ENGINE INSTRUMENT PART 1

Why do helicopters require a minimum of two synchronous tachometer systems?. One indicates engine RPM and the other tail rotor RPM. One indicates main rotor RPM and the other tail rotor RPM. One indicates engine RPM and the other main rotor RPM.

The fuel flowmeter used with a continuous-fuel injection system installed on an aircraft horizontally opposed reciprocating engines measures the fuel pressure drop across the. manifold valve. fuel nozzles. metering valve.

Thermocouple leads. may be installed with either lead to either post of the indicator. are designed for a specific installation and may not be altered. may be repaired using solderless connectors.

On a twin-engine aircraft with fuelinjected reciprocating engines, one fuel flowmeter reads considerably higher than the other in all engine operating configurations. What is the probable cause of this indication?. Carburetor icing. One or more fuel nozzles are clogged. Alternate air door stuck open.

Which of the following instrument discrepancies require replacement of the instrument?. Red line missing from glass, glass cracked, fogged. Glass cracked, will not zero out, pointer loose on shaft, fogged. Will not zero out, redline missing from glass, glass cracked.

The fuel flowmeter indicator rotor and needle for a motor-impeller and turbine indicating system is driven by. an electrical signal. direct coupling to the motor shaft. a mechanical gear train.

Which of the following statements is true?. When a turbine engine indicates low EGT for a particular EPR, it means that the engine is out of trim. Some turbine-powered aircraft use EGT as the primary indicator of thrust produced. When a turbine engine indicates high EGT for a particular EPR, it means that the engine is out of trim.

What instrument on a gas turbine engine should be monitored to minimize the possibility of a 'hot' start?. RPM indicator. Turbine inlet temperature. Torquemeter.

What basic meter is used to indicate cylinder head temperature in most aircraft?. Electrodynamometer. Galvanometer. Thermocouple-type meter.

In regard to using a turbine engine oil analysis program, which of the following is NOT true?. Generally, an accurate trend forecast may be made after an engine's first oil sample analysis. It is best to start an oil analysis program on an engine when it is new. A successful oil analysis program should be run over an engine's total operating life so that normal trends can be established.

Which unit most accurately indicates fuel consumption of a reciprocating engine?. Fuel flowmeter. Fuel pressure gauge. Electronic fuel quantity indicator.

Turbine engine EGT thermocouples are constructed of. iron and constantan. copper and constantan. chromel and alumel.

Where are the hot and cold junctions located in an engine cylinder temperature indicating system?. Both junctions are located at the instrument. Both junctions are located at the cylinder. The hot junction is located at the cylinder and the cold junction is located at the instrument.

Which of the following instrument conditions is acceptable and does not require immediate correction?. Case paint chipped. Instrument glass fogged. Mounting screws loose.

The indication on a thermocouple-type cylinder head temperature indicator is produced by. resistance changes in two dissimilar metals. a difference in the voltage between two dissimilar metals. a current generated by the temperature difference between dissimilar metal hot and cold junctions.

A complete break in the line between the manifold pressure gauge and the induction system will be indicated by the gauge registering. prevailing atmospheric pressure. zero. lower than normal for conditions prevailing.

Engine oil temperature gauges indicate the temperature of the oil. entering the oil cooler. entering the engine. in the oil storage tank.

The fuel flow indication system used with many fuel-injected opposed engine airplanes utilizes a measure of. fuel flow volume. fuel pressure. fuel flow mass.

On an aircraft turbine engine, operating at a constant power, the application of engine anti-icing will result in. noticeable shift in EPR. a false EPR reading. an increase in EPR.

Which of the following types of electric motors are commonly used in electric tachometers?. Direct current, series-wound motors. Synchronous motors. Direct current, shunt-wound motors.

Basically, the indicator of a tachometer system is responsive to change in. current flow. frequency. voltage.

The purpose of an exhaust gas analyzer is to indicate the. brake specific fuel consumption. fuel/air ratio being burned in the cylinders. temperature of the exhaust gases in the exhaust manifold.

The exhaust gas temperature (EGT) indicator on a gas turbine engine provides a relative indication of the. exhaust temperature. temperature of the exhaust gases as they pass the exhaust cone. turbine inlet temperature.

A Bourdon-tube instrument may be used to indicate. pressure and temperature. pressure. temperature.

What is the primary purpose of the tachometer on an axial-compressor turbine engine?. Monitor engine RPM during cruise conditions. It is the most accurate instrument for establishing thrust settings under all conditions. Monitor engine RPM during starting and to indicate overspeed conditions.

A common type of electrically operated oil temperature gauge utilizes. either a wheatstone bridge or ratiometer circuit. a thermocouple type circuit. vapor pressure and pressure switches.

Powerplant instrument range markings. show whether the current state of powerplant operation is abnormal, unacceptable for a limited time, or authorized. are based on installed engine operating limits, which may exceed those limits shown on the engine Type Certificate Data Sheet. show whether the current state of powerplant operation is normal, acceptable for a limited time, or unauthorized.

An indication of unregulated power changes that result in continual drift of manifold pressure indication on a turbosupercharged aircraft engine is known as. Overshoot. Waste gate fluctuation. Bootstrapping.