The permissible limit of hardness of water fore low pressure boiler is – McqOptions

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1.	The permissible limit of hardness of water fore low pressure boiler is _____________________?
A.	30 mg/litre
B.	40 mg/litre
C.	50 mg/litre
D.	60 mg/litre
Answer» D. 60 mg/litre

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