MCQOPTIONS
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				| 1. | 
                                    Feed check valve is used in steam boilers to | 
                            
| A. | check the water level in the boiler. | 
| B. | check the feed water flow rate. | 
| C. | feed high pressure water to boiler and guard against its backflow through it. | 
| D. | none of these. | 
| Answer» D. none of these. | |