In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the()
- Apressurestat
- Bhigh pressure cutout
- Csolenoid valve
- Dlow pressure cutout switch
In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the()
1、In the operation of a flash type evapo
In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the ()....
2、In a flash type evaporator, the brine
In a flash type evaporator, the brine overboard pump is vented directly to the()Asaltwater heater shellBthe condensation of the saltwater feedCair ejectors, eductors, or a separate vacuum pumpDcondensation of the distillate
3、In a flash type evaporator, all saltwa
In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the().Asaltwater heater shellBsecond-stage condenserCatmosphereDsecond-stage flash chamber
4、In a shell-and-tube type hydraulic flu
In a shell-and-tube type hydraulic fluid cooler, the amount of heat transferred from the hydraulic fluid to the cooling water depends upon()At...
5、A.In R/t
A.In R/tAIn R/tBIn R/tClog2R/tD-log2R/t
6、An increase in rotor clearances in a r
An increase in rotor clearances in a rotary pump will ().Aincrease discharge pressureBdecrease pump capacityCdecrease pump cavitationDdecrease reaction ring clearance