【单选题】A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal .the probable ___.
C.
stuck or broken piston rings
D.
low air injection pressure
【判断题】单位可以根据需要,自行设立专职消防队,不必经有关部门批准。
【单选题】The Magna Carta includes the following clauses BUT ________.
A.
the King could not exact payment from the vassals without their consent.
B.
merchants should be allowed to move about freely.
C.
modern rights and privileges should be given to the towns.
D.
no freeman should be arrested, imprisoned or deprived of their freedom.
【单选题】High exhaust temperature and black smoke exhausting from an auxiliary diesel engine can be caused by _____.
B.
low combustion temperature
C.
plugged fuel nozzle holes
D.
excessive compression pressure
【单选题】The king allowed no such subordinate arrangements to interfere with his great scheme of _________ and reward.
【单选题】When an auxiliary boiler is panting and emitting black smoke, you should _____.
A.
increase the fuel oil temperature
B.
decrease the fuel oil temperature
C.
decrease the fuel oil supply pressure
D.
increase the air supply