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108 TRG-TRC016-EN
Questions for Period 1
1 What are the four types of compressors commonly used in vapor-
compression water chillers?
2 List one advantage of an air-cooled chiller and one advantage of a
water-cooled chiller.
3 True or False: The IPLV equation included in the ARI standards for rating
chillers was derived to provide a representation of the average part-load
efficiency for a system with multiple chillers.
Questions for Period 2
4 What are the three most common methods of load-terminal (coil) control?
5 The system shown in Figure 117 contains two chillers piped in parallel with
a single, constant-volume pump. What is the drawback of this system
configuration when only one chiller is operating?
6 In a conventional primary-secondary chilled-water system, each production
pump delivers a __________ (constant or variable) flow of water and the
distribution pump delivers a __________ (constant or variable) flow of water.
7 What method of load-terminal control should be used in the distribution
loop of a primary-secondary chilled-water system?
8 Deficit flow in the bypass pipe of a primary-secondary system is an
indication to turn an additional chiller __________ (on or off).
Figure 117
Quiz