Turbine Engine Instruments Test

Tt4 represents __________ __________ at the turbine engine __________.

total temperature, combuster inlet

Memo messages on an EICAS system are displayed with:

White text

What could NOT be the possible cause if a gas turbine engine has high exhaust gas temperature, high fuel flow, and low RPM at all engine power settings?

Loose or corroded thermocouple probes for EGT indicator

In a turbine engine, where is the turbine discharge pressure indicator sensor located (for the EPR system)?

Immediately aft of the last turbine stage.

The oil pressure gauge indicates:

Oil pressure at the outlet of the oil pressure pump.

A commonly used term, not usually associated with a station designation, but means "internal pressure in the engine burner section" is

'Pb'

Some newer high bypass, multi-spool turbofan engines utilize __________ for primary thrust indications instead of _________.

N1 RPM, EPR

The fuel-flow indication data sent from synchronous flow and the motorless flow transmitter is a measure of

Fuel mass.

In what units are turbine engine tachometers calibrated?

Percent of engine RPM

Two types of vibration pickups have been used to monitor turbine engine vibration levels. Which of the following is not one of the types of vibration pickups used?

Hydro mechanical accelerometer

Reference to a turbine engine tachometer, the RPM of the engine rotor may be sensed by:

1. Pulse ick-up system.

2. Mechanically-driven tachometer generator.

3. Piezoelectric accelerometer probe.

4. Mechanically-driven permanent magnet.

1, 2, & 4

Which instrument provides the primary indication of the engine power output for a turboprop or turboshaft engine?

Torque meter.

Engine pressure ratio is determined by

dividing turbine outlet total pressure by the engine inlet total pressure

EICAS messages that can be corrected on a time available basis are called

advisories

On the EICAS, the primary engine indication system for a thrust engine displays indications for which 3 engine measurements?

EGT, N1, AND EPR

Regarding the statements 1 and 2.

1. Engine pressure ratio (EPR) is a ratio of the exhaust gas pressure to the engine inlet air pressure, and indicates the thrust produced by the engine.

2. Engine pressure ratio (EPR) is a ratio of exhaust gas pressure to the engine inlet pressure and indicates the volumetric efficiency of the engine.

1 is true

2 multiple choice options

The exhaust gas temperature (EGT), indicator on a gas turbine engine provides a relative indication of the:

turbine inlet temperature

In a turbine engine, oil temperature can be an indication of proper operation of the oil systems

engine oil cooler

On a turbine engine, with a fixed power lever position, the application of engine anti-icing will result in:

Decrease in EPR

The fuel pressure Indicator:

Helps the flight crew determine fuel flow stoppage was caused by a problem in the engine or a problem in the aircraft fuel system

What instrument on a gas turbine engine Should be monitored to minimize the possibility of a "hot" start?

turbine inlet temperature

The Crew Alert category in an EICAS that does not give aural alerts is the:

advisory

Fuel flow gauges in gas-turbine engines are calibrated in:

pounds per hour

Jet engine EGT thermocouples are usually constructed of what two metals:

chromel and alumel

Turbine station number 3 designates the __________ section of the engine.

inlet to the high pressure compressor

An engine Oil temperature Indicator frequently is provided in a turbine engine to show the temperature of the oil as it exits the

oil cooler

EPR systems typically

Operates on AC power only

On an axial flow, non-after burning turbine engine, the engine station number "5" would designate which engine station?

turbine inlet

What is the primary purpose of the tachometer on an axial-compressor turbine engine?

Monitor engine RPM during starting and to indicate over speed conditions.

The abbreviation used to designate a station ahead of the engine for the ambient or outside air is:

'am'

Which of the following is the most critical of all the turbine engine indications?

TIT

2 multiple choice options

On turboprop engines, the speed of the gas generator is referred to as.

Ng speed

When station designations are used to identify various temperatures and pressures throughout an engine, the subscript 's' designates 'static' and the subscript 't' designates 'temperature'

True or False

false

1 multiple choice option

An EICAS system can be either manually or automatically controlled.

True or False

true

1 multiple choice option

If an EICAS CRT fails in-flight, the indications normally displayed on that CRT are no longer available

True or False

false

1 multiple choice option

EGT gauges are normally calibrated to read in degrees Celsius

True or False

true

1 multiple choice option

For the "crew alert" portion of the EICAS system, alerts are categorized by the degree or urgency of the alert. What are the four categories of alerts in order of urgency?

warning, caution, advisory, memo

1, 3, 5, & 6

What are the three colors of text typically used for crew alerts on the EICAS system?

white, amber, and red

The fuel pressure Indicator on a gas turbine engine normally shows the fuel pressure where in the system?

Inlet of the engine driven fuel pump

What is the name of the test box used to calibrate and troubleshoot the EGT system on a turbine engine (other than a multi meter)?

Barfield Calibration Equipment