Class 2
Class 3
Class 4
8) For horizontal trunking/cable tray at first storey, the fixings and supports shall be installed at regular intervals not exceeding _______?
1000mm
1100mm
1200mm
1500mm
9) What type of cable support (conduit) shall be used to install at carpark for electrical services based on surface installation method?
PVC conduit
Metal conduit
All of the above
None of the above
10) What type of cable support (conduit) shall be used to install at carpark/commercial for Fire Protection System (fire alarm) surface installation method?
PVC conduit
Metal conduit
All of the above
None of the above
11) What type of cable support (conduit) shall be used to install in service room for electrical services/fire alarm?
PVC conduit
Metal conduit
All the above
None of the above
12) For main earth cable at level 1 bulk meter, what is the earth cable required to be used?
50sqmm
70sqmm
95sqmm
120sqmm
13) For main gas cable at level 1, what is the earth cable required to be used?
50sqmm
70sqmm
95sqmm
120sqmm
14) What is the min requirement for lift trunking?
150x75mm
60x50mm
100x50mm
75x50mm
15) If standby generator is provided for the wet rising main system, the generator shall be shared by up to _____ blocks?
1
2
3
4
16) For 15A SSO to be installed at residential corridor, what is the distance required for one powerpoint to another?
15m
25m
35m
45m
17) For residential unit above 26 storeys, what is the width of the telecom trunking required under COPIF 2018?
200x100mm
300x100mm
400x100mm
500x100mm
18) The following equipment/accessories are required for MSB power turn on I. CPR Chart ii. Fire Extinguisher iii. Sand Filling of the cable trench iv. Endorsed SLD v. Outgoing cable to be fully completed vi. 400V Danger Sign
I, ii, iii, iv, vi only
I, ii, iv, v, vi
I, ii, iii, iv,v
All the above
19) For MCCB rating of 200A TPN, what is the typical size of the cable used for main riser?
4x50sqmm XLPE/PVC + 25 XLPE/PVC Earth
4x70sqmm XLPE/PVC + 35 XLPE/PVC Earth
4x95sqmm XLPE/PVC + 50 XLPE/PVC Earth
4x150sqmm XLPE/PVC + 75 XLPE/PVC Earth
20) What is the minimum width a DB is closet is required based on HDB guide drawing?
650mm
700mm
750mm
800mm
21) For water/gas pipe bonding in the riser, what is the earth cable size required to be used?
25sqmm
16sqmm
10sqmm
6sqmm
22) For water/gas pipe bonding in the riser, the earth cable must go to the ______ pipe first and then loop to the ______ pipe.
Water, gas
Gas, water
Either or also can
No looping. 2 separate earth cable to the respect water/gas pipe
23) What is the height for the bottom of the unit CCU to be installed in the DB closet?
1200mm
1500mm
1600mm
1800mm
24) What is the typical cable size that unit’s lighting point used?
1.5sqmm PVC
2.5sqmm PVC/PVC
2.5sqmm PVC
1.5sqmm PVC/PVC
25) What is the typical cable size that units’ powerpoint, heater point, and isolator used?
1.5sqmm PVC
2.5sqmm PVC/PVC
2.5sqmm PVC
1.5sqmm PVC/PVC
26) For embedment/concealment less than ____mm, the concealed pipe for electrical wiring has to be metal(GI) conduit.
20mm
30mm
40mm
50mm
27) The depth of the ko box and lighting point inside the household shelter must not be more than ____mm.
20mm
30mm
40mm
50mm
28) Mounting for back-to-back accessories are to be _______mm minimally away on drywall/infill wall from each other. (not applicable to column wall)
50mm
100mm
150mm
200mm
29) Which of the following units require 2 isolators for future aircon installation?
4 room
5 room
3 Gen
All of the above
30) At what height is the minimum that the bottom of the heater point is required to be installed at?
2250mm
2350mm
2450mm
2550mm
31) At the electrical riser, based on SPPG requirements, what is the height of the meterboard required to be installed?
Between 1600mm to 2200mm
Between 900mm to 1900mm
Between 850mm to 1800mm
Between 800mm to 1800mm
32) At the electrical riser, based on SPPG requirements, what is the depth of the meterboard required be to be installed from the door?
Between 100mm to 400mm
Between 400mm to 500mm
Between 200mm to 300mm
Between 250mm to 350mm
33) What is the distance from the water discharge from the kitchen sink that required the powerpoint in the kitchen to have a splash-proof cover?
700mm
800mm
900mm
1000mm
34) How high based on the top of the isolator for the aircon is supposed to be installed FFL?
450mm
700mm
900mm
1200mm
35) How many conduits from telecom riser to unit are to be installed for each unit?
2
3
1
None of the above
36) How many conduits from telecom riser to units are to be provided with draw ropes?
2
3
1
None of the above
37) Prior to the HDB_______ testing, the periodic RCCB testing labelling must to be pasted on the Unit CU cover?
MSB
Unit
SP Pre Turn On
Unit Cable Tightening
38) What is the size of the restricted zone at the hob area that prohibits electrical accessories to be installed?
100x100
200x200
300x300
400x400
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