Compressor Cylinder Components Flashcards
T or F
Rod reversal refers to the movement of the crosshead pin under alternating forces of compression and tension
True
T or F
Piston speed is constant while travelling from BDC to TDC
False, it depends on the angle of crank throw
T or F
on a large, two-stage, double acting compressor, it is most likely that the first stage piston is made of aluminum, while the second stage piston is made of cast iron to help balance, the reciprocating weight
True
decreasing suction pressure results in ____________ compressor rod loading
increasing
T or F
The proper way to set clearance between the piston and the cylinder head is to have 2/3 on the head end and 1/3 of the total clearance left on the crank end
True
what happens if the surface on the piston rod is scratched or damaged?
It won’t seal properly
what is the purpose of properly setting the piston to head clearances?
To make sure that the piston doesn’t hit the head while running
T or F
inlet cooling water temperature should be slightly warmer than the inlet gas temperature
true
T or F
when a cylinder is Hydro tested after overhaul, the test pressure used is 1 1/2 times normal operating pressure
True
what are two types of cylinder liners?
Wet
Dry
A honed surface on a cylinder surface promotes what two things?
lubrication
sealing
T or F
The top of the cylinder is the best location for the cooling water inlet to keep the cylinder full of coolant
false, the bottom is
T or F
clearance pockets are used primarily to control pressure
false, they control output
List the four different ways that a compressor packing must be able to move in order to work efficiently
axially
Rotationally
Expand/contract
Laterally
T or F
The markings on the oil wiper rings must face the cylinder side for proper installation
False, they must face the crank end
