_____________ is also known as fuel rate extrapolation method.

1.	_____________ is also known as fuel rate extrapolation method.
A.	Morse test
B.	Motoring test
C.	Willan‚Äö√Ñ√∂‚àö√ë‚àö¬•s line method
D.	Retardation test
Answer» D. Retardation test

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