证券公司承销证券时，如果未对公开发行募集文件进行核查而导致投资者在证券交易中遭受损失的，作为

Excessive oil foaming in the crankcase of a refrigeration compressor can result in _____.

A.overheated compressor bearings

B.excess lube oil viscosity

C.carbon deposits on the compressor piston rings

D.wax crystals forming in the lubricant

In a refrigeration system, foaming of the crankcase oil may cause the _____.

A.expansion valve to overfeed

B.compressor to knock

C.water regulating valve to fail

D.crankcase drains to plug

Foaming of the oil in a refrigeration compressor crankcase is caused by _____.

A.refrigerant boiling out of solution from the lube oil

B.liquid refrigerant flooding the compressor and system

C.lube oil viscosity being reduced by refrigerant dilution

D.compressor suction pressure suddenly increasing

A.compressor damage from improper lubrication

B.refrigerant absorption by the lubricant

C.increased viscosity in the lubricant

D.carbon deposit on the compressor suction valves

A.cause a loss of the liquid seal

B.create a vapor lock in the liquid receiver

C.collect in the condenser

D.cause foaming of the oil in the crankcase

Crankcase explosions in propulsion diesel engines result from ____.

A.the splashing of lubrication oil by the crankshaft

B.the dilution of crankcase oil with particles of combustion

C.broken fuel lines spraying oil on the crankcase

D.the ignition of unburned fuel and air in the crankcase

Crankcase explosions in propulsion diesel result from_____.

A.the splashing of lubrication oil by the crankshaft

B.the dilution of crankcase oil with particles of combustion

C.broken fuel lines spraying oil on the crankcase

D.the ignition of unburned fuel and air in the crankcase

Crankcase explosions in propulsion diesel engines result from

A.the splashing of lubrication oil by the crankshaft

B.the dilution of crankcase oil with particles of combustion

C.broken fuel lines spraying oil on the crankcase

D.the ignition of unburned fuel and air in the crankcase

A condition that can increase the foaming tendency of lube oil is ______.

A.excessively high oil temperatures

B.water or moisture contamination

C.fuel dilution

D.life its cylinder relief vales