Email
info@vayudootaviation.com
Phone No
+91 7276526726
become a pilot
Home
About us
courses
CPL
ATPL
RTR(A)
Airline Cadet Program
IGRUA Entrance Prep
B.Sc. Aviation
Pilot Training
INDIA
USA
CANADA
SOUTH AFRICA
NEW ZEALAND
EUROPE
Aircraft Type-Rating
Airbus A320
Boeing 737
Blogs
contact
CPL Test Series
Question Bank
Questions for KW ENGINE MONITORING
Answer the following questions
Test Mode
Training Mode
1. What does the vibration measuring system indicate to the pilot?
Absolute magnitude.
Relative frequency.
Absolute frequency.
Relative amplitude.
2. Which of the following is least affected by variation in power supply voltage?
Galvanometers
Variometers.
Rheostats.
Ratiometers.
3. Thermocouples are?
Two similar metals connect at two points.
Two dissimilar metals connected at two points.
Two dissimilar metals separated by a dielectric material.
Two dissimilar metals connected at one point.
4. The yellow sector of the temperature gauge corresponds to?
A forbidden operating range.
A normal operating range.
An exceptional operating range.
A frequent operating range.
5. A millimetric voltmeter measuring the PD across the hot and cold junctions of a thermocouple, can be calibrated to indicate temperature by?
The cold junction is kept at absolute zero.
The cold junction is kept a zero degree Celsius.
The cold junction temperature is known.
The cold junction is kept at a constant temperature.
6. Where is EGT measured?
At the LP turbine inlet.
At the HP turbine outlet.
At the LP turbine outlet.
At the HP turbine inlet.
7. EPR is calculated by?
Subtracting LP compressor inlet pressure from JP turbine outlet pressure.
Diving LP turbine outlet pressure by LP compressor inlet pressure.
Dividing compressor inlet pressure by HP turbine outlet pressure.
Diving HP turbine outlet pressure by air inlet pressure.
8. The red pointer which is normally on the red line on the EGT (Exhaust Gas Temperature) indicators?
Moves when the corresponding value is exceeded and remains positioned at the maximum value that has been reached.
Shows the limit value not to be exceeded.
Allows the display of the parameter value to be adopted during take-off.
Shows the vibration level of the engine under consideration.
9. The probe used to measure the air intake pressure of a gas turbine engined powerplant is?
A Bourdon tube.
An anerold capsule.
A bellows sensor.
A differential capsule.
10. Typical vibration sensors include? 1. Inductive coils. 2. Phonic wheels.3. Magnetometers. 4. Piezo crystals.
1, 2, 4.
1, 4.
2, 4.
1, 3, 4.
11. Turbine outlet pressure is detected by?
Bourden tube.
Differential capsule.
Bellows.
Aneroid capsule.
12. What type of sensors are typically used to measure engine oil temperature?
Resistive probes.
Capacitive probes.
Reactive probes.
Thermocouples.
13. The transmitter of RPM indicator may consist of: 1. A magnetic senor supplying an inducted AC voltage. 2. A DC generator supplying a DC voltage. 3. A single-phase AC generator supplying an AC voltage. 4. A three-phase AC generator supplying a three-phase voltage. The combination of correct statements is?
1, 2, 3.
2, 3, 4.
1, 4.
1, 2, 3, 4.
14. Torque can be determined by measuring the?
Phase difference between 2 impulse tachometers attached to a transmission shaft.
Frequency of an impulse tachometer attached to a transmission shaft.
Quantity of light passing through a rack-wheel attached to a transmission shaft.
Oil pressure at the fixed crown of an epicycloidal reducer of the main engine gearbox.
15. If the EPR gauge over reads during the take-off run?
There is a danger that the aircraft will fall to take-off safely.
The engines will not start.
Climb performance will be improved.
The engine will exceed its limiting pressures and teperatures.
16. A millivolmeter measuring the electromotive force between the "hot junction " and the "cold junction" of a thermocouple can be directly gradusted in temperature values provided that the temperature of the?
Hot junction is maintained constant.
Cold junction is maintained constant.
Hot junction is maintained at 15° C.
Cold junction is maintained at 15° C.
17. The advantages of an electrical induction tachometer are: 1. The display is not sensitive to line resistance. 2. The measurement is independent of aircraft power supply. 3. The measurement is independent of temperature variations. 4. The option to use without restriction several Indicators connected in parallel to a single transmitter. The combination regrouping all the correct statements is?
2, 3, 4.
1, 2, 3, 4.
1, 2, 4.
1, 3, 4.
