| According to Coast Guard Regulations (46 CFR), which of the following statements is true concerning the water level indicating device for the auxiliary boiler shown in the illustration? |
| A) The illustrated arrangement may be used on any steam boiler, for any steam pressure, up to 300 psig. |
| B) The minimum size of the piping connecting the water column to the steam drum is to be one inch. |
| C) The shutoff valve on the boiler drum must be of cast iron. |
| D) A minimum of three test cocks may serve as the primary water level indicator on boilers under 250 psig. |
