Why is the study of technological history important?

Describe the common heat treatment for gears and gear teeth.

You are asked to look into adding a circuit for a new pump in a hydraulics lab. After some investigation of the electrical service in the building you find that there are a few voltage options; 120V, single-phase; 208V, single-phase; 208V, 3-phase.

Which of the following vehicles has no emissions?

Explain the process of predicting equipment failure?

A factory has an electrical load of 1600 kW at a lagging power factor of 0.8. An additional variable power factor load is to be added to the factory. The new load will add 320 kW to the factory.

When an electrical signal travels through a conductive wire, it produces an electromagnetic (EM) field. Likewise, when an EM field encounters a conductive wire, it produces a proportional electrical current. A. True B. False

Liquid water enters an adiabatic piping system at 15°C at a rate of 8kg/s. If the water temperature rises by 0.2°C during flow due to friction, the rate of entropy generation in the pipe is?

What does stall mean?

A flow of 100 mgd is to be developed from a 190-mi^2 watershed. At the flow line the area's reservoir is estimated to cover 3900 acres. The annual rainfall is 40 in. the annual runoff is 14 in. and the annual evaporation is 49 in. 1.

The ducts of an air heating system pass through an unheated area. As a result of heat losses, the temperature of the air in the duct drops by 4°C.