Hydronic Heating and Cooling Pretest Po Questions with CORRECT Answers (Grade A+)

Hydronic Heating and Cooling Pretest Po Questions with
CORRECT Answers (Grade A+)

Question 1:
T/F Forced-air systems cost less than hydronic systems to operate and maintain because of the
durability and long life of the equipment
Answer:
False

Question 2:
T/F Far less water than air is needed to distribute the same amount of heat, meaning that hydronic water
distribution can use piping that is much smaller than the equivalent air ductwork.
Answer:
True

Question 3:
T/F For practical purposes, enthalpy may be taken as the sum of sensible heat and latent heat.
Answer:
True

Question 4:
T/F Heat transfer is the flow of heat from one object or substance to another, and it occurs because of a
difference in pressure.
Answer:
False

Question 5:
T/F Single-wall heat exchangers are less efficient than double-wall heat exchangers of equal size.
Answer:
False

, Question 6:
T/F The compressor pumps the vaporized refrigerant away from the evaporator and discharges it at a
higher pressure and temperature into the condenser.
Answer:
True

Question 7:
T/F A dry cooling tower is a cooling tower with open water loops, allowing direct contact between
circulating water and outside air.
Answer:
False

Question 8:
T/F Rotary pumps discharge fluids in an erratic, pulsating flow.
Answer:
False

Question 9:
T/F The two most commonly used centrifugal pump sealing methods are the stuffing box seal and the
mechanical seal.
Answer:
True

Question 10:
T/F There are four basic classifications of pumps.
Answer:
False

Question 11:
T/F In air control management systems, manual air vents are recommended to be installed at terminal
units and high piping points.
Answer:
True