Compressors - Study guides, Class notes & Summaries

COMPRESSORS UNIT 23 EXAM 1 QUESTIONS WITH COMPLETE SOLUTIONS Purpose of Economizer - Answer-Reduces flash gas by having a 2 stage pressure drop through float section Capacity control of centrifugal compressors - Answer-Speed control Butterfly damper Variable inlet vanes Compression factors that affect efficiency - Answer-piston/compressor displacement suction/discharge valves number of cylinders clearance pocket (size) Speed Suction/discharge pressures Types of refrigerant used...

COMPRESSORS, FANS AND BLOWERS TEST QUESTIONS WITH VERIFIED ANSWERS Multi-staging - Answer-is simply the compression of air or gas in two or more cylinders in place of a single cylinder compressor. It is used in reciprocating compressors when pressure of 300 kPa and above are desire, in order to: Save power Limit the gas discharge temperature Limit the pressure differential per cylinder Prevent vaporization of lubricating oil and to prevent its ignition if the temperature becomes to...

Fdny A35 Exam Questions and Answers 100% Pass What are air compressors used to power? -Answer-Industrial equipment and construction tools What pressure compressor require a certificate holder to operate? -Answer-100+ psi What are two examples of tools air compressors power? -Answer-Pneumatic wrenches and air lifts in automobile repair shops What are the 4 types of air compressors? -Answer-Reciprocating, centrifugal, rotary, and solar How can air compressors be powered? -Answer-Electric m...

This is the distance between the surface of the liquid level of a supply source located below a pump and the center line of the pump: Select one: a. total static head b. static discharge head c. static suction head d. static suction lift correct answers d The fact that different shaped containers, filled with liquid of the same height, have the same applied force by the liquid on the base of each container, is referred to as: Select one: a. Peterʼs Paradox b. Pascalʼs Paradox c. ...

100 lbs per square inch (psi) Correct Answer-Above how much compressed air pressure does a person need a permit? Reciprocating, centrifugal, rotary, and solar Correct Answer-Name four different types of air compressors Reciprocating air compressor Correct Answer-What is the most common form of air compressor? Electric motors, internal combustion engines, or steam turbines Correct Answer-What can air compressors be powered by? Compression of the flammable gas May lead to an explosion ...

HVAC BOMA 501 Study Guide Latest Update Graded A+ Dual Duct System A system in which hot air and cold air are supplied by separate ducts and mixed at each controlled space to provide the desired supply air temperature. This method consumes a great deal of energy. Muiltizone System an a/c system in which the zone control is obtained by mixing hot and cold air at the unit in response to a room thermostat Load Calulations take the sensible heat and the latent heat into consideration which o...

A-35 Air compressor COF Exam Questions And Answers A permit is required for any air compressor that compresses air at pressures above ___ pounds per square inch (psi). These permits are issued by the Bureau of Fire Prevention - ANS 100 The different types of air compressors are - ANS the reciprocating, centrifugal, rotary and solar compressors The most commonly used air compressor is the - ANS reciprocating air compressor The air compressors can be powered by - ANS elec...

Prime Movers and Engines/Pumps And Compressors/Heating Boilers – Q&A

Concerning protective trips on a compressor, what does LPCO stand for? - Answer-Low pressure cut out A type of compressor that uses two kidney bean shaped impellers to trap and transfer gasses is a/an: - Answer-Rotary Certain speeds of rotation that can cause severe vibration is called: - Answer-Critical speeds Which type of seal should be used in between stages of a compresser compressing a flammable or toxic gas? - Answer-Mechanical A type of pump seal that has one stationary part ...