In an air conditioning system, low head pressure associated with a reciprocating compressor can be the result of ()
- Abroken valve springs
- Btight drive belts
- Chigh line voltage
- Dair in the system
In an air conditioning system, low head pressure associated with a reciprocating compressor can be the result of ()
1、With ducted air conditioning systems,
With ducted air conditioning systems, the modern tendency is to use()Acentral air conditioning systemBhigh velocity systemClow velocity systemDsingle duct system
2、In an engine with air inlet valve and
In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder () and the gases exh...
3、The air spaces in the floor of an infl
The air spaces in the floor of an inflatable liferaft will provide protection against().Aasphyxiation from CO2Bloss of air in the sides of the raftCrough seasDcold water temperature
4、An increase in the air inlet manifold
An increase in the air inlet manifold pressure of a diesel engine will result in a/an ().Adecrease in maximum cylinder pressureBincrease in ignition lagCdecrease in fuel consumption per horsepower-hourDdecrease in exhaust manifold pressure
5、A re-heater, as used in an air conditi
A re-heater, as used in an air conditioning system, is designed to control the ()Achilled water temperatureBdew point temperatureCprimary air temperatureDdry bulb temperature
6、The compressor in an air-cooled conden
The compressor in an air-cooled condensing refrigeration system is short cycling on the high pressure cutout switch()Asystem is overcharged with...