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PE Exam Study 2026/ 2027 | NEWEST Versions |
100% Verified Questions and Answers | Exam
Prep
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Page 1 PE Exam Study.pdf
,PE Exam Study PE Exam Study 2026/02/22
Cooling Tower Range Twater-in - Twater-out
Cooling Tower Approach Twater-out - Tair-wb-in
Describes level of performance of cooling tower. Smaller
approach > more heat transfer > better at cooling
(typically ~10°F)
Greatest limiting factor of thermal WB Temp
performance for evaporative cooling
tower
Solve for Coil Efficiency EFF = 1 - Bypass Factor
How to solve for the Bypass Factor (Tdb,out - Tcoil)/(Tdb,in - Tcoil)
What is the apparatus dew point for a The overall coil temperature
coil
How is infinite variation over controller With modulating control (or proportional, proportional-
range accomplished? integration ie PI, or PID ie proportional-integral-
derivative action)
Page 2 PE Exam Study.pdf
,PE Exam Study PE Exam Study 2026/02/22
Refrigeration condensers are rated compressor work and net refrigeration effect
based on ability to reject total heat
from...
Equation for Qlat at standard Q = 4840CFMdel(Wlb)
Types of Chillers and Ranges Reciprocating 10-60
Scroll 10-400
Rotary Screw 70-500
Centrifugal 125-10,000
Convert from psig to psia psig + 14.7 = psia (14.7 is atmospheric)
What is the SG of water? Look on definitions, it is the density of the fluid divided by
density of water. So for water it is 1.
What does a reversing valve do? It is typically a four way valve between condenser
(indoor) and evaporator (outdoor) modes. It switches
between indoor (heating) and outdoor (cooling) coils.
Typically found in heat pumps
Page 3 PE Exam Study.pdf
, PE Exam Study PE Exam Study 2026/02/22
What is the Vapor Compression Cycle Evaporator > Low pressure, High Temp Gas > Compressor
(Win) > High Pressure, High Temp Gas >
Condenser > High Pressure, Low Temp Liquid > Expansion
Device > Low Pressure, Low Temp Liquid/Vapor >
Evaporator repeat
Why should you pitch the compressor To prevent oil from draining back into the compressor
discharge piping downward from the when it isn't operating. Oil should come from the return
compressor side not the discharge
What does the schedule number in pipe The ratio of service pressure to allowable stress
types refer to?
How is roughness in a pipe typically In feet
measured
When solving for the Net Positive The vapor pressure of the fluid at that temperature.
Suction Head Requirement, what is often
forgotten?
Page 4 PE Exam Study.pdf