Presented by Little Giant Ladders
Compete in a 5-minute digital challenge with questions provided by NATE once a day from Wednesday, June 15th through Sunday, July 31st, 2022.
Participants with the most correct answers will qualify to move on to Round 2 and compete for their chance at a trip to the finals in Tampa, FL. Ties will be determined by the least number of incorrect answers. When taking the test, the result from your first quiz attempt will count toward your entry for that day.
Will you be our first ever ServiceTitan HVAC National Champion?
The grade of fuel used in residential and light commercial heating units is:
A condensing oil furnace operates at a higher efficiency because part of the heat output is:
The number engraved on the nozzle indicates:
The CAD cell is a safety device that uses which of the following to prove ignition?
If there is too much primary air, the gas flame can:
The process of ice making usually occurs in which temperature range?
An air-cooled R-12 refrigeration system is operating normally with a suction pressure of 25 psig and a head pressure of 136 psig. Which of the following represents a possible set of operating pressures if the condenser fan motor burns out?
The amount of heat required to raise one pound of water, one degree Fahrenheit?
How many BTUs in a gallon of #2 fuel oil? (For calculation purposes)?
The orifice is a precisely sized hole in the:
A forced draft medium temperature evaporator would:
A forced draft high temperature evaporator would:
A typical evaporator operating temperature in an air-conditioning system is:
If the application requires a coil design to operate below 32°F, there must be provision for:
The heat required for off-cycle defrost is obtained from:
A direct expansion-type evaporator is also called a:
A typical superheat for an evaporator operating under normal conditions would be:
An air-cooled condenser that is operating in a climate that has four distinct seasons must:
Mineral deposits in the water portion of a water-cooled condenser act as:
If the waterflow is reduced, the temperature difference across a condenser will:
In a water-cooled condenser, a regulating valve is used to control the:
The screw-type compressor is used primarily in:
Which of the following terminal combinations would show an open circuit if the internal overload device in a hermetic compressor should open due to excessive heat?
The purpose of an externally equalized thermostatic expansion valve is to:
Balanced port TX valves are used to ____.
How does the receiver ensure that only 100% liquid refrigerant enters the liquid line?
As the adjusting spring on an evaporator pressure regulator is tightened, the pressure in the evaporator will:
The stack switch or stack relay:
To protect the compressor during periods of hot pull down, a(n) ____ valve is used.
Which of the following is a type of low ambient temperature head pressure control?
Defrost using internal heat is accomplished using:
The best way to adjust a CPR valve is by:
The refrigerated cabinet temperature of a high-temperature refrigeration unit ranges from:
Medium-temperature refrigerated cabinet temperatures range from:
In a wastewater cooled system, the difference between the condensing temperature of the refrigerant and the leaving water temperature is approximately:
The refrigerant charge in a domestic refrigerator is usually expressed in:
What two functions does the evaporator of a domestic refrigerator perform?
The temperature of the fresh food compartment of a domestic refrigerator is:
Improper combustion can lead to:
What is the volume of a rectangular space that has a length of 10', a width of 30', and a height of 10'?
What is the area of a rectangular flat surface that has a length of 10' and a height of 20'?
Warm air rising from a heat source is an example of what?
A fire extinguisher with a "B" classification will handle what kind of fire?
What are tubing benders used to bend?
What is the appropriate way to remove pin rivets (pop rivets)?
How can a technician prevent someone from turning on the power while they are working on a unit?
A technician notices an extension cord is missing a ground prong. What should the technician do?
What should be worn when working around airborne particles or caustic chemicals?
When accessing an attic without a platform, what should a technician walk on?
When servicing an electrical system where the use of a ladder is required, which type of ladder should be used?
Which of the following is an effective method for reducing the sound transmissions from an air handler installed in a closet?
What is a property of using an oxy-acetylene compared to an air-acetylene system?
The manufacturer's instruction sheet specifies 0.5 ounces of refrigerant to be added for each added foot of refrigerant line length. How much refrigerant must be added to the system for 10 additional feet of line set?
When locating flexible duct in a crawlspace, the duct should be:
What is a supply plenum?
Which of the following statements is true of a recovery machine?
What steps are necessary to clean a stacked condenser coil?
