FDNY A-35 QUESTIONS AND
CORRECT ANSWERS
Maintenance-Lubrication Oil ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-Make sure tight, frequently.
Never twist, bend, curl to stop it.
Do not patch w/ duct tape.
Maintenance-Belts ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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.
Maintenance-Operating Temperature ✅✅ANSW-Acceptable temp are in the maintenance
manual.
Overheating can cause damage to compressor and is a potential fire hazard.
If overheating discovered water cooling mechanism must be checked.
Lockout/Tagout Safety Procedures ✅✅ANSW-Lock the device or the power source w/ a hasp and
placing it in such a position that no hazardous power sources can be turned on. Also requires a tag to
be affixed to the lockout device indicating it should not be turned on.
Know OSHA Standard for Control of Hazardous Energy (Lockout/Tagout) procedure.
Compliance w/ Lockout/Tagout ✅✅ANSW-prevents 120 fatalities and 50,000 injuries each year.
CORRECT ANSWERS
Maintenance-Lubrication Oil ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-Make sure tight, frequently.
Never twist, bend, curl to stop it.
Do not patch w/ duct tape.
Maintenance-Belts ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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 ✅✅ANSW-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.
Maintenance-Operating Temperature ✅✅ANSW-Acceptable temp are in the maintenance
manual.
Overheating can cause damage to compressor and is a potential fire hazard.
If overheating discovered water cooling mechanism must be checked.
Lockout/Tagout Safety Procedures ✅✅ANSW-Lock the device or the power source w/ a hasp and
placing it in such a position that no hazardous power sources can be turned on. Also requires a tag to
be affixed to the lockout device indicating it should not be turned on.
Know OSHA Standard for Control of Hazardous Energy (Lockout/Tagout) procedure.
Compliance w/ Lockout/Tagout ✅✅ANSW-prevents 120 fatalities and 50,000 injuries each year.
