The ship-docking tug to which you are assigned has main engines fitted with injectors similar to those shown in the illustration. What statement is true concerning the operating principle of this type of injector? Illustration MO-0151

Question

Accepted Answer

The fuel pressure within the annulus is a needle valve opening force, the compression load on the spring is a needle valve closing force.

Answer

The fuel pressure within the annulus and the compression load on the spring are both needle valve closing forces.

Answer

The fuel pressure within the annulus is a needle valve closing force, the compression load on the spring is a needle valve opening force.

Answer

The fuel pressure within the annulus and the compression load on the spring are both needle valve opening forces.

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