Diesel Mechanic

A specific period when power demand of a system is comparatively low. Counted from 10 p.m. until 6 a.m., from Monday through Saturday and during the whole day on Sunday by NERC.

While working as a diesel mechanic is skilled work entirely, the 2 most important things are to have an analytic mind and the ability to read and understand blueprints and instruction manuals. That is is because each engine is different and it is the small intricacies in their make-up that end up in complicated problems or maintenance issues.

Rotor is the element that on, which the rotating of a generator depends.

Normally used either to regulate or condition power from a raw power source like electric utility grid.

Diesel mechanic is typically responsible to operate, handle, maintain and repair diesel engines that are used to run any machinery including vehicles, generators and other machinery.

A device which holds open the intake or exhaust valve, thereby permitting the engine to be turned over without compression. This is one method of engine braking where by the power stroke is cancelled.

A thin sandwich strip of two metals with very dif- ferent heat expansion rates that bends to the left or the right due to heat caused by resistance to voltage.

The taper at the thread end of a tap or the throat of a die, made by cutting away the crests of the first few threads. This distributes the work of cutting over several threads and acts as a guide in starting the tap or die. The chamfer is relieved to facilitate cutting.

Combustion which occurs without change in pressure. In an engine, this is obtained by a slower rate of burning than with constant volume combustion.

A rotating component of irregular shape. It is used to change the direction of the motion of another part moving against it, e.g., rotary into reciprocating or variable motion.

Speeds at which the frequency of the power strokes synchronize with the crankshaft's natural frequency. If the engine is operated at one of its critical speeds for any length of time, a broken crankshaft may result.

Normally used in control circuits, relay is a switch driven by electricity and rules over contactor by virtue of low amperage contacts.

Ratio of power output in the form of brake horsepower to equivalent power input in the form of heat from fuel. Typical brake thermal effidency ranges from thirty to forty-two percent.

Automobiles, trucks, buses, marines, and construction areas are popular types that are based on diesel engines.

Either of the two positions when the crank and connecting rod are in a straight line at the end of the stroke. The total piston travel is the distance between the two dead center positions.

A device that reduces both exhaust smoke and noise by slowing engine acceleration slightly until adequate turbocharger boost pressure is present.

A sensor which sends a range of voltages in DC to the ECM to describe, for example, coolant temperature, engine oil pressure, or atmospheric pressure.

A valve assisted by a spring,'which is opened by a difference of pressure acting in one direction and closed by a difference in pressure acting in the opposite direction.

To harden the outer surface of metal to a given case or shell depth, while leaving the inner portion soft to absorb shocks and allow bending.