The amount of fuel delivered by a helical plunger fuel injection pump is controlled by ___

A.sensors

B.filters

C.injectors

D.pipes

When the fuel oil is burning in the combustion chamber, it _____.

A.gives up large amount of heat

B.gives off large amount of heat

C.gives up large amount of steam

D.gives off large amount of steam

The amount of fuel delivered by a unit injector is controlled by the _____.

A.camshaft

B.main spring

C.rack position

D.nozzle orifice size

What effect will the increased use of DME instead of diesel fuel probably have？

A. It will reduce the amount of pollutants in the air.

B. It will increase the amount of unpleasant odors from vehicles.

C. It will eventually destroy the ozone layer.

D. It will reduce the cost of running large vehicles.

A.quantity of fuel to be received

B.flash point of the fuel as it is received

C.fuel temperature as it is received

D.viscosity of the fuel being received

A.indicates the amount of abrasive material in the fuel

B.affects the starting ability of a cold engine

C.determines the amount of fuel penetration engine

D.affects the compression ratio of an operating engine

A．metering

B．timing

C．rate of injection

D．rate of distributio

The ash content of a fuel oil is significant to the operating engineer because it _____.

A.is an indication of the amount of noncombustible material present in the oil

B.indicates the quantity of energy released by burning a unit amount of the fuel

C.is useful for determining proper atomization temperatures

D.reflects the overall thermal efficiency of the fuel oil service system

A.The amount of fuel injected will be increased

B.The start of injection will be retarded

C.The nozzle will permit fuel to dribble

D.The spray pattern will be distorted