HVAC-PLUMBING QC INSPECTOR CBT ARAMCO INTERVIEW QUESTIONS
1. WHAT IS VFD?
VARIABLE FREQUENCY DRIVE
2. WHAT IS THE DEVICE ARRANGE TO SEAL OFF AIR FLOW AUTOMATICALLY THROUGH A PART OF AN AIRDUCT SYSTEM SO AS TO RESTRICT THE PASSAGE OF SMOKE?
FIRE SMOKE DAMPER
3. WHAT DOES A RECTANGULAR ELBOW OF LOW VELOCITY DUCT SYSTEM DO NOT REQUIRE TO HAVE TURNING VANE?
IF THROAT RADIUS IS EQUAL TO DUCT WIDTH.
4. A NON WOVEN GEO THERMAL TEXTILE WITH UNIT WEIGHT OF AT LEAST OF____?
100 GRAMS
5. THE SURFACE SLOPE TO CATCH BASIN SHALL BE NOT LESS THAN OF ____?
1.5 % SLOPE
6. PLASTIC PIPE SHALL BE SUPPORTED AT EACH STORY OR A MINIMUM INTERNAL OF?
3MTS (10FEET)
7. WHICH TYPE OF JOINT APPROVED FOR CPVC PIPES..
SOLVENT CEMENTED JOINT
8. FOR APPROVAL OF LEAK TEST FOR SEWER LINE ABOVE GROUND SHALL BE WATER TIGHTFOR A PERIOD OF?
4HRS
9. UNLESS OTHERWISE SPECIFIED STEEL SHEET AND STRIP USED FOR DUCR CONNECTORS HAVE THE MINIMUM YIELD STRENGHT OF…….?
30,000 PS
10. UP TO 120" (3048MM) WIDTH TIES SHAL BE SPACED AT EVEN INTERVAL OF DUCT WIDTH NOT EXCEEDING ...?
1524 MM
11. WHICH ARE AUTOMATICALLY SHUT DOWN IN THE EVENT OF A FIRE OR FOR AIR TRANFER OPENING IN THE WALLS OR PARTITION ...?
FIRE DAMPER
12. DAMPER CAN BE INSTALLED IN EXHAUST DUCT SYSTEM ...?
FALSE
13. WHERE LEAD FLASHING MATERIALS IS USED, IT SHALL BE MINIMUM OF ...?
FOUR (4) POUND PER SQUARE FOOT
14. SOLVENT CEMENT FOR THERMOPLASTIC SHALL BE STORED TEMPERATURE OF ...?
26-70 %
15. PVC PIPE AND FITTINGS SHALL BE USED FOR COLD WATER DISTRIBUTION SYSTEM OUTSIDE THE BUILDING SHALL BE...?
48.8 DEG. C
16. CPVC PIPE AND FITTINGS ARE USED FOR BOTH ...?
HOT AND COLD WATER SYSTEM
17. THE MAXIMUM FORCE REQUIED TO OPEN A STSIR DOORUNDER MAXIMUM STARI PRESSURE CONDITION SHOULD BE LIMITED TO ...?
30 LBS
18. GRILLES ARE ONLY WO WAY 4 WAY TYPE ... TRUE OR FALSE?
FALSE
19. WHAT IS THE PART ON THE REFRIGERATION SYSTEM THAT IS DESIGNED TO LIQUID REFRIGERANT VAPOR BTY THE REMOVAL OF HEAT ...?
