Fluid Mechanics and Hydraulics Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Fluid Mechanics and Hydraulics flashcards as text
Liquid pressure at a given depth depends on:
Answer: The depth and the fluid's density
Pressure increases with both depth and fluid density, independent of container shape.
A water tower is built tall mainly to:
Answer: Provide high pressure from gravity to the homes below
Height creates gravitational pressure that delivers strong water flow to lower buildings.
In two connected containers of different shapes filled with the same liquid, the liquid level will:
Answer: Be the same height in both
In connected vessels, a static liquid settles to the same level regardless of shape.
A dam is built much thicker at its base than at its top because:
Answer: Water pressure is greatest at the bottom
Pressure increases with depth, so the deepest part of the dam must resist the most force.
Which factor does NOT affect the pressure at the bottom of a tank of still water?
Answer: Surface area of the bottom
Pressure equals density × gravity × depth and does not depend on bottom area.
A siphon can move water over the edge of a container without a pump mainly because of:
Answer: Atmospheric pressure and gravity
Atmospheric pressure pushes water up while gravity pulls the longer down-leg, sustaining flow.
Compared to fresh water, an object placed in denser salt water will:
Answer: Float higher
Denser salt water provides more buoyant force, so objects float higher in it.