as the third engineer ,what precautions do you need take to prepare for PSC inspection ？
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What causes the lube oil pressure of the engine to drop ？
If the superheat value of a thermostatic expansion valve is set too low, the _.
A. the suction line will be abnormally cold and liquid may slug back to the compressor
B. the suction line will be hot due to a reduced amount of refrigerant returning to the compressor
C. the temperature of the refrigerant within the condenser will remain the same
D. the temperature of the refrigerant passing through the sub-cooler will decrease
The frequency of an alternator at a given r/min is determined by the _______ .
A. number of turns of wire in the armature coil
B. number of magnetic poles
C. strength of the magnets used
D. output voltage
_______is usually driven by the engine camshaft and supplies pilot air to the cylinder air
An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
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