In the M978 300-GPM FS, Model A uses 15 canisters and Model B uses 6 coalescers and 2 canisters.

In the M978 300-GPM FS, Model A uses 15 canisters and Model B uses 6 coalescers and 2 canisters.

• A. Model A: 15 canisters; Model B: 6 coalescers, 2 canisters
• B. Model A: 15 canisters; Model B: 5 coalescers, 3 canisters
• C. Model A: 12 canisters; Model B: 6 coalescers, 2 canisters
• D. Model A: 15 coalescers; Model B: 2 canisters

Answer: (A)

In this fuel system, filtration elements come in two types with different roles: canisters provide particulate filtration, while coalescers remove water from the fuel by coalescing droplets so they can separate and be drained. The two models are set up differently to address these needs. Model A is configured with only canisters (15 of them), focusing on thorough particulate filtration. Model B incorporates coalescers to remove water and also uses canisters (2) for final filtration, totaling 6 coalescers and 2 canisters. This arrangement matches how the system is designed to handle both filtration and water separation. Other configurations would not reflect these element counts or the intended function of coalescers versus canisters.

In this fuel system, filtration elements come in two types with different roles: canisters provide particulate filtration, while coalescers remove water from the fuel by coalescing droplets so they can separate and be drained. The two models are set up differently to address these needs. Model A is configured with only canisters (15 of them), focusing on thorough particulate filtration. Model B incorporates coalescers to remove water and also uses canisters (2) for final filtration, totaling 6 coalescers and 2 canisters. This arrangement matches how the system is designed to handle both filtration and water separation. Other configurations would not reflect these element counts or the intended function of coalescers versus canisters.