__________ pressure 减轻压力
单选题In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?（）A its pressure and temperature are both loweredB its pressure and temperature are both raisedC its pressure is lowered and its temperature is raisedD its pressure is raised and its temperature is lowered
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单选题Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）A At zero load the intake manifold pressure is greater than the exhaust manifold pressureB At full load the intake manifold pressure and exhaust manifold pressure are equalC At full load the intake manifold pressure is less than the exhaust manifold pressureD At full load the intake manifold pressure is greater than the exhaust manifold pressure
单选题Thermostatic expansion valves can be adjusted for （）.A suction pressure onlyB head pressure onlyC superheat onlyD suction pressure and box temperature
单选题Which of the following best describes the thermodynamic effect on the pressure and volume relationship with regards to saturated gases?（）A As pressure decreases, volume increasesB As volume increases, pressure increasesC As volume decreases, pressure decreasesD As pressure increases, volume increases
名词解释题定向压力（directional pressure）
单选题An auxiliary reservoir for starting auxiliary engines should be kept at （）.A low pressure at all timesB full pressure at all timesC low pressure at intermittenceD full pressure at intermittence
判断题prefilter pressure high/low是需要检查滤器前压力传感器、滤器、管路、血流。（）A 对B 错
