Download HVAC Journeyman Test Exam 2024-2025: Questions and Answers and more Exams Refrigeration and Air Conditioning in PDF only on Docsity!
OK HVAC Journeyman Test EXAM 2024 - 2025 QUESTIONS AND
ANSWERS 100 % PASS SOLUTION
A- 1000°F (IFGC - 202) - answer>>What is the minimum melting temperature for brazing material? A- 1000°F B- 600°F C- 800°F D- 1200°F C- dew point - answer>>The is the temperature below which water vapor in the air will start to condensate A- wet bulb point B- dry bulb point C- dew point D- sensible point B- 15 (IMC - 603.3) - answer>>Ducts shall be classified based on the maximum operation pressure of the duct at pressures of positive or negative of all, except which of the following from a water column. A- 1 B- 15 C- 10 D- 0. D- 40 (IMC - 302.3.3) - answer>>A Hole is board into a wood stud its diameter cannot be more than percent of the stud. A- 25 B- 75
C- 60
D- 40
A- 187 V - answer>>The starting running voltage used on a 208 V motor is A- 187 V B- 228 V C- 175 V D- 208 V B- 10 feet (IMC - 304.11) - answer>>A technician is installing an electrical power to plants. A guard rail will be installed later on international mechanical code must be implemented. The roof is 8 foot above the grade below what would be the least distance between the appliance in the roof edge? A- 8 feet B- 10 feet C- 6 feet D- 4 feet A- oils that react chemically with refrigerant - answer>>What is a technician you are responsible to select and to handle refrigerants from the list below name the type of refrigerant oils you must avoid A- oils that react, chemically with refrigerant B- oils that are dry and moisture free C- oils that are fluid at low temperature D- oils that are stable at high temperature A- interrupted (IMC - 604.8) - answer>>During inspection duct linings at the area of operation of a fire damper, we're not approved to pass next inspection. The duct linings must be. A- interrupted
B- 16
C- 14
D- 12
C- leaky suction valve - answer>>A deep vacuum is an evacuation method in which a technician uses a vacuum pump (or the systems compressor) to pull a vacuum until no moisture or other vapor remains in the system. If the compressor is used for this procedure, but CANNOT produce a deep vacuum, which of the following would be the problem? A- bad TXV B- low refrigerant C- leaky suction valve D- leaky exhaust valve B- 1,000 CFM (IMC - Table 403.3.1.1 , lists darkrooms at 1.0CFM/Sq-ft. Therefore, calculate; 1.0CFM/Sq- ft x 1000 Sq-ft = 1,000CFM) - answer>>What would be the minimum ventilation exhaust flow rate for a 1,000 Sq-ft darkroom? The ventilation system must be designed to supply the required rate of ventilation air continuously during the period the building is occupied "24/7". A- 10,000 CFM B- 1,000 CFM C- 180 CFM D- 120 CFM D- 14 inch diameter (ACCA Ductulator (duct slide rule) align 0.095 on galvanized metal duct /w 1000CFM = 14" round duct. 14 inch diameter) - answer>>Use a duct slide rule to determine required round steel duct size for a sheet metal duct system showing a pressure drop of 0.25 IWC, delivers 1,000CFM, has a total effective length of 263 feet, and a friction rate of 0.095 IWC/100. A- 12 inch diameter B- 10 inch diameter C- 16 inch diameter
D- 14 inch diameter C- 225CFM (IMC - TABLE 403.3.1.1 - answer>>What is the minimum required outdoor ventilation rate for a residence with three bedrooms, the bathrooms, one kitchen, and a 133 square foot one-car garage? (Assume continuous exhaust for kitchen and bathrooms.) A- 115 CFM B- 175 CFM C- 225 CFM D- 295 CFM C- 6660 BTUh (BTUh= 120CFM x 50deg F x 1.08 = 6480BTUh) - answer>>The Manual J specific heat formula used for changing the temperature is CFM=BTUh/(1.08 x Change Temperature). Therefore, what would be the required heat input in BTUs to raise air quantity of 120CFM from the cold temperature of 30 deg F to a warm temperature of 80 deg F (without and altitude correction factor)? A- 8573 BTUh B- 7824 BTUh C- 6660 BTUh D- 5231 BTUh B- portable, power-driven circular saws - answer>>According to OSHA, upper and lower guards shall be equipped on... A- grinding machines B- portable, power-driven circular saws C- hand-fed crosscut table saws D- hand-fed ripsaws A- 24 (IMC - TABLE 603.4 lists the required aluminum thickness of 0.018 inches minimum, for a round duct less than 12 inches diameter. A standard sheet metal thickness gauge table will list the thickness of 24 gauge aluminum as 0.0201 inches, and the thickness of 26 gauge aluminum as 0.0159 inches (too