18. What type of sensor is employed to measure compressor air inlet temperature in a typical turbojet engine fuel system?
Mercury thermometer.
Optical pyrometer.
Temperature probe.
Alcohol thermometer.
19. The principle of detection of a vibration monitoring system is based on the use of?
2 high and low frequency filters.
2 high and low frequency amplifiers.
2 accelerometers.
A frequency converter.
20. If one of the probes in a typical gas turbine engine EGT system becomes defective, the indications would be?
Not significantly affected.
Too low.
Lost.
Too high.
21. The two main sources of information used to calculate turbojet thrust are the?
High pressure turbine rotation speed or the EPR (Engine Pressure Ratio).
Fan rotation speed (or N1) or the EPR (Engine Pressure Ratio).
Fan rotation speed (or N1) or the total pressure at the low pressure turbine outlet.
Fan rotation speed (or N1) or the total pressure at the high pressure compressor outlet.
22. If a remote sensing pressure measurement system uses a ratiometer rather than an ammeter as its indicator, it will be?
More sensitive to line resistance changes.
Less sensitive to line resistance changes.
Rendered unservicrable by line resistance changes.
Not affected by line resistance changes.
23. The measurement of the turbine temperature or of the EGT (Exhaust Gas Temperature) is carried out at the?
Combustion chamber intake.
High pressure turbine outlet.
Combustion chamber outlet.
High pressure chamber intake.
24. A system which measures both torque and engine RPM employs?
A phonic wheel at each end of the output shaft, coupled to a device which measures frequency and phase difference between the two outputs.
A phonic wheel at each end of the output shaft, coupled to a device which measures frequency and voltage differences between the two outputs.
A tacho-generator at each end of the output shaft, coupled to a device which measures frequency and phase difference between the two output signals.
A phonic wheel and a tacho-generator. The phonic wheel detects torque and the tacho-generator detects RPM.
25. The temperature measured by the CHT (Cylinder Head temperature) probe is The?
Average temperature within the whole set of cylinders.
Temperature of the carburetor to be monitored when the outside air temperature is between -5°C and 10° C.
Temperature of the exhaust gases.
Temperature within the hottest cylinder, depending on its position in the engine block.
26. What type of sensors are typically used to measure carburettor inlet temperatures?
Resistive probes.
Capacitive probes.
Reactive probes.
Thermocouples.
27. The speed of rotation of the motor in a tacho-indicator is?
Proportional to tacho-generator output voltage.
Proportional to tacho-generator output current.
Proportional to tacho-generator output frequency.
Constant.
28. The squirrel cage motor in a tacho-Indicator?
Drives the indicator needle directly.
Is driven by three phase AC current from a tacho-generator driven by the engine.
Is driven directly by the engine.
Is driven by the output from a DC tacho-generator driven by the engine.
29. A synchroscope is used on aircraft to?
Reduce the vibration of each engine.
Reduce the rpm of each engine.
Set several engines to the same speed.
Achieve optimum control of on-board voltages.
30. If a ratiometer is used in the indicator of temperature measuring system rather than an ameter?
It will be less affected by line resistance losses.
It will be ineffective due to line resistance losses.
It will always give accurate readings, regardless of line resistance losses.
It will be more affected by line resistance losses.
31. The signal supplied by a transmitter fitted with a 3-phase AC generator, connected to RPM indicator, is a DC voltage varying with the RPM?
The indicator is a plain voltmeter with a rev/min scale measuring an AC voltage, The frequency of which varies with the RPM.
The indicator rectifies the signal via a diode bridge and is provided with a voltmeter a three-phase voltage, the frequency of which varies with the RPM.
The indicaor converts the signal into square pulses which are the counted as an AC voltage varying with the RPM.
The indicator is provided with a motor, which drives a magnetic tachometer.
32. If the EPR gauge compressor inlet air tapping becomes blocked?
The gauge will under read.
The gauge will over read in all conditions of flight.
The gauge will over read during the take-off run.
The gauge will read zero.
33. The drag cup in a tacho-indicator?
Converts rotary motion into limited angular displacement proportional to the variable being measured.
Overcomes the effects of internal friction within the Indicator.
Converts limited angular motion into rotation.
Converts AC input into rotary motion.
34. A thermocouple type themometer consists of?
Two metal conductors of different type connected at one point.
A single-wire metal winding.
Two metal conductors of the same type connected at two points.
A Wheatstone bridge connected to a voltage indicator.
35. The disadvantages of a single-phase A.C. generator tachometer are: 1. The pressure of spurious signals due to D.C. generator commutator. 2. The importance of line resistance on the information value. 3. The influence of temperature on the techometer information. The combination regrouping all the correct statements is?
