MODERN REFRIGERATION AIR CHAPTER 16 REVIEW QUESTIONS AND ANSWERS
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Course
REFRIGERATION
Institution
REFRIGERATION
1. The type of circuit diagram that shows the approximate physical location of components in relation to each other is a ______ diagram.
a. Boolean
b. Ladder
c. Pictorial
d. Venn
2. The type of circuit diagram that shows the components and connections arranged in the order that they activate d...
MODERN REFRIGERATION AIR CHAPTER 16
REVIEW QUESTIONS AND ANSWERS | 100%
SOLVED
Chapter 16
1. The type of circuit diagram that shows the approximate physical location of components
in relation to each other is a ______ diagram.
a. Boolean
b. Ladder
c. Pictorial
d. Venn
2. The type of circuit diagram that shows the components and connections arranged in the
order that they activate during circuit operation is a ______ diagram.
a. Boolean
b. Ladder
c. Pictorial
d. Venn
3. Which of the following is not one of the three main components used in an HVACR
control system?
a. Controlled device
b. Controller
c. Operator
d. Sensor
4. Which device responds to changes in the signals from sensors and issues signals to
controlled devices?
a. Relay
b. Contractor
c. Thermocouple
d. Controller
5. In control systems, the desired condition is called the _______.
a. Control point
b. Cut-in
c. Offset
d. Set point
6. The term for the present condition in a conditioned space is the _____.
a. Control point
b. Cut-in
c. Offset
d. Set point
7. Sometimes called error, the deviation between set point and control point is the ______.
a. Differential
b. Cut-in
c. Offset
d. Range
, MODERN REFRIGERATION AIR CHAPTER 16
REVIEW QUESTIONS AND ANSWERS | 100%
SOLVED
8. The temperature or pressure value at which a device begins operation is its ______.
a. Cut-in
b. Cut-out
c. Differential
d. Range
9. The temperature or pressure value at which a device ceases operation is its _______.
a. Cut-in
b. Cut-out
c. Differential
d. Range
10. The set of numbers between and including a control system’s cut-in and cut-out values is
called the system’s _____.
a. Offset
b. Set point
c. Differential
d. Range
11. A control system’s _____ is the difference between the cut-out value and the cut-in value.
a. Adjustment
b. Average
c. Differential
d. Range
12. Which of the following statements about adjustment is true?
a. It increases a system’s differential
b. It decreases a system’s differential
c. It affects a system’s average temperature
d. It has no effect on how a system operates
13. Reducing a system’s cut-out temperature without changing its cut-in temperature is an
example of ______.
a. Differential adjustment
b. Range adjustment
c. Combination control
d. Actuator modulation
14. If a cooling system’s cut-in temperature I decreased, but its cut-out temperature stays the
same, which of the following is true?
a. The average temperature decreases
b. The average temperature increases
c. The system has a greater differential
d. The compressor will run for longer spans of time
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