CONDENSER
20. WHAT IS FULL RADIUS-RADIUS OR LONG SWEEP ELBOW ...?
INSIDE RADIUS IS LESS THAN WIDTH OF THE DUCT
21. GASKET, O RING AND LACKING KEYS BE STORED FLAT ON THE RACK BELOW ...?
38 DEG C.
22. THE MAXIMUM DROVE OF EACH BASIN FROM POINT OF PAVING SHALL BE ...?
200MM
23. FASTENER USED ON STEEL DUCT SHALL BE ...?
STEEL
24. DUCT WITH INTERIOR WIDTH OF ………….. OR LESS DO NOT REQUIRE MECHANICAL FASTENER IN ADDITION TOADHESIVE
200MM
25. HOT AND COLD WATER SUPPLY, IT SHALL BE TESTED UNDER PRESSURE OF ...?
150 PSI
26. A DEVICE OR MEANS TO PREVENT BACKFLOW INTO POTABLE WATER SYSTEM ...?
BACKFLOW PREVENTOR OR CHECK VALVE
27. FOR APPROVAL OF LEAKTEST FOR SEWER LINE THAT HAD BEENBACKFILLEDSHALL BE WATER TIGHT FOR A PERIOD OF ...?
24 HRS
28. A CONTINUOUS MEMBRANE USED TO SUBDI-VIDE A CONCEALED SPACE TO RESTRICT THE PASSAGEOF SMOKE, HEAT AND FLAMES ...?
DROP STOP
29. DUCT SYSTEM CAN BE INTERCONNECTED WITH ANY BUILDING VENTILATION OR EXHAUST SYSTEM...TRUE OR FALSE..?
FALSE
30. LEAD BEND AND LEAD STRAPS SHALL NOT BE LESS THAN ...?
3.2MM
31. PIPE STORED ON RACKS OR BEARING BOARD, THE SUPPORT WILL BE AT LEAST ...?
75MM WIDE
32. THE MINIMUM HEIGHT OF HANGERS WIDTH FOR PLASTIC PIPE SHALL BE ...?
50 MM
33 WHAT SHOULD BE THE HEIGHT OF HEADER FROM WHERE WATER WILL BE FILLED FOR DRAINAGE LEAK TEST ...?
3 MTS HT.
34. IN AN SMOKE CONTROL SYSTEM ACEPTANCE TESTING, WHICH ONE IS MOST IMORTANT ...?
COMPONENT TESTING, PERPORMANCE TESTING, FUNCTIONAL TESTING & DOCUMENTATION
35. FLEXIBLE DUCT SHALL BE SUPPORTED AT THE MANUFACTURER RECOMMENDATIONINTERVAL BUT AT LEAST EVERY ...?
5' FT INTERVAL
36. BEND SHALL BE MADE WITH NOT LESS THAN ____________ CENTER LINE RADIUS..
ONE DUCT DIAMETER
37. BUTTERFLY DAMPER IS A FIRE DAMPER ...?
FALSE
38. WHAT IS THE MEANING OF FAHU ...?
FRESH AIR HANDLING UNIT
39. WHAT DOES A RECTANGULAR RADIUS DOES NOT REQUIRE TO HAVE TURNING VANES ...?
GAITER LINE RADIUS IS 1-1/2 THE DUCT WIDTH
40.THE MINIMUM SURFACE TRAVEL OF ANY LIQUID TO A CATCH BASINSHOULD NOTGREATER THAN ...?
10 MTS
41. THE MINIMUM SPACING BETWEEN DRAINAGE INLET SHOUL NOT EXCEED TO ...?
90 MTS
42. TRAP USED IN PRESSURERIZED BUILDING AS DESCRIBED SHALL HAVE MINIMUM TRAP SEAL OF ...?
100MM (4"dia)
43. VALVE WHICH IS INSTALLED FOR CONTROLLING AT DISCHARGE SIDE OF WATER METER IS ...?
FULL WAY VALVE
44. A WALL OF FIRE RATED CONSTRUCTION WHICH SERVICE TO DEVIDE THE FLOOR AREA OF A BUILDING INTO ACCEPTABLEAREA LIMITS ...?
AREA SEPARATION WALL
45. DUCT SHALL NOT PASS THROUGH FIRE WALL OR FIRE PARTITION ...?
TRUE
46. METAL DRAINS PAN SHALL BE OF ______ COATED GALVANIZED STEEL.?
G90
47. LEACKAGE TEST PRESSURE SHOULD HAVE AVERAGE CONSUMPTION OF NOT MORE THAN ...?
6.1 LTS
48. WHAT IS THE APPLIANCE RECEIVING . CONDITIONING AND DELIVERING AIR SUPPLIED THROUGH AN AIR DISTRIBUTION SYSTEM ...?
AIR TERMINAL UNIT
49. COLOR CODE FOR IDENTIFICATION OF POTABLE WATER LINE IS ...?
GREEN
50. STRIP LEFT AT THE JOINING OF DUCT AND MACHINE ...?
COLLAR JOINT
51. WHAT IS THE MAXIMUM ALLOWABLE LENGTH OF FLEXIBLE DUCT ...?
1.5 MTS
52. FORCED MAIN SIZING SHALL BE BASED ON MAXIMUM FLOW OF VELOCITY OF...?
0.9 M PER SEC.
53. COLLARS AND SLEEVES SHALL BE INSERTED INTO FLEXIBLE DUCT MINIMUM OF..
25MM BEFORE FASTENING
54. FLEXIBLE AIR DUCT HAVE RECTANGULAR UL LABELS ATTACHED EVERY ...?
3.05 MTS
55. AVERAGE SLOPE GROUND IN THE DRAINAGE AREA IN METER PER ...?
305 MM
56. THE MAXIMUM VENT SIZE SHALL BE ...?
50 MM DIA
57. WHICH IS THE APPROVED MATERIALS IN THE PIPING SYSTEM ...?
BRASS, GALVANIZED, COPPER ASBESTOSS CEMENT & CPVC
58. MAXIMUM HEIGHT OF DECORATIVE BLOCK WALL FORLIFT STATION NEAR RESIDENTIAL AREAS ...?
3 MTS
59. DUCT ACCESS DOORS SHALL BE MINIMUM OF ...?
150MM X 150MM
60. SHOWER HEAD WILL NOT EXCEED A WAETR SUPPLY FLOW RATE OF ...?
9.5 LTS
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