1, 2.
1, 3.
1, 2, 3.
2.
36. The Engine Pressure Ratio (EPR) is computed by?
Dividing turbine discharge pressure by compressor inlet pressure.
Multiplying compressor Inlet pressure by turbine discharge pressure.
Multiplying compressor discharge pressure by turbine Inlet pressure.
Dividing compressor discharge pressure by turbine discharge pressure.
37. Vibration sensors on a turbofan engine are typically located?
On the HP spool and by-pass duct.
Radially pointing on the fan and turbine casings.
On the gearboxes and output shafts.
Longitudinally pointing, on the fan and turbine casings.
38. A tacho-generator RPM measuring system employs?
A DC motor, the frequency of which varies with engine RPM and is fed to a DC motor in the Indicator.
A phonic wheel producing an AC signal, the frequency of which is fed to a synchronous motor in the indicator.
A three phase AC generator, the frequency of which varies with engine RPM, and is fed to a synchronous motor driving a drag cup in the indicator.
A single phase AC generator, the frequency of which varies with engine RPM, and is fed to a single phase sychronous motor driving a drag cup in the indicator.
39. In order to measure temperature the cylinder had temperature (CHT) gauge utillses a?
Ratiometer circult.
Bourdon tube.
Wheatstone bridge circuit.
Thermocouple consisting of two dissimilar metals.
40. What is a bellows used to measure?
Low temperatures.
Low pressures.
High pressures.
Density.
41. A remote sensing pressure gauging system measuring low pressures, typically employs a ________ to move _________ The variation in ________ are then measured using a _________ or ___________?
Bourden tube, variometer, capacitance, transistor, capacitor.
Differential capsule, ratiometer, current, capacitor, ammeter.
Aneroid capsule, capacitor, capacitance, wheatstone bridge, ratiometer.
Bellows, variable resister, resistance, wheatstone bridge, ratiometer.
42. A vibration monitoring system used ______ to measure ______ filters out unwanted _______, then indicates ________, to the pilot?
Accelerometers, radial movement, frequencies and noise, relative amplitude.
Radiometers, radial movement, frequencles, absolute frequency.
Accelerometers, axial movement, noise, relative amplltude.
Thermisters, radial movement, frequencies, absolute amplitude.
43. The pointer that aligns with the red line on a EGT gauge?
Is movable and indicates maximum temperature exceeding the red line.
Is adjustable to permit different limits to be set as required.
Is adjustable to permit higher limits to be set when taking-off at high mass in high mablent temperatures.
Indicates maximum temperature.
44. Where is EGT measured?
In the combustion chamber.
In the jet pipe.
At the turbine inlet.
At the turbine outlet.
45. The advantages of single-phase A.C. generator tachometer are: 1. The suppression of spurious signal due to a D.C. generator commutator. 2. The importance of line resistance on the information value. 3. The independence of the information in relation to the airborne electrical power supply. 4. The ease of transmission of the information. The combination regrouping all the correct statement is?
2, 3, 4.
2, 4.
1, 3.
1, 2, 3, 4.
46. The pressure probe used to measure the pressure of a low pressure fuel pump is?
A Bourdon tube.
A bellows sensor.
An anerold capsule.
A differential capsule.
47. The signal supplied by a transmitter fitted with a magnetic sensor, connected to an RPM indicator is a three-phase voltage frequency varies with RPM?
The indicator rectifies the signal via a diode bridge and is provided with a voltmeter measuring an AC voltage, the frequency of which varies with the RPM.
The indicator is a simple voltmeter with a rev/min scale measuring an AC voltage varying with the RPM?
The indicator converts the signal into pulses which are then counted.
The indicator is provided with a motor which drives a magnetic tachometer a DC voltage varying with the RPM.
48. The squirrel cage tachometer employs?
External AC power supply modified by the speed sensor.
A three phase AC generator producing a signal frequency proportional to RPM.
External DC power supply modified by the speed sensor.
A three phase AC generator producing a voltage proportional to RPM.
49. On an aeroplane equipped with a constant speed propeller, the RPM indicator enables?
Control of power.
Selection of engine RPM.
Control of the propeller regulator and the display of propeller RPM.
On a twin-engine aeroplane, automatic engine synchronisation.
50. What type of sensor is normally used to measure inlet air temperature where the signal is to be employed for altitude compensation in a conventional (non FADEC) engine fuel system?
Capacitive.
Resistive.
Bi-metalic.
Liquid expansion.
Submit
Make New Set
