Home
Practice
Exam Simulator
Study Plan
Flash Card
FAQ
Blog
Can you use an ohmmeter to check the resistance in variable-speed motor windings?
Explore more HVAC questions
Visit our
website
for other HVAC topics now!
Related questions
What devices that will shut burner down in case the burner doesn't fire
What two factors determine the size of a run capacitor?
The air that is discharged from the Sullair compressor potentially has moisture content in it. How is this moisture removed?
Power factor
When testing the resistance of the windings of any motor to ground, what should you do if you obtain a measurable ohmmeter reading?
DX
What causes the windings to heat up in a normally operating ac motor?
Halogens
What is the function of the incore thermocouple system?
Capacitor-start motors are used in applications that require a relatively high _____ load, but a relatively low _____ Load.
Molecule
Current
when is a line voltage thermostat used
In a single-stage fuel oil pump, the oil is fed to the burner by capillary action.
What is insulated with ceramic to prevent electrical ground
What is the primary function of MIDS?
The ______________________ is the "source" tank for Drain Channel
BTU
Element
FPB
What happens when thermal-acting bi-metal contacts are heated?
What does a heat anticipator do
Does a start capacitor increase or decrease starting current?
When you must replace a motor rated at 1/4 hp or less, is it more accurate to match horsepower or current draw?
Dew Point
Does a run capacitor increase or decrease current draw?
Recovery/recycling equipment must have shutoff valves located within 12 in of the hose's service ends so that:
What is the function of the centrifugal switch attached to the shaft of a split-phase motor?
Design equivalent temperature difference (DETD)
2 techs are discussing an AC system retrofit. Tech A says that a high pressure cutout switch must be added. Tech B says the receiver drier should be replaced. Who is right?
When converting the ac system in an older vehicle to R134a what percentage of the original R12 charge amount should be used?
During an AC system test the high side pressure was found to be excessive and the compressor continued to run. Tech A says the high pressure cut out switch could be defective. Tech B says there can be an air flow obstruction at the condenser. Who is right?
List the areas that the Reactor Coolant Drain Tank Subsystem collects drainage from.
Tech A says that evacuating an AC system will remove air and moisture from the system. Tech B says evacuating an AC system removes dirt particles. Who is right?
Neutron
Refrigerant
A customer complains that when accelerating his car with the ac on the cold air flow from the dash outlets shifts to the floor. Tech A says that this is caused by a faulty check valve in the vacuum reservoir. Tech B says this condition is due to a vacuum leak. Who is correct ?
British thermal unit (Btu)
VAV
Tech A says the pressure cycle switch is located on the accumulator. Tech be says there must be an evac/recharge done before removing this switch. Who is right?
Nucleus
Enthalpy
An auxiliary tank and booster pump system is required if the oil supply is ____ below the oil burner pump.
HW
Which effluent radiation monitor will isolate the liquid waste discharge valve should there be high radiation detected in the effluent sample stream being discharged?
