If_an_annulus_has_an_inner_diameter_of_d_1_and_an_outer_diameter_of_d_ – McqOptions

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1.	If_an_annulus_has_an_inner_diameter_of_d_{_1}_and_an_outer_diameter_of_d_{_2}_then_the_equivalent_diameter_is$
A.	2 d<sub> 2 </sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® d<sub> 1</sub>
B.	d<sub> 2 </sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® 2 d<sub> 1</sub>
C.	d<sub> 1 </sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® d<sub> 2 </sub>
D.	d<sub> 2 </sub>‚Äö√Ñ√∂‚àö√ë‚àö¬® d<sub> 1</sub>
Answer» E.

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