单选题 Generator voltage will not build up when the field is flashed and solder is found on the brush cover plate. These are most likely indications of

A、 excessive brush arcing.

B、 armature shaft bearings overheating

C、 an open armature.

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相关试题

单选题 Which bearing is least likely to be a roller o ball bearing?

A、Master rod bearing (radial enne).

B、Crankshaft main bearing (radial engine).

C、Rocker arm bearing (overhead valve engine).

单选题 What is the purpose of the rate-of-change controller in a turbocharger system?

A、Limits the maximum manifold pressure that can be produced by the turbocharger at full Throttle?conditions.

B、Controls the rate at which the turbocharger discharge pressure will increase.

C、Controls the position of the waste gate after the aircraft has reached its critical Altitude.

单选题 Valve dearance changes on opposed-type engines using hydraulic lifters are accomplished By

A、rocker arm adjustn,ent.

B、push rod replacement.

C、rocker arm replacement.

单选题 It an engine operates with a low oil pressure and a high oil temperature, the problem May be caused by a

A、sheared od pump shaft.

B、clogged oil coder annular jacket.

C、leaking oil dilution valve

单选题 Which statement is correct regarding a continuous-flow fuel injection system used on Many reciprocating engines?

A、Fuel is injected at each cylinder intake port.

B、Fuel is injected directly into each cylinder.

C、Two injector nozzles are used in the injector fuel system for various speeds.

单选题 What method is ordinarily used to make idle speed adjustments on a float-type Carburetor?

A、An orifice and adjustable tapered needle.

B、An adjustable throttle stop or linkage.

C、An adjustable needle in the drilled passageway which connects the airspace of the float Chamber and the carburetor venturi.

单选题 What factor is not used in the operation of an aircraft gas turbine engine fuel control Unit?

A、Mixture control position.

B、Compressor inlet air temperature.

C、Power lever position.

单选题 What effect does high atmospheric humidity have on the operation of a jet engine?

A、Decreases compressor and turbine RPM.

B、Decreases engine pressure ratio.

C、Has little or no effect.