HVAC Exam 1 With All Correct & 100% Verified
Answers| Latest Version| Already Graded A+
Matter exists in what three forms? ✔Correct Answer-solid, liquid, gas
What is temperature measured by? Quantity or intensity ✔Correct Answer-Intensity
Define British thermal unit (Btu) ✔Correct Answer-Measure of heat energy - amount of energy
needed to raise 1 lb of water 1 degree F
How much heat is required to raise the temp of 100 lb or water from 70F to 120F ✔Correct
Answer-Q=1000lb*(1btu / change of temp)
so 1000*(1/ 50) = 50,000
If 750 Btu is supplied to 15lb of water at 72F what will be the resulting temperature? ✔Correct
Answer-
1 Btu raises air ✔Correct Answer-4.75F
To melt 1lb of ice you need ✔Correct Answer-144 Btu
So to melt 2000 lbs of ice or 1 ton you need ✔Correct Answer-288,000 Btu
What is 1 ton of refrigeration? ✔Correct Answer-288,000 Btu / 24 hrs = 12,000 Btu/Hr
What is the hottest water can get? ✔Correct Answer-212F
1 Btu raises 1 lb of water ✔Correct Answer-1 degree F
If 750 Btu is supplied to 15 lb. of water at 72F, what will be the resulting temperature? ✔Correct
Answer-750/15=50F
50F + 72F = 122F
Latent heat cannot be measured on a thermometer. True or false? ✔Correct Answer-True - only
sensible heat can be recorded- latent heat is a change in mass EX) vaporization, condensation, fusion,
melting
How much heat needs to be removed to drop the temperature of 1000 cfm of air from 70F to 55F.
✔Correct Answer-Q= 1.08*CFM*Change in Temp
CFM cubic feet/min
make sure it is given to you in CFM or convert it from seconds to min or hours to min
The heat that changes the temperature of a substance is called ✔Correct Answer-Sensible heat
The heat that changes the state of a substance is called ✔Correct Answer-Latent heat
The heat that changes a liquid to a vapor is called the heat of ✔Correct Answer-Vaporization
Answers| Latest Version| Already Graded A+
Matter exists in what three forms? ✔Correct Answer-solid, liquid, gas
What is temperature measured by? Quantity or intensity ✔Correct Answer-Intensity
Define British thermal unit (Btu) ✔Correct Answer-Measure of heat energy - amount of energy
needed to raise 1 lb of water 1 degree F
How much heat is required to raise the temp of 100 lb or water from 70F to 120F ✔Correct
Answer-Q=1000lb*(1btu / change of temp)
so 1000*(1/ 50) = 50,000
If 750 Btu is supplied to 15lb of water at 72F what will be the resulting temperature? ✔Correct
Answer-
1 Btu raises air ✔Correct Answer-4.75F
To melt 1lb of ice you need ✔Correct Answer-144 Btu
So to melt 2000 lbs of ice or 1 ton you need ✔Correct Answer-288,000 Btu
What is 1 ton of refrigeration? ✔Correct Answer-288,000 Btu / 24 hrs = 12,000 Btu/Hr
What is the hottest water can get? ✔Correct Answer-212F
1 Btu raises 1 lb of water ✔Correct Answer-1 degree F
If 750 Btu is supplied to 15 lb. of water at 72F, what will be the resulting temperature? ✔Correct
Answer-750/15=50F
50F + 72F = 122F
Latent heat cannot be measured on a thermometer. True or false? ✔Correct Answer-True - only
sensible heat can be recorded- latent heat is a change in mass EX) vaporization, condensation, fusion,
melting
How much heat needs to be removed to drop the temperature of 1000 cfm of air from 70F to 55F.
✔Correct Answer-Q= 1.08*CFM*Change in Temp
CFM cubic feet/min
make sure it is given to you in CFM or convert it from seconds to min or hours to min
The heat that changes the temperature of a substance is called ✔Correct Answer-Sensible heat
The heat that changes the state of a substance is called ✔Correct Answer-Latent heat
The heat that changes a liquid to a vapor is called the heat of ✔Correct Answer-Vaporization
