الجزء 01 أسئلة وأجوبة أرامكو سي بي تي الكهربائية لمراقبة الجودة - Part-01 Aramco CBT Electrical

الجزء 01 أسئلة وأجوبة أرامكو سي بي تي الكهربائية لمراقبة الجودة

 01) Where floodlights are installed on steel tower, the tower shall be equipped with steel service platforms located _____ below the fixtures   

Answer:

1.5m

02) In industrial lighting, poles used in process areas shall be________  

Answer:

Hot‐Dipped Galvanized 

03) Fixtures that shall be used for high‐bay or low‐bay indoor‐industrial applications –

Answer:

High‐Pressure Sodium or Metal Halide 

04) In manned switchgear rooms and control rooms, where essential activities continue during failure of normal lighting, a minimum illumination level of ______ shall be provided at 760mm above the floor. 

Answer:

100 Lux (10 fc) 

05) An indoor location that shall be provided with enclosed and gasketed (i.e. vapor‐tight) corrosion resistant lighting fixtures. 

Answer:

Battery Rooms

06) Lighting Fixtures positioned over stairways, platforms, elevated walkways and landings shall be positioned at a height of _____ (from the bottom of the fixture to the floor directly beneath).

Answer:

             2.03m

07) 7 Minimum duration of emergency lighting in the event of power failure  

Answer:

              1.5hrs. 

08) Illuminated exit signs shall be manufactured and installed in accordance with ___________ requirements.  

Answer:

NFPA 101 

09) In SAES‐P‐123 lighting standards, what is the meaning of CRI?  

Answer:

Color Rendering Index

10) IN SAES‐P‐123 lighting standards, what is the meaning of LLF?  

Answer:

Light Loss Factor 

11) Minimum maintained illuminance level of Control Room in general  500 Lux (50 fc) 

Answer:

0

12) Minimum maintained illuminance level of Process Interfaced Buildings  

Answer:

100 Lux (10 fc)

13) Minimum maintained illuminance level of Battery Rooms  

Answer:

300 Lux (30 fc) 

14) Minimum maintained illuminance level of Switchgear Rooms  

Answer:

300 Lux (30 fc) 

15) Minimum maintained illuminance level of Outdoor Switchyards  

Answer:

20 Lux (2 fc) 

16) Minimum maintained illuminance level of General Substation (outdoor)  

Answer:

20 Lux (2 fc) .

17) Minimum maintained illuminance level of General Substation (indoor) 

Answer:

50 Lux (5 fc) 

18) Minimum maintained illuminance level of Indoor Substation Operating Aisle  

Answer:

150 Lux (15 fc) 

19) Minimum maintained illuminance level of Plant Process Areas

Answer:

50 Lux (5 fc) 

20) What is the meaning of CT  

Answer:

Current Transformer 

21) What is the meaning of VT 

Answer:

              Voltage Transformer 

22) For transformer protection system, what is the meaning of 51N 

Answer:

Neutral Overcurrent Relay 

23) For transformer protection system, what is the meaning of 50/51H  

Answer:

Phase Overcurrent Relay (HV side) 

24) For transformer protection system, what is the meaning of 50/51L

Answer:

Phase Overcurrent Relay (LV side) 

25) For transformer protection system, what is the meaning of 50/51G

Answer:

Ground Overcurrent Relay

26) For transformer protection system, what is the meaning of 87  

Answer:

Differential Relays 

27) For transformer protection system, what is the meaning of 86  

Answer:

Lockout Relays 

28) Maximum ampere rating for panel board

Answer:

400A 

29) Maximum ampere rating for switch racks  

Answer:

600A 

30) Unobstructed horizontal space for switchgear

Answer:

Front=2m; back and sides=1m 

31) Unobstructed horizontal space for control gear, switchboards, transfer switches, and floor mounted adjustable frequency drives  

Answer:

Front=1.5m; Sides=1m 

32) Unobstructed horizontal space for panel boards, switch racks  

Answer:

Front=1m 

33) Cables can be used to extend the main bus of switchgear, control gear, switchboards, switch racks, and panel boards (TRUE or FALSE)  

Answer:

FALSE

34) Maximum control voltage to be used for motor space heater  

Answer:

24V 

35) In Switchgear and control equipment system, What is the meaning of AFD 

Answer:

Adjustable Frequency Drive 

36) Cable bus shall be used with power transformers if the forced cooled site rating of the transformer is greater than ________

Answer:

1200A

37) Transfer switches shall only be used in low voltage applications (TRUE or FALSE

Answer:

TRUE 

38) Panel boards shall be installed completely filled with circuit breakers and have ______ spare breakers  

Answer:

0.2

39) Panel boards shall not be installed in control gear (TRUE or FALSE)

Answer:

TRUE

40) What is the meaning of abbreviation IEC?

Answer:

International Electro Technical Commission 

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