starting air pressure too high
correct timing of starting air valves
three of the starting valves stuck
the turning gear disengaged
第1题：
Which of the following can cause a ribbon on an impact printer to tear?（）
第2题：
Worn intake valve guides
Pitted pre-combustion chambers
Loose valve tappets
High exhaust back pressure
第3题：
Which of the following cable types can cause interference on the network when disconnecting any one machine？（）
第4题：
cetane number
flash point
viscosity
setting point
第5题：
The fuser
The toner cartridge
The platen
The printhead
第6题：
The failure of which of the following components can cause a server to display a POST error message？（）
第7题：
clogged air filter
compression stroke
burned exhaust valves
all of the above
第8题：
Which of the following can lead to the contribution of LAN traffic congestion?（）
第9题：
Dirty lube oil filter
Too much piston ring wear
High lube oil viscosity
Low lube oil temperature
第10题：
starting air pressure too high
correct timing of starting air valves
three of the six starting valves stuck
the turning gear disengaged