What type of pump uses pistons, diaphragms, gears, vanes, lobes, or screws to deliver a constant volume of fluid with each rotation or stroke?
A. Axial pump
B. Centrifugal pump
C. Dynamic pump
D. Positive placement pumps
A. Incorrect. Positive placement pumps use pistons, diaphragms, gears, vanes, lobes, or screws to deliver a constant volume of fluid with each rotation or stroke.
B. Incorrect. Positive placement pumps use pistons, diaphragms, gears, vanes, lobes, or screws to deliver a constant volume of fluid with each rotation or stroke.
C. Incorrect. Positive placement pumps use pistons, diaphragms, gears, vanes, lobes, or screws to deliver a constant volume of fluid with each rotation or stroke.
D. Correct. Positive placement pumps use pistons, diaphragms, gears, vanes, lobes, or screws to deliver a constant volume of fluid with each rotation or stroke.
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Fill in the blank(s) with the appropriate word(s).