Chapter 6 Cooling Production Equipment and Systems
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
1) Methods for producing cooling include the following:
A. ________
B. ________
C. ________
D. ________
1)
_____________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
2) For a given fluid, what’s the relationship between boiling point and pressure? 2) _______
A) The higher the pressure, the higher the boiling point.
B) The boiling point is the same regardless of pressure.
C) The lower the pressure, the higher the boiling point.
3) Which list states the correct order of equipment for the vapor compression cycle? 3) _______
A) Condenser, then compressor, then evaporator, then expansion valve.
B) Expansion valve, then evaporator, then compressor, then condenser.
C) Compressor, then expansion valve, then evaporator, then, condenser.
4) Suction gas temperature is most likely which in the list below? 4) _______
A) 120°F B) 85°F C) 95°F D) 45°F E) 55°F
5) Liquid line temperature is most likely which in the list below? 5) _______
A) 55°F B) 45°F C) 95°F D) 120°F E) 85°F
6) Cooling tower supply temperature is most likely which in the list below? 6) _______
A) 85°F B) 45°F C) 120°F D) 55°F E) 95°F
7) At 5-7 mm Hg vacuum, water boils at what temperature? 7) _______
A) 50°F B) 40°F C) 80°F
8) Which list states the correct order of components for the absorption refrigeration? 8) _______
A) Evaporator, then absorber, then concentrator, then condenser.
B) Absorber, then condenser, then evaporator, then concentrator.
C) Condenser, then absorber, then concentrator, then evaporator.
9) Carnot cycle refrigeration efficiency improves under which of the following conditions? Select
all that apply.
9) _______
A) Condenser temperature is lower. B) Evaporator temperature is higher.
C) Condenser temperature is higher. D) Evaporator temperature is lower.
10) In the US Midwest, the most popular way of using evaporative cooling for comfort applications
is which of the following?
10)
______
A) Water-side economizer.
B) Direct evaporative cooling.
C) Indirect evaporative cooling.
11) Which of the following statements is true of desiccant cooling? Select all that apply. 11)
______
A) Must be used in combination with another system to provide cooling.
B) Uses heat to regenerate desiccant.
C) Cooling effect consists primarily of dehumidification.
D) Can be used for comfort cooling in dry climates.
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
12) Match these refrigerants (insert number) with their properties listed below.
(1) R-12
(2) R -134A
(3) R-410A
(4) R-717
A. ________ Environmentally friendly, but flammable and toxic.
B. ________ Banned by Montreal Protocol due to high ODP.
C. ________ On its way out due to high GWP.
D. ________ Was a replacement for R-22.
12)
_____________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
13) Which of the following statements are true regarding DX systems? Select all that apply. 13)
______
A) They always have the compressor(s) in the fan coil unit.
B) They include rooftop units and PTAC units.
C) They generally use water-cooled condensers.
D) They can have condensers remote from the fan coil unit.