D- 20 feet C- 25 - answer>>Coverings and linings, including adhesives when used, she'll have a flame spread index of not more than. A- 250 B- 50 C- 25 D- 10 C- 125cfm (IMC - TABLE 403.3.1.1 - 2500 sq ft x 10 occupants per 1000 sq ft = 25 occupants. 5cfm per person c 25 occupants = 125cfm ) - answer>>What is the people outdoor air flow required in a 2500 square-foot pharmacy? A- 450cfm B- 180cfm C- 125cfm D- 75cfm D- 9 inches (IFGC - TABLE 308.2) - answer>>What is the required vertical clearance for combustible construction for event that is protected with 0.024 sheet metal with ventilated airspace the required clearance with no protection is 18 inches. A- 6 inches B- 24 inches C- 18 inches D- 9 inches A- 3/4 to 1 - answer>>According to OSHA, all simple slope, excavations, 20 feet or less in depth, shall have a MAXIMUM slope of.. A- 3/4 to one
B- 1/2 to one C- 1 to 1 D- no requirement B- low (IFGC - 202) - answer>>A drip place at what point in a system of piping to collect condensation. A- mid B- low C- average D- high A- 22 inches (IMC - 306.4) - answer>>What is the minimum width of a passageway to an appliance installed under floors? A- 22 inches B- 30 inches C- 20 inches D- 24 inches A- cast iron (IMC - 1107.5) - answer>>Pipes of or not accepted to be used for refrigerant lines. A- cast iron B- red brass C- schedule 80 carbon steel D- schedule 40 carbon steel C- 37.5 cfm (IMC - 406.1) - answer>>What is the minimum mechanical rate for a 1875 square-foot attic? A- 30 cfm B- 25 cfm
C- as outlet temperature decreases D- as outlet temperature increases C- lockout - answer>>Equipment or circuits that are deenergized shall be rendered inoperative by placing a device to avoid equipment, or the circuit from becoming energized, is referred to as. A- safeguarded B- protected C- lockout D- secured A- 12 threads (IFGC - TABLE 403.9.2) - answer>>Specifications indicate that a 3 inch steel gas will have approximately threads to be cut. A- 12 threads B- 8 threads C- 14 threads D- 10 threads D- 5 feet (IFGC - 401.5) - answer>>For other than black steel pipe, exposed piping should be identified by a yellow label marked 'gas' in black letters. What is the maximum spacing of the marketing? A- 3 feet B- 2 feet C- 6 feet D- 5 feet D- 6 (IFGC - 411.1.3.1) - answer>>Except for arranging dryer connectors, the maximum length of approved listed, flexible, metal tubing for fuel gas connectors is feet. A- 2
B- 3
C- 4
D- 6
D- bedroom (IMC - 601.5(7)) - answer>>Return air openings for heating ventilation and air conditioning systems shall not be taken from the closet, bathroom toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic, however, a is not prohibited A- boiler room B- furnace room C- unconditioned attic D- bedroom A- 16 (IMC - TABLE 803.9(2)) - answer>>The minimum thickness for galvanized chimney connector of 14 inches round and small are used for high. Heat appliances is gage. A- 16 B- 12 C- 14 D- 10 D- half inch non-combustible insulation board with ventilated air space (IFGC - TABLE 308.2) - answer>>Identify the type of protection needed
- Equipment: gas-fired
- Clearance wall requirement: 18 inches
- Minimum side clearance desired: 6 inches Best protection would be : A- 24 gauge sheet metal with no ventilated airspace B- 3 1/2 inch masonry wall with no ventilated airspace
C- steel D- soldering C- Backdraft damper (IMC - 505.3) - answer>>Domestic range hood duct, shall be equipped with which of the following? A- clean B- none of the above C- Backdraft damper D- grease filter D- 12 inches (IMC - 502.8.1.1(5)) - answer>>Combustion ventilation and dilution air regulations state that a fuel burning appliance installed in a limited space with an opening to supply, combustion air, shall commence within from the top of the enclosure. A- midway between floor and ceiling B- 24 inches C- 18 inches D- 12 inches A- 5 feet - answer>>OSHA mandates that trench protection, or sleeping over ditch to be at least feet deep. A- 5 feet B- 7 feet C- 3 feet D- 4 feet C- 12 inches (IFGC - 304.5.3.1, 304.6.1) - answer>>Using the two permanent openings method, a duct supplying combustion air to fuel burning appliances must be within a maximum inches from the floor. Be aware of this duct is in a confined space.
