| While bunkering heavy fuel, what quick/easy test can one perform onboard to determine the compatibility of 'old' with 'new' fuel? |
| A) Take equal samples of both fuels, elevate their temperature, mix them vigorously. If no frothing occurs, they are compatible. |
| B) Use blotter paper with a single concentric drop of 'old' and 'new' fuel, if they do not form separate circles, the fuels may be deemed compatible. |
| C) Mix two equal samples of the two fuels at elevated temperatures and determine if they become a homogeneous mixture. |
| D) Perform a running viscosity test of both fuels, at the same temperature, if the viscosities are equal, they should be compatible. |
