Fdny A35 Exam Questions and Answers Verified 100% Correct

Fdny A35 Exam Questions and Answers Verified 100% Correct Maintenance & Repairing Compressor- General Requirements - ANSWER - always follow guidelines outlined by manufacturer. Repair: -always turned off -electrical supply shutdown -air drained -made by qualified technician Repairs by CF - ANSWER --must know how to correct cooling system; -may replace belts -change air filter -change lubrication oil Leaks - ANSWER -CF must look & listen for leaks. More prominent in colder months when sealing materials shrink. Most leakage occurs at tubing and fittings at air reciever tank. Heat & Compressor - ANSWER --never place combustible materials nearby; -do not use near devices that produce heat; solar heat is not known to cause overheating CF Responsibility - ANSWER --visually inspect -remain in area for a few minutes after compressor started -do not operate at speeds above recommended ranged Injury from Compressor - ANSWER --Dust or debris blow off clothing can be driven under skin causing DEATH -Eardrum ruptures at 40 PSI -Air entering mouth can destroy lungs and internal organs -Eyesight (always wear googles) Hydrostatic testing - ANSWER -Fire Code no longer requires affidavit indicating reciever is hydrostactically tested and defect free. HOWEVER, test every 5 years at a minimum is reccomended. Cleaning Compressor - ANSWER -only using soap and water solution. NEVER use benzene, kerosene or other light oils for this purpose. They may cause an explosion when mixed w/ air under pressure. Both oil and water can cause an explosion if they actually enter the compressor tank. Maintenance-Cooling System - ANSWER -Tested every 6 months. Water supply control valves always open when compressor in operation Maintenance-Air Intake Filter - ANSWER -Inspected/cleaned weekly. Replaced every 6 months. Replace if damaged Maintenance-Lubrication Oil - ANSWER -Level checked weekly using dipstick Replaced every 6 months Refer to manufacturer manual for safe operating temperatures of oil and grade of oil needed. Maintenance-Automatic Low level Oil Indicator Switch - ANSWER -Tested every 3 months by manually draining oil from compressor. Do not run compressor for a long period of time when testing this way. Maintenance-Air Reciever - ANSWER -Tested every 5 years by qualified technician Water buildup in moisture separator assembly and air receiver drained daily by opening drain valve EXCEPT when temperature below 40 degrees Safety valves should be manually operated every week. Maintenance-Hose Connections - ANSWER -Make sure tight, frequently. Never twist, bend, curl to stop it. Do not patch w/ duct tape. Maintenance-Belts - ANSWER -Turn off compressor and disconnect power supply. If visibly damaged or frayed, replace. To test tension, firmly press on belt. If it moves more than 1 inch, fly wheel needs to be adjusted. If this doesn't work replace belts. Maintenance-Electrical Connections - ANSWER -Visually inspect. Notify electrician if evidence of defective parts. Special attention to motor starter (protects agst. thermal overload caused by excessive currents). Maintenance-Pressure Switch - ANSWER -1. Star compressor, allow air in receiver to build to normal operating levels while paying attention to gauge. 2. When gauge indicates pressure above normal, compressor should shut down automatically. If not, pressures witch may be adjusted. If this doesn't work switch is defective and MUST be replaced. **SOME compressors operate continuously as their pressure switch device just prevents compressor from compressing air. to test this just make sure air is no longer compressing when level is reached. Maintenance-Pressure Relief Valve - ANSWER -Run compressor w/ pressure switch fully open (when it is in this position it CANNOT shut down the compressor). Should be set at NO LESS than 15 psi OR 10% above the operating pressure of the compressor (which ever is greater) BUT NEVER higher than max allowabe working pressure of receiver.