Results
Q1. The total air temperature (TAT) is always :
higher than Static Air Temperature (SAT) depending on the Calibrated Air Speed (CAS).
Q2. A millivoltmeter measuring the electromotive force between the “hot junction” and the “cold junction” of a thermocouple can be directly graduated in temperature values provided that the temperature of the:
cold junction is maintained constant.
Q3. Which of these statements is true?
The probes used for SAT measurements have a recovery factor of 0.75 to 0.90, while the probes used for TAT measurements have a recovery factor of around 1.00.
Q4. In transport airplanes, the temperatures are generally measured with : 1- resistance thermometers 2- thermocouple thermometers 3- reactance thermometers 4- capacitance thermometers 5- mercury thermometers The combination regrouping all the correct statements is :
1, 2
Q5. A thermocouple type thermometer consists of:
two metal conductors of different type connected at one point.
Q6. The airplane outside air temperature “probe” measures the :
“total” air temperature minus kinetic heating effects in order to obtain the static temperature.
Q7. The measurement of the turbine temperature or of the EGT (Exhaust Gas Temperature) is carried out at the :
high pressure turbine outlet.
Q8. The sensors used to measure the exhaust gas temperature on an airplane equipped with turbojets are:
thermocouples.
Q9. A thermocouple can be made of:
two metal conductors of different nature fixed together at two points.
Q10. The electromotive force of a thermocouple is not modified if one or several intermediate metals are inserted in the circuit provided that:
contact points are maintained at equal temperature between these different metals.
Q11. The main advantage of a ratiometer-type temperature indicator is that it:
carries out an independent measurement of the supply voltage.
Q12. Non-electrical temperature measurements may be done by
all of the above
Q13. The yellow sector of the temperature gauge corresponds to:
an exceptional operating range.
Q14. Iron and brass are commonly used in bimetallic thermometers, because
they have two different coefficients of linear expansion.
Q15. Given : M is the Mach number Ts is the static temperature Tt is the total temperature
Ts = Tt /(1+0.2. M²)
Q16. In order to measure temperature the cylinder head temperature (CHT) gauge utilises a :
thermocouple consisting of two dissimilar metals.
Q17. To permit turbine exit temperatures to be measured, gas turbines are equipped with thermometers which work on the following principle:
thermocouple
Q18. The white sector of the arc of a temperature gauge corresponds to:
a special operating range.
Q19. The temperature measured by the CHT (Cylinder Head temperature) probe is the :
temperature within the hottest cylinder, depending on its position in the engine block.
Q20. The measurement of exhaust gas temperature (EGT) is normally based upon the principle of
voltage generation in a thermocouple
Q21. The static air temperature (SAT) is :
an absolute temperature expressed in degrees Celsius
