Electrical Instrumentation Inspection and QC Questions

Electrical Instrumentation Inspection and QC Questions

1. WHAT IS THE STANDARD WIRE FILL REQUIREMENT FOR CONDUIT SEALING FITTING ?

a) 30% b) 20% c) 25% d) 15%

2. WHAT IS THE DISTANCE REQUIRED BETWEEN SUPPORTS FOR RIGID METAL CONDUIT ON HORIZONTAL STRAIGHT RUN?

a) 12 feet b) 15 feet c) 10 feet d) 5 feet

3. PER NEC HOW MANY DEGREES BEND PERMITTED IN A CONDUIT RUN?

a) 180° b) 360° c) 275° d) 45°

4. PER NEC HOW MANY THREADS SHOULD BE ENGAGED IN HAZARDOUS AREA?

a) 4 threads b) 15 threads c) 5 threads d) 9 threads

5. UL STANDS FOR WHAT?

a) Underwriters Laboratories b) United Laboratories

6. FM STANDS FOR WHAT?

a) Factory Mutual Research Corp. B) Factory made

7. CSA STANDS FOR WHAT?

a) Canadian Standard authority B) Canadian Standards Association

8. PER NEC WHAT IS THE MAXIMUM NUMBER OF OVER CURRENT DEVICES ALLOWED IN BRANCH CIRCUIT PANEL BOARD?

a) 45 b) 58 c) 42 d) 16

9. PER NEC WHAT IS THE MINIMUM WORKING CLEARANCE REQUIRED IN FRONT OF  LOW VOLT ELECTRICAL EQUIPMENT?

a) 900 mm b) 800 mm c) 700 mm d) 600 mm

10. WHAT ARTICLE IN NEC YOU CAN FIND GROUNDING SYSTEM?

a) 255 b) 250 c) 300 d) 150

11. PER NEC WHAT IS THE PERCENT AMPACITY OF BRANCH CIRCUIT SUPPLYING SINGLE PHASE MOTOR-COMPRESSER?

a) 50% b) 35% c) 100% d) 125%

12. ALL TECHNIQUES USED TO COMPLY WITH AREA CLASSIFICATION REQUIREMENTS  SHALL COMPLY WITH…

a) NEC chapter 5 b) NEC chapter 6 c) NEC chapter 2 d) NEC chapter 1

13. EACH DEVICE OF 50 V ( AC or DC ) OR GREATER..

a) Shall have its own individual lockable disconnect switch with appropriate labling

b) Either local or remote lockout is not permissible.

c) Either local or remote lockout is permissible.

14.PER NEC TABLE-1, CHAPTER-9, WHAT IS PERCENT OF CONDUIT FILLING FOR 2CONDUCTORS?

a) 31 b) 45 c) 19 d) 21

15. HOW MANY GROUNDING SYSTEM ARE REQUIRED FOR INSTRUMENTATION SYSTEM ?

a) 3 b) 5 c) 2 d) 1

16. CABLE TRAY INSTALLATION SHALL BE DONE AS PER ?

a) NEMA-250    b) SAES-J 2    c) NETA d) NEMA-VE-2

17. WHAT DISTANCE IS REQUIRED BY NEC BETWEEN ENCLOSURE AND CONDUIT SEAL FITTING ?

a) 1” b) 2” c) 18” d) 4”

18. PER SAES-J-902 ALL CONNECTION AT THE FIELD INSTRUMENTS SHALL BE MADE ON

a) PIN type terminal block b)Screw type terminal block

19. PER SAES-P-111 THE SYSTEM GROUND RESISTANCE FOR ABOVE 600 V SHALL BE LESS THAN.

1 ohm

20. PER SAES-P-104 REDUNDANT FEEDERS SHALL BE SEPARATED BY A MINIMUM DISTANCE OF

1.8 meter

21. PER SAES-J-902 CONDUIT AND CABLE ENTRIES TO FIELD INSTRUMENT J.B. SHALL BE THROUGH.

a) Bottom b) Top c) Side d) No one

22. ON LOWEST POINT OF CONDUIT SYSTEM…………. SHALL BE PROVIDED.

a) Drain b) LBH c) Union d) Plug

23. PER SAES-J-902 TOP ENTRY OF …….CABLE INTO THE JUNCTION BOX IS NOT ACCEPTABLE.

a) Control b) Armored c) Power d) Instrument

24. PER SAES J-902 TERMINALS SHALL BE MOUNTED ON …………DIN RAIL.

a) Vertical b) Horizontal c) Top d) No one

25. PER SAES-J-902 IN SEVERE CORROSIVE ENVIRONMENTS.…SS FASTENERS SHALL BE USED.

a) 316 b) 304 c) 333 d) No one

26. PER SAES-J-902 ALL SIGNAL WIRING FROM FIELD CABLES SHALL BE TERMINATED IN.

a) J.B b) A.J.B c) Marshaling cabinets d) No one

27. COMBUSTIBLE LIQUID IS A LIQUID THAT HAS A FLASH POINT GREATER THAN.

a) 54ْC

28. INSTRUMENT HOMERUN CABLES SHALL BE TAGGED WITH THE ASSIGNED….CABLE NUMBER.

a) IC b) PC c) CC d) No one

29. PER SAES-P-111 FRAMS OF EQUIPMENTS OPERATING @ 1000 V OR GREATER SHALL HAVE………CONNECTION TO SUPPLEMENTARY ELECTRODE.

a) one b) Two c) Three d) Four

30. PER SAES-P-111 THE MINIMUM SIZE FOR BURIED COPPER GROUND GRID IS.

b) 70mm²

31. PER SAES-P-111 THE MINIMUM SIZE FOR COPPER GROUND ROD IS.

a) 2 meters b) 5 meters c) 2.4 meters d) 1.5 meters

32. PER NEC THE MINIMUM SIZE FOR COPPER NEUTRAL CONDUCTOR IS.

a) 8 AWG b) 6 AWG C) 1/0 AWG d) 2/0 AWG

33. PER NEC RMC SHALL BE FASTENED WITH IN …. OF EACH BOX.

a) 900 mm b) 955 mm c) 800 mm d) 100 mm

34. IN WHICH TABLE OF NEC YOU CAN FIND THE MAXIMUM DISTANCE BETWEEN RMC SUPPORTS.

a) 344.30(B)(2) b) 345.6 c) 265.67 (D) d) 100

35. PER NEC EACH LENGTH OF RMC SHALL BE CLEARLY AND DURABLY IDENTIFIED IN EVERY

a) 4 Meters b) 3 Meters c) 2.7 Meters d) 1 Meter

36. PER SAES-P-104 IN OUT DOOR NON-INDUSTRIAL AREAS, EQUIPMENTS AND TERMINAL ENCLOSURES SHALL BE..

a) Nema Type 3R, 3 or 4 b) Nema TC 6 c) Red Colour d) Nema TC 8

37. Motor branch circuit voltage drop shall be……….

a) 1% maximum b) 2% maximunm c) 3% maximum d) 4% maximum

38. Underground cables may be installed………

a) In multiple layers, directly buried, provided a 100 mm sand cushion is placed between layers

b) In direct buried PVC conduits

c) Directly buried rigid galvanised steel conduits

d) In directl buried rigid galvanized steel conduits

e) Directly buried under floor slabs of buildings

39. In an insulation resistance test on 600/1000 volts cables, what test voltage is applied?

a) 250 VDC b) 500 VAC c) 500DC d) 1000 VDC

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