Relation between brake efficiency, internal efficiency & mechanical efficiency - Thermodynamics

Q.  What is the relation between brake efficiency, internal efficiency and mechanical efficiency?
- Published on 21 Aug 15

a. ηInternal = ηMech * ηBrake
b. ηMech = ηInternal * ηBrake
c. ηBrake = ηInternal * ηMech
d. none of the above

ANSWER: ηBrake = ηInternal * ηMech

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