Compressor lubrication may be divided into two main sections _______ lubrication and ________ lubrication 1. Peripheral 2. Internal 3. Splash 4. External 5. Pressure
1,2
3,5
2,3,4
2,4
A double acting reciprocating compressor:
Receives and compresses air at the head end of the cylinder
Receives and discharges air at both ends of the cylinder
Increases the pressure twice from the inlet valve
Has one compression stroke for every crankshaft revolution
Must have at least two pistons
Two pre-filters are installed on a package industrial screw compressor. They are installed at the inlet of the:
Water/oil seperator
Air dryer
After filter
Air fluid seperator
Moisture seperator
Reciprocating Compressor valves are usually automatic and open and close by:
Action of a poppet valve
Movement of the piston covering or uncovering ports
Operation of an air solenoid valve
A pressure difference
A camshaft
The axial flow compressor's basic operating principle is similar to a:
Centrifugal compressor
Reciprocating compressor
Reaction turbine in reverse
Reaction turbine
Rotary compressor
The compression Ratio is the ratio of:
Absolute discharge pressure to absolute inlet pressure
Gauge discharge pressure to gauge inlet pressure
The free air intake to the absolute volumetric discharge
The gauge inlet pressure to the absolute discharge pressure
Piston diameter to piston stroke
In a packaged screw compressor package, the bulk of the moisture is removed in the moisture separator in order to decrease the load in the:
Air/fluid seperator
Pre-filter
Water/Oil seperator
The prime purpose of water-cooling or air cooling an air compressors cylinder is to:
Cool the air
Reduce moisture and volume of the air
Keep the cylinder at a reasonable temperature
Prevent fire from occurring in the receiver
Prevent operator injury
An important advantage of a sliding vane compressor is that it:
Does not require internal lubrication
Has a high starting torque
Does not require inlet or discharge valves
Requires light nylon timing gears
Does not require a prime mover
An air filter on an air compressor inlet pipe is used to:
Reduce the air velocity
Keep out the moisture
Purify the air by removing exhaust process gases
Prevent dust and other particulate from entering the compressor
Increase the air velocity
