worn connecting rod bearings
worn engine cylinder liners
high cylinder firing pressure
stuck spring-loaded manhole covers
第1题：
You are located within a stationary high pressure area．Your aneroid barometer is falling very slowly．This indicates a（n）______．
A.Wind shift of 180°
B.Large increase in wind velocity
C.Decrease in the intensity of the system
D.Increase in the intensity of the system
第2题：
A generally circular low pressure area is called a(n)______．
A.cyclone
B.anticyclone
C.cold front
D.occluded front
第3题：
Sweating of the refrigeration system compressor crankcase is caused by_______ .
A.too much superheat
B.insufficient superheat
C.suction pressure too low
D.excessive refrigerant returning to the compressor
第4题：
compression pressure
lube oil header pressure
scavenge air pressure
piston ring blow-by
第5题：
damage to the un-loader operating diaphragm
an increase in current flow to the motor
high pressure in the receiver and filter
an excessive consumption of crankcase oil
第6题：
A barometer showing falling pressure indicates the approach of a ______.
A.high pressure system
B.low pressure system
C.high dew point
D.low dew point
第7题：
worn cylinder liner
faulty cylinder relief valve
excessive lube oil pressure
excessive scavenge air pressure
第8题：
A single barometric pressure reading of 28.60 indicates ______.
A.rapidly improving weather
B.deteriorating weather
C.a severe low pressure system
D.fair weather and calm
第9题：
excessive lube oil pressure
the proper seating of new rings
a worn cylinder liner
a malfunctioning cylinder relief valve
第10题：
decreases as temperature increases
increases with the temperature
is not affected by temperature
may increase or decrease as the temperature rises