In a refrigeration system, foaming of the crankcase oil may cause the ().
- Aexpansion valve to overfeed
- Bcompressor to knock
- Cwater regulating valve to fail
- Dcrankcase drains to plug
In a refrigeration system, foaming of the crankcase oil may cause the ().
1、Dirt in a fuel oil system of a diesel
Dirt in a fuel oil system of a diesel engine can cause ()Adamage to strainersBover-speeding of the engineCexcessive cooling of the engineDinjector damage
2、Sweating of the refrigeration system c
Sweating of the refrigeration system compressor crankcase is caused by ().Atoo much superheatBinsufficient superheatCsuction pressure too lowDexcessive refrigerant returning to the compressor
3、Dirt in the fuel oil system of a diese
Dirt in the fuel oil system of a diesel engine can cause ().Aclogged filtersBpoor combustionCoverloading of the dieselDshock of fuel line
4、Foaming of the oil in a refrigeration
Foaming of the oil in a refrigeration compressor crankcase is caused by ().Arefrigerant boiling out of solution from the lube oilBliquid refri...
5、In a refrigeration system, if the cool
In a refrigeration system, if the cooling water to the condenser fails, the().Abox temperature solenoid valve will closeBexpansion valve will closeCcompressor will shutdownDking valve will ope
6、In a tree directory of a file system,
In a tree directory of a file system, relative path name can be used to find files for improving directory retrieval.To do this, which directory of the followings should be set up?Aparent directoryBchild directoryCworking directoryDhome directory