Engine : Motor Plants and Auxiliary Boilers - 1279/947
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| Why should the main steam stop valve of an auxiliary boiler be eased off its seat and then gently closed before lighting off? |
| A) To ensure that the valve will not be seized shut when hot. |
| B) To check the valve packing. |
| C) To check for a tight bonnet seal. |
| D) To examine the valve stem for scars or nicks. |
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