The Pressure Instruments

Question 1

26.37.1 Define the terms: Engine Torque :

Answer 1

Torque is a force which produces a twisting or turning motion

Question 2

26.37.1 Define the terms: Engine Power. :

Answer 2

rate of doing work. Power = Work done divide by Time Taken

Question 3

26.37.2 Relate horsepower to kilowatts

Answer 3

1 Hp= 3/4 Kw or 746 Kilowatts

Question 4

26.37.3 Define rated power and explain the terms ‘rated altitude’ or ‘critical altitude’.

Answer 4

POH will normally state a rated power for the engines fitted to an Aircraft.

Rated altitude ( critical altitude) is the altitude at which power is developed at full throttle.

Question 5

26.37.4 Explain the following in broad terms: Thermal efficiency

Answer 5

the Materials & construction used in the engine to keep warmth in

Question 6

26.37.4 Explain the following in broad terms:

Mechanical efficiency:

Answer 6

relationship between mechanical power input and power output

Question 7

26.37.4 Explain the following in broad terms: Volumetric efficiency:

Answer 7

how effectively the engine ‘breathes’ or draws in the induction charge.

Question 8

26.37.6 Explain the general conditions for the most efficient engine operation.

Answer 8

High pressure & Low temperature