This article is about HVAC Supervisor Interview Questions and Answers specially for Saudi Aramco Projects. These questions are asked normally in CBT ARAMCO Test of HVAC Discipline and for HVAC Engineers and QCs
HVAC Supervisor Interview Questions and Answers
51. Color code for identification of portable water line is
a. Yellow back ground with black lettering b. Black back ground with yellow lettering
c. Green back ground with white lettering d. White back ground with green lettering e. None of the above
52. Strip left at the joining of duct and machine.
a. Duct end b. Collar Length c. Bending Length d. Joint Length e. None of the above
53. Is this nominal capacity equal in every country?
a. Yes b. No c. None of the above d. 0
54. What is the maximum allowable length of a flexible duct?
a. 1.5M b. 2M
c. 1 d. 2.5M
e. None of the above
55. Pipe stored on racks or bearing board the support will be at least……………
a. 75mm Wide b. 90mm Wide c. 100mm Wide d. 60mm Wide e. None of the above
56. Forced main sizing shall be based on a minimum flow of velocity of……….
a. 0.8 m per sec b. 0.9 m per sec c. 1.2 m per sec d. 1m per sec e. None of the above
57. Collars and sleeves shall be inserted into flexible duct a minimum of …………….before fastening.
a. 50 mm b. 40 mm c. 32mm d. 25 mm e. None of the above
58. Flexible air ducts have rectangular UL labels attached every ……………………..
a. 3.50 m b. 1.5 m c. 3.05 m d. 2.00 m e. None of the above
59. Average slope of ground in the drainage area in meter per …….
a. 300mm b. 305mm c. 400mm d. 450mm e. None of the above
60. The minimum vent size shall be ………..
a. 50 mm b. 56 mm OD c. 32mm d. 40 mm OD e. None of the above
61. Which of the following materials are approved for water piping system?
a. Brass b. Copper c. Galvanized steel d. asbestos-cement e. All the above
62. Maximum height of decorative block wall enclosures for lift stations near residential areas
a. 1.5 mts b. 2 mts c. 2.5 mts d. 3 mts e. Prohibited in residential areas
63. Duct access door shall be a minimum of …………
a. 200mm x 200mm b. 150 x 150 mm c. 200mm x 150mm d. 300mm x 300mm e. None of the above
64. Shower head will not exceed a water supply flow rate of ………………. per minute.
a. 3.5 liters b. 6.5 liters c. 9.5 liters d. 10.5 liters e. None of the above
65. What is the minimum condensate drain piping required for HVAC equipment over 20TR to 40TR?
a. 32mm b. 38mm c. 51mm d. 25mm e. None of the above
66. The smoke dampers shall be installed in a maximium……….distance from the smoke barrier
a. 460mm b. 700mm c. 610mm d. 820mm e. None of the above
67. Connectors are more restricted and are currently limited to 14 in. (4.27 m) of installed length.
a. 4.27 m b. 4.00 m c. 3.27 m d. 2.27 m e. None of the above
68. Continuous Waste – A drain connecting the compartments of a set of fixtures to a trap or connecting other permitted fixtures to a common trap
a. Industrial Waste b. Domestic Waste c. Sewage Waste d. Continuous Waste
e. None of the above
69. What is CFM ?
a. Centerlized Fan motor b. Controlled Fan Module c. Cubic Feet Meter d. None of the above
70. How much design velocity required in the main duct of an office building?
a. 800-1100 FPM b. 900-1100 FPM
c. 900-1300 FPM d. 950-1050 FPM
e. None of the above
71. What is the appliance receiving, conditioning and delivering air supplied through an air distribution system?
a. Fan Coil Unit b. Air Terminal Unit c. Air Filter d. Air Foil
e. None of the above
72. If loose pipes are stacked on each other the stack height shall be not exceed of……..
a. 1m b. 1.5m c. 1.2m d. 1.1m e. None of the above
73. Sub lateral shall have a minimum nominal pipe diameter of……….
a. 200mm b. 150mm c. 240mm d. 100mm e. None of the above
74. Drains that have not been backfilled shall be period of………
a. 4 hrs b. 24 hrs c. 16 hrs d. 8 hrs e. None of the above
75. The maximum distance between manhole for public sewer shall be……..
a. 90M b. 120M
c. 60mm d. 200M
e. None of the above
76. Minimum size of the letter for identification on 10 inch pipe is
a. 3 inches b. 2 ½ inches c. 3 ½ inches d. 4 ½ inches e. None of the above
77. Cross-linked polyethylene/aluminum/cross-linked polyethylene (PEX-AL-PEX) pipe is approved as per which standard
a. ASTM F 1281 b. ASTM F 1282 c. ASTM A 53 d. ASTM A 312 e. ASTM A 778
78. Duct access door shall be a maximum of ……
a. 610mm x 610 mm b. 610mmmx450mm c. 450mm x 450mm d. 800mm x 600mm
e. None of the above
79. The rain leader from the roof to the building storm drain, combined building sewer, or other means of disposal located outside of the building IS ?
