From Mechanical Engineering License Review, Fifth Edition



A rectangular sluice gate is 6 ft wide and 9 ft high. It is immersed vertically in water with the 6-ft edges horizontal. Water stands on one side of the gate at a depth level with its upper edge and on the other side at a depth of 4.5 ft below the upper edge. The gate is hinged at the top edge and is held in equilibrium by a horizontal force applied at its lower edge. Calculate this force.


A flashboard 2.5 ft high mounted above the crest of a dam is supported by a standard (Schedule 40) 2-in. pipe of steel placed on 8-ft centers. The pipes fail and the flashboard goes down at a head on the crest of the dam amounting to 4.15 ft of water. ( a) What is the initial bending moment on each pipe in inch-pounds under static conditions? ( b) What is the maximum pipe stress if the section modulus of the pipe is 0.616 in. cube?


A cylindrical log is 1 ft in diameter and 20 ft long. What weight of iron must be tied to one end of the log to keep it floating in an upright position in seawater with 18 ft of the log submerged. Specific gravity of log is 0.7, of iron 7.9, and of sea water 1.03.


Assuming isothermal and steady flow, a pump takes suction from a large storage tank containing sulfuric acid (sp gr = 1.84) through a...

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Water Control Gates
Water control gates are used to control the mass flow of water or wastewater in various environmental and process applications.
Gate Valves
Gate valves and knife valves are linear motion valves in which a flat closure element slides into the media stream to shut off flow.
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Agricultural farming products and equipment concerns the vast array machinery, tools, and vehicles employed in horticultural and animal husbandry industries.

Centrifugal Pumps
Centrifugal pumps consist of a set of rotating vanes, enclosed within a housing or casing, that are used to impart energy to a fluid through centrifugal force.
Industrial Valves
Valves are mechanical devices that control the flow and pressure of liquids, gases, and slurries within a system. They are also known as regulators and are used in a wide variety of applications. Valves vary greatly in size, design, function, and operation.

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