單項(xiàng)選擇題The fuel oil pressure and forced draught pressure should be matched to ensure good combustion with a full steady flameIn the sentence the word “match” means （）

A.join with
B.mix
C.be equal to
D.be constant


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1.單項(xiàng)選擇題For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.

A.the bottom of the column；the cylinder blocks
B.the top of the column；the cylinder heads
C.the top of the column；the cylinder blocks
D.the bottom of the column；the cylinder heads

2.單項(xiàng)選擇題As to the low speed diesel engine, if you want to change the coolant flow for a certain cylinder, you can regulate （）.

A.the inlet valve
B.the outlet valve
C.both the inlet valve and the outlet valve
D.the pump inlet valve

4.單項(xiàng)選擇題The opening or closing of the cylinder starting valve is controlled by （）.

A.the starting air distributor
B.the cut-off valve on the air main
C.the main starting valve
D.the air bottle control valve