Where is an exit sign required?

Where is an exit sign required? Must be installed on, above or adjacent to each door providing direct egress from a storey to an enclosed or external stairway, passageway or ramp serving as a required exit; and on, above or adjacent to a door to an external access balcony leading to a required exit. What […]

What did mechanical engineers invent?

What did mechanical engineers invent? Catapults, battering rams, chariots and siege towers were all the products of mechanical engineering. Many of the machines of modern warfare, such as armored vehicles, ships, aircraft, artillery and firearms, also owe their existence to mechanical engineers. What are the new technologies in mechanical engineering? 6 Mechanical Engineering Innovations that […]

How does air content affect concrete strength?

How does air content affect concrete strength? How does air content affect strength? A. Intentionally entrained air voids improve the resistance of concrete to damage from cycles of freezing and thawing. Any air voids reduce the strength of concrete, with about a 5% reduction in strength for each 1% increase in the volume of air […]

Why is dimensional tolerance important?

Why is dimensional tolerance important? Dimensional tolerances are key in making parts right. Using them appropriately will save time spent coordinating with the manufacturer, circumvent design issues, and reduce unnecessary costs. However, while dimensional tolerances are important, so are geometric tolerances in fully defining parts. What is dimensional tolerance and why is it important? If […]

How do you calculate pump discharge pipe size?

How do you calculate pump discharge pipe size? He said his rule of thumb was to size the discharge pipe to that of the pump’s discharge flange. For example, if the pump’s discharge nozzle was 150mm, he would use a 150mm nominal size pipe for his discharge header. What is pump discharge pressure? Fire Engine […]

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