單項(xiàng)選擇題For a fire to begin there must be present a combustible material, oxygen or air to （）combustion, and a source of heat at a temperature high enough to start combustion.
A.begin
B.support
C.last
D.extinguish
您可能感興趣的試卷
你可能感興趣的試題
1.單項(xiàng)選擇題Start the turning gear, and with some one hand-operating the cylinder lubricators at regular intervals, and with the indicator cocks （）, and with the control gear in the （）position, give the engine at least one complete turn.
A.open；“stop”
B.closed；“stop”
C.open；“start”
D.closed；“start”
2.單項(xiàng)選擇題If the engine can be started and maneuvered on high viscosity fuel, the （）of the fuel reaching the injectors should be raised to such a point that the viscosity is less than the required value, ie27c St.
A.pressure
B.temperature
C.viscosity
D.density
最新試題
The ISPS Code consists of a mandatory section-Part A, which shows（）
題型：單項(xiàng)選擇題
If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）
題型：單項(xiàng)選擇題
The treatment of the fuel oils involves storage, heating, filtering and（）
題型：單項(xiàng)選擇題
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）
題型：單項(xiàng)選擇題
（）connectors hold best if a wire is accidentally pulled or a connection becomes loose.
題型：單項(xiàng)選擇題