What is the effect on supply airflow when the size of the return duct is decreased?
What must be prevented when bending soft copper tubing?
What is one reason for using a brazing alloy rather than soft solder when joining copper to copper?
What is the primary reason the oil must be changed often in a vacuum pump?
What is a digital manifold gauge set useful for?
What is the primary difference between a grille and a register?
What will be the effect of a "cross break" made on all sides of any rectangular section of metal?
Where are drive cleats typically installed on rectangular duct?
Where must the secondary condensate drain of an attic mounted horizontal air handler used with a heat pump be connected?
Which of the following is a likely problem if a heat pump has a high indoor temperature rise?
What is one instrument required for an accurate deep evacuation procedure?
What happens to heat pump capacity as outdoor temperature decreases?
When using acetylene, 15 psig is:
A loose fan belt will:
The 'R' value indicates the ability of insulation to do what?
What is the purpose of a nitrogen purge when brazing piping?
What could be caused by dirty condenser coils?
Why should oxygen NOT be used as a purging gas?
Which of the following is an advantage of an infrared thermometer?
What should a technician do after inserting two drives to connect two sections of duct together?
Which safety feature could prevent the operation of a gas furnace?
Why are humidifiers used with heating systems?
What is the purpose of using flux when soldering?
Which of the following would cause a heat pump system to short cycle?
What can a dirty or clogged air filter in an operating air conditioning system cause?
What is the primary purpose for using turning vanes in a rectangular elbow?
What is a duct transition?
What is a critical step when installing the gauges on a unit?
What is a device used to charge a system with a specified number of ounces of refrigerant?
When the adjustment handle on a manual damper lies parallel to the airflow path of the ductwork, which of the following statements is true?
What should an installer do when reconnecting sections of round metal duct?
Which of the following is the correct method for cleaning an air distribution blower wheel?
Which of the following would be the appropriate tool to remove a threaded bolt with a ⅜" hex head?
Which of the following is the proper tool to mark a piece of sheet metal for drilling a pilot hole?
What tool is specifically made to thread a hole in metal?
What is the plate at the bottom of a wall to which the studs are attached called?
What is an exposed central support that runs parallel to the ceiling called?
How many inches is the on-center spacing of 2 x 4 load bearing wall studs used in residential construction?
What is the addition or removal of heat without a change in temperature known as?
What is the process of heat transfer by which gases and liquids move due to changes in temperature and/or pressure called?
What does the term 'continuity' indicate?
Which of the following is the recommended tool for cutting the opening in a metal cabinet?
Which of the following would be used to convey hazardous materials and treatment information to a technician?
When two objects (A and B) are in direct contact with each other, heat will flow from A to B if:
What do ceiling joists typically rest directly on?
Why should hacksaws never be used to cut copper tubing?
What is a reamer blade mounted on a tubing cutter used for?
What is oxidation?
When flaring copper tubing with too much starting height, the flare will:
What is the amount of heat that must be added to one pound of water to raise its temperature 1°F is called?
What is a Ground Fault Circuit Interrupter (GFCI)?
Which of the following is true of a DC circuit?
What is one effect of tighter home and building construction?
Whenever nitrogen is used for purging the technician must always be certain:
What happens when air moves too quickly through a filter?
Which of the following is an electrical load?
What can an undersized electrical conductor under load result in?
What can short cycling an A/C system result in?
What is a common cause of noise complaints?
What should be done prior to connecting the line voltage wiring to an indoor air handler or furnace?
Which of the following requires the use of flux with a silver brazing alloy?
What do the gauges on oxy-acetylene torch regulators display?
What can be caused by a loose line voltage connection?
A loose control voltage connection can cause which of the following problems?
What effect will slowing the evaporator fan have on moisture removal?
How many feet above a flat roof must a ladder extend when used to access the roof
Refrigerant vapors in high concentrations should not be inhaled as they:
What is power measured in?
What is electrical current measured in?
What can cause sweating windows and mildew on walls and furniture?
What will the voltage across a switch be when the contacts are closed?
What tool should be used to remove a sweat type filter-drier from a system?
Moisture within a structure flows from:
After a vacuum pump has been used, what does a continuous pressure rise in the system most likely indicate?
To capture moisture in a refrigerant system use a manufacturer's recommended: