Gate valves have only rising stems.

• A. Partially
• B. True
• C. Not sure
• D. False

Answer: (D)

Gate valves can use either rising or non-rising stems. In a rising-stem design, turning the handwheel lifts the stem along with the gate, so the stem visibly moves as the valve opens or closes, and you may have a direct indication of position. In a non-rising stem design, the stem stays in place while the gate moves up and down through threaded motion inside the bonnet, so you don’t see the stem rise even though the valve is opening or closing. Because both configurations exist and are chosen for different installation needs (space above the valve for a rising stem, or compact/submerged setups for a non-rising stem), the statement that gate valves have only rising stems isn’t correct.