Question 3Refrigeration & AC - QMED
70% to passIf it is necessary to increase the operating head pressure of the refrigeration system using the device shown in the illustration, what should be done? Illustration GS-RA-14
A"4" should be rotated to compress the enclosed bellows
B"2" should be turned to relax the compression of the spring
C"2" should be turned to further compress the spring
D"4" should be rotated to relax the enclosed bellows
AI Explanation
The correct answer is C) "2" should be turned to further compress the spring. Turning "2" to further compress the spring will increase the operating head pressure of the refrigeration system. This is because the spring is responsible for maintaining the pressure in the system, and compressing it will raise the overall pressure. The other options are incorrect because rotating "4" to compress or relax the bellows would not directly affect the operating head pressure, and turning "2" to relax the spring would decrease the pressure rather than increase it.
Related Questions
Q@q.QuestionNumber:What is the physical state and pressure condition of refrigerant as it leaves a ... Q@q.QuestionNumber:At ambient temperature and atmospheric pressure, what is the status of R-134a? ... Q@q.QuestionNumber:What is the purpose of the pressure transducer as shown in the illustration? Ill... Q@q.QuestionNumber:A reciprocating refrigeration compressor may be tested for leaking discharge val... Q@q.QuestionNumber:A refrigeration compressor used in a multi-box refrigeration system is designed ...
Ready to test your knowledge?
Take a Refrigeration & AC - QMED Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App