🔍 Key Concepts

• Carefully identify what two surfaces the dimension I is measured between on the left side of the drawing • Notice the other vertical dimensions nearby (the 1 inch and 2 inch dimensions and the 0.010 gasket thickness) and how they relate to the stack‑up of parts • Use simple addition/subtraction of these known dimensions to solve for the unknown distance I

💭 Think About

• From which exact surface on the end cover does dimension I start, and at what surface on the pump case does it end? • If you look at the total distance from the top reference line down to the lower reference line, which pieces of that distance are already labeled, and which remaining portion must be I? • How does the very thin 0.010 gasket fit into the vertical stack of parts—does it add to or reduce the clearance represented by I?

✅ Before You Answer

• Confirm that you are measuring I only between metal surfaces that actually touch or are separated by the gasket, not including bolt heads or other hardware • Double‑check that you’ve correctly added/subtracted the 1 inch, 2 inch, and 0.010 inch dimensions, keeping track of which ones are above and below the gasket • Before picking an answer, see whether your computed value is closest to one of the choices (A–D) after rounding sensibly to the nearest 1/8 inch