Final answer:
Yes, a first class grade A engineer could be in charge of a low pressure boiler of 400 bhp if they have the necessary knowledge and skills, and if the boiler has been approved by the A.S.M.E.
Step-by-step explanation:
Yes, a first class grade A engineer could be in charge of a low pressure boiler of 400 bhp, as long as the engineer possesses the necessary knowledge and skills to operate the boiler safely and effectively.
In the field of engineering, it is important for professionals to have a thorough understanding of different types of boilers and their corresponding safety requirements. An engineer with a first class grade A qualification would generally possess the necessary skills and knowledge to handle a low pressure boiler of 400 bhp, given that they have received appropriate training or have experience in this specific type of boiler.
However, it is important to note that the A.S.M.E. approval could also be a determining factor. The A.S.M.E. (American Society of Mechanical Engineers) is an organization that sets standards and guidelines for the design, operation, and maintenance of pressure vessels, including boilers. If a low pressure boiler of 400 bhp has received A.S.M.E. approval, it signifies that the boiler meets the safety and operational standards set by the organization, which could further support the decision to have a first class grade A engineer in charge of it.