Penalty Yardage
Sensible heat can be described as
Heat required to bring about a change of measurable temperature
What are the 3 parts of the flame on the oxygen/acetylene torch?
Inner cone, Outter cone, Tail
What is the 4th step in the sequence of operations for a 90% furnace?
HSI is energized
Flame Rod
A small diameter stainless steel rod on a gas furnace used to sense flame rectification by being placed in the flame
What size should the return air duct be?
As a big or bigger
Latent Heat can be described as:
Heat required to bring about a change of state
Oxygen/acetylene equipment has two hoses: the oxygen hose is ______ and the acetylene hose is_____. (what colors)
Green, Red
What is the 7th step in the sequence of operations of a 90% furnace?
Indoor Blower motor starts
Manometer
A pressure measuring tool that can measure low pressure in inches of water column
A high efficiency gas furnace will not stay in operation. The unit runs for approximately 5 minutes and then shuts down by the main furnace controller. What is the first thing to check?
Air Filter or Air flow
Specific heat can be described as:
The amount of heat required to change 1 pound of matter 1 degree F
The oxygen side regulator should be adjust to what PSI?
20 PSI
What is the first step in the sequence of operations of an Oil Furnace
Call for heat
Sensible Heat
Heat that can be measured by a thermometer.
Your servicing a 90% furnace that doesn't have properly sized duct work (the ductwork is sized too small) What are possible longer-term problems to having an improperly sized duct.
lower heat exchanger life. Prone to cracking more easily.
The freezing point of water is zero degrees using what scale?
Celsius
How far should the oxygen tank be opened?
Fully
What is the 3rd step in the sequence of operation of a 90% furnace
Pressure switch closes
Primary Air
Air drawn into the gas burner to mix with air. As the air fuel mixture comes out of the burner, secondary air is added from the surrounding air and is ignited
What blower speed is most commonly used for the heating mode on a furnace with a multi speed motor?
Low
DAILY DOUBLE
What are the temperature scales that are used? (Name 4)
Fahrenheit, Rankin, Celsius, Kelvin
How far should the acetylene tank valve be opened?
1/4 turn
How many BTUs are required to change 3 pounds of ice at 30 degrees to 3 pounds of water at 212?
975 BTU/H
Intermittent Pilot
A pilot burner that only operates when there is a call for heat
How many BTUs are required to change 1 pound of ice at zero degrees to 1 pound of steam at 220?
1314 BTU/H