A- 24 inches B- 18 inches C- 12 inches D- 3 inches C- exhibit a flame travel/spread of 5 feet or less (IMC - 602.2.1.1) - answer>>Exposed optical, fiber, raceways installed in concealed spaces above suspended ceilings, used as air plenums shall. A- not be permitted by the 2003 international mechanical code B- have a Maxximum flame spread index of 25 C- exhibit a flame travel/spread of 5 feet or less D- have a maximum smoke developed rating of 50 D- high limit - answer>>The control automatically shuts off the gas if the water temperature pressure gets too high, in a gas fired hydraulic system. A- thermostat B- pressure relief valve C- primary stack control D- high limit D- where average temperature conditions exist - answer>>And air conditioning system thermostat should be placed. A- near a door or window B- near an air duct C- where there is a wide range in temperature D- where average temperature conditions exist
D- 100 in.² C- when a label shows the exact location (IMC - 604.10) - answer>>Give me the correct option when a service opening needs to be covered while insulating a duct? A- no case B- when the service opening is not frequently used C- when a label shows the exact location D- went a cut out is made D- air (IMC - 1108.2) - answer>>Which of the following is used to test R-717? A- liquids B- gas C- fluids D- air C- 18 inches (IFGC - 305.3) - answer>>What is the minimum height of an ignition source above the floor in a private garage? A- 6 inches B- 12 inches C- 18 inches D- 24 inches C- 25 feet - answer>>What's the maximum lateral distance a worker in a trench must be from a means of egress? A- 10 feet B- 15 feet C- 25 feet
D- 50 feet B- protective pipe (IMC- 404.7) - answer>>A worker needs to install a Stihl gas pipe underground through a foundation wall he must provide a(an): A- insect guard B- protective pipe C- fire caulking D- metal pipe flange. B- 4 (IMC - 507.4.1) - answer>>For canopy type commercial cooking hoods, the vertical distance between the lip of the hood and the cooking surface shall not be more than feet. A- 3 B- 4 C- 5 D- 6 C- 1" (IMC - TABLE 401.5) - answer>>Maximum screen opening size approved for fresh air ventilation caps in commercial applications is inches. A- 0.75" B- 0.25" C- 1" D- 0.50" D- 90° (IFGC - 405.2) - answer>>If an arc exceeds more than degrees metallic gas pipe shall not be back through the arc. A- 120° B- 30°
C- 3/
D- 0.
A- 1 - 1/2 inches (IMC - 307.2.3) - answer>>Contractors working with auxiliary drain pans, and a secondary drain system for an air conditioning system. How deep should be these auxiliary drain pans at least? A- 1 - 1/2 inches B- 1 - 1/4 inches C- 2 inches D- 1 - 3/4 inches B- open the valve slightly and close it immediately - answer>>What should be done before a regulator to a fuel gas cylinder valve is connected? A- tap the regulator with a wrench to loosen any dust and dirt on it B- open the valve slightly and close it immediately C- crack the seal with a metal rod D- open the valve quickly until the cracking sound is heard A- 18 inches (IFGC - 620.4) - answer>>Suspend a type unit heater shall be installed with clearances to combustible materials of not less than inches at the sides. A- 18 inches B- 24 inches C- 6 inches D- 12 inches D- sensing bulb - answer>>Volatile liquid is located in the and this is in contact with the evaporator of the refrigeration system.
A- bi-metal B- solid state C- cap tube D- sensing bulb A- 1 inch (IMC - TABLE 401.5) - answer>>What is the maximum opening in a grille protecting an intake on a commercial building? A- 1 inch B- 3/4 inch C- 1/4 inch D- 1/2 inch A- A (IFGC - 621.4) - answer>>Unvented fuel burning room heaters are not permitted in a group occupancy. A- A B- F C- S D- U C- low (IFGC - 202) - answer>>A drip is placed at what point in a system of piping to collect condensate. A- average B- mid C- low D- high A- at any point below grade (IFGC - 404.6) - answer>>Gas piping so I'm not penetrate building foundation walls.
