FDNY Z-51- Refrigeration Engineer TEST Q&A
FDNY Z-51- Refrigeration Engineer TEST Q&A 1. which of the following are reference document commonly used by ref engineers in us - ANSWER national fire protection 2. water and moisture is a serious problem in a refrigeration system water can be kept out of the system. - ANSWER proper evacuation after charging the system 3. the pressure drop through the condenser is directly proportional to the square of the water velocity. at the flow rate the condenser water pressure drop is 40 psi. if the condenser water velocity is reduced by one-half the condenser pressure drop, in psi, would be nearly - ANSWER 10 4. a tech has been asked to estimate the cost of operating a 5 HP motor. becuz the plant is billed energy consumed as kilowatts-hrs, the tech will have to calculate the conversion. the equivalent engery of 5 hp motor operating for 9 hrs in kilowatt-hr is closest to? - ANSWER 33.6 5. which of the following best describes how a cylinder unloader works ? - ANSWER controlling the clearance volume in the compressor with a solenoid 6. at 14.7 psi, mercury barometric column is 29.92 in high, what is the atmospheric pressure when the barometer shows a column height of 26in - ANSWER 13.65 7. of the following, major advantages of a shell and tube condenser over a shell and coil condenser is ? - ANSWER there is less danger of developing leaks
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- FDNY Z-51
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- September 25, 2023
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fdny z 51 refrigeration engineer test qa
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