a. Roof Grating b. Scupper
c. Downspout d. Roof Drain e. None of the above
80. Any pressure less than that exerted by the atmosphere is ??
a. Vacuum Breaker b. Vacuum c. Back Flow d. Back Pressure e. None of the above
81. Hangers shall be placed on the coupling.
a. TRUE b. FALSE c. None of the above d. 0
82. Blow out all line with ………….. prior to testing and charging
a. Wet Air b. Dry Nitrogen c. Dry Air d. Hot Air e. None of the above
83. The lip drain funnel shall be elevated above the ground of……
a. 80mm b. 70mm c. 50mm d. 120mm e. None of the above
84. Minimum distance between two fixtures is
a. 25 inches b. 30 inches c. 15 inches d. 20 inches e. None of the above
85. Retaining angles must overlap structure opening 1 inch minimum and cover cor- ners of openings
a. 1 inch b. 2 inch c. 1.5 inch d. 3 inch e. None of the above
86. What is the Room Temperature that YOU maintain in any room?
a. 24C b. 28C c. 26C d. 18C e. None of the above
87. Which gas is used to purge the refrigerant line during the brazing?
a. Argon b. Mythel c. nitrogen d. inert gas e. None of the above
88. What device shall be provided at the or close to the highest elevation within the chilled water system?
a. Automatic Air vent b. Mixing plenum Box c. Turning Vanes d. Dampers e. None of the above
89. Such funnels shall be located within the sealed manhole or within the drainage are……..
a. 15m b. 12m c. 14m d. 10m e. None of the above
90. Pipe and pipe fitting, trap, fixture, material, and device used in a plumbing system shall have cast, stamped, or indelibly marked on….. ………
a. Each One b. Randomly c. Minimum 5 in bundle d. Minimum 2 in bundle e. None of the above
91. Support to be provided at alternate horizontal branch connection.
a. TRUE b. FALSE c. None of the above d. 0
92. The vent shall be water tight for period of ………
a. 4 hrs b. 24 hrs c. 16 hrs d. 8 hrs e. None of the above
93. Support adjacent to joint, not to exceed ………………
a. 350mm b. 300mm c. 457 mm d. 400mm e. None of the above
94. Volume dampers shall be located minimum of ……. Duct sizes away from thefittings
a. Three b. Two c. One d. Four e. None of the above
95. The horizontal between drain opening and catch basin or the manhole shall not exceed…
a. 15meter b. 12meter c. 14meter d. 10meter e. None of the above
96. Which of the following fixture should not equipped with strainers?
a. Bath tub b. Water closet c. Wash basin d. Kitchen sink e. None of the above
97. Which is intended to restrict the spread of smoke in HVAC systems that are designed to be automatically shut down in the event of fire ?
a. Smoke dampers b. Fire dampers c. Leakage Rated Dampers d. Ceiling Dampers
a. Smoke dampers b. Fire dampers c. Leakage Rated Dampers d. Ceiling Dampers e. None of the above
98. What is ASHRAE?
a. Association of Heating Refrigeration and Air- conditioning Engineers
b. American Society of Heating Refrigeration and Air-conditioning Engineers
c. American Society of Heating and Refrigeration Engineers
d. American Society of Heater and Air-conditioning Engineers
e. None of the above
99. At what temperature degree Ferhenite & degree Celsius are same?
a. 400C b. ─400C c. ─450C d. ─350C e. None of the above
100. Blow out all line with ………….. prior to testing and charging
a. Wet Air b. Dry Nitrogen c. Dry Air d. Hot Air e. None of the above
Answers:
| 51 | C |
| 52 | B |
| 53 | A |
| 54 | A |
| 55 | A |
| 56 | B |
| 57 | D |
| 58 | C |
| 59 | B |
| 60 | C |
| 61 | E |
| 62 | D |
| 63 | B |
| 64 | C |
| 65 | D |
| 66 | C |
| 67 | A |
| 68 | D |
| 69 | C |
| 70 | B |
| 71 | B |
| 72 | B |
| 73 | A |
| 74 | A |
| 75 | A |
| 76 | C |
| 77 | A |
| 78 | A |
| 79 | C |
| 80 | B |
| 81 | B |
| 82 | C |
| 83 | A |
| 84 | B |
| 85 | A |
| 86 | A |
| 87 | C |
| 88 | A |
| 89 | A |
| 90 | A |
| 91 | B |
| 92 | A |
| 93 | C |
| 94 | B |
| 95 | B |
| 96 | B |
| 97 | C |
| 98 | B |
| 99 | B |
| 100 | C |
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