The pressure head of a pump is given in the unit of （）.
The weather is often（）in a high-pressure area.
The atmosphere in the vicinity of a high pressure area is called a(n)（）.
In the Southern Hemisphere winds in a low pressure system rotate in a（）.
In a vacuum distillation system, the case is the higher the pressure, （）.
In a compression refrigeration plant the refrigerant is under low pressure in the （） and under high pressure in the （）.
A drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A sudden drop in diesel engine cylinder compression pressure can be caused by（）
In the Northern Hemisphere，gusty winds shifting clockwise，a rapid drop in temperature，thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies，indicate the passage of a(n)（） .
If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.
A dirty fuel oil filter is can be detected by （） Ⅰ.fuel oil analysis Ⅱ.observing the pressure drop across the filter
A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A slow rise in the barometric pressure forecasts（）.
The vapor pressure of a gas is the pressure necessary to keep it in a(n)（）.
Charging-air pressure increases if there is incorrect combustion and drop in the （） of the diesel engine.
When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil （）.
If over a period of weeks the air-box pressure of a turbo-charged, diesel engine, operating at full load, appears to be dropping off, the cause can be （）.
The terminal indicates to you that they are going to use a booster pump to assist the discharging operation. You start the discharge，and in a few minutes the pressure drops sharply. This could be a result of the（）.
In a simple series circuit, the entire source voltage will drop across （）
The highest pressure in a diesel engine cylinder normally occurs （）.
The idiom “drop in a bucket” means __________ .
What does the hunter in “A Worn Path” drop?
The temperature of the world in the past ten years has dropped a little______.
The pressure range between the system cut in and cut out pressures in a refrigeration unit is known as_______.
