What is the contact factor for heating coil, if td1 = 11°C, td2 = 32 – McqOptions

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1.	What is the contact factor for heating coil, if td1 = 11°C, td2 = 32°C and td3 = 47°C?
A.	0.5833
B.	0.4833
C.	0.7833
D.	0.1833
Answer» B. 0.4833

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