carbon deposits on the compressor suction valves
the evaporator temperature to increase
rapid corrosion of the thermal expansion valve
no operating problems
第1题：
Excessive circulation of the lubricating oil with the refrigerant in a refrigeration system will cause______.
A.carbon deposits on the compressor suction valves
B.the evaporator temperature to increase
C.rapid corrosion of the thermal expansion valve
D.no operating problems
第2题：
insufficient lube oil circulating through the system
excessive circulation of lube oil through the system
insufficient refrigerant in the system
an overworked compressor
第3题：
If a used lube oil analysis indicates excessive chromate content, this means
A.air filtration is inadequate
B.engine coolant is leaking into the lube oil
C.fuel oil is leaking into the lube oil
D.the piston rings are excessive worn
第4题：
measuring
sounding rod
metering
weighting
第5题：
high TBN value
low oil floc point
low oil demulsibility
low oil neutralization number
第6题：
using a slightly dirty air filter
using oil having an excessive viscosity
intercooler or after-cooler leaks
carrying the oil level higher than normal
第7题：
provide a reservoir for cylinder lubrication
pump oil into the combustion space for cylinder cooling
prevent excessive lubricating oil consumption
allow hydraulic oil film formation on the cylinder
第8题：
In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .
A.all of the oil used by the engine through a filter
B.some of the oil used by the engine through a filter
C.some of the oil used by the engine through a centrifuge
D.all of the oil used by the engine through a centrifuge
第9题：
clogged lube oil piping
excessive valve-guide clearance
high lube oil viscosity
low lube oil temperature
第10题：
filter to remove the fuel oil
use the settler to remove the fuel oil
remove the fuel oil by centrifuging
drain and then renew the lube oil supply