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39問 • 2年前

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It is an accessory oficn installed on modern boilers to preheat air for combustion before it enters the boiler furnace.

air preheater

A device or an instrument used to record the cylinder pressure of an engine and piston travel in an X-Y graph, where pressure forms the vertical axis and piston travel forms the horizontal axis

Engine Indicator

This diagram is used by the operating engineer to detect or determine leaky piston packing, sticking piston, incorrect valve timing, loose bearings, restricted and or outlet piping, etc.

Indicator diagram

The power output of the generator.

Electrical Power

The amount of fuel needed to perform a unit of power.

Specific fuel consumption

The ratio of heat converted to useful power to the heat supplied.

Thermal efficiency

The ratio of the actual power of the engine to its ideal power.

Engine efficiency

The ratio of the cylinder volumes after and before the combustion process.

Cut-off ratio

The position of the piston when it forms the smallest volume in the cylinder.

Head End Dead Center Position

The power developed in the engine cylinder as obtained from the pressure in the cylinder.

Indicated power

The difference between the maximum and minimum volume.

Clearance Volume

What is the primary purpose of an Electric Power Substation?

To switch oi transform voltage levels.

What does the term "Load" refer to in the context of electric power?

The power delivered by a machine.

Which curve represents the average of daily load curves over a one-month period and is used for rate establishment?

Monthly Load Curve.

What is the "Maximur Demand" often referred to as?

Peak Load.

What is the purpose of a Load-Duration Curve?

To rearrange data from a chronological load curve.

What does "Demand Factor" measure?

The ratio of connected load to maximum demand.

What is the "Diversity Factor" in electrical systerns?

The ratio of individual maximum demands to simultaneous maximur demand.

What is "Base Load" in the context of elecirical system ?

The minimum load over a given period.

What does a Load-Energy Curve indicate?

The total energy for a given load and all values less than that load.

What is "Connected Load" defined as?

The sum of all connected equipment.

What does the "Annual Load Curve" represent?

The maximum demand over a year.

What does "Load Factor" measure?

The ratio of connecied load to maximum demand.

What is the "Coincidence Factor"?

The reciprocal of diversity factor.

What is the "Plant Factor"?

The ratio of average load on the plant to the aggregate rating of all generating equipment.

What is the "Capacity Factor" defined as?

The ratio of average load on a machine to its rating.

An engine in which the fuel is burned outside of the power cylinder.

External combustion engine

Which of the following compressors is generally used for gas turbines is ____

Axial flow type

What type of gas turbine is used in air craft?

Open cycle type

An engine in which the fuel is burned directly within the working cylinder.

Internal combustion engine

The portion of the piston which extends below the piston pin and serves as a guide for the piston and connecting rod.

Piston skirt

Rings located in the grooves of the piston usually near the top and near the bottom

Piston ring

Increasing the total amount of charging air in the working cylinder of the engine.

Supercharging

In a four stroke Diesel engine, drawing air into the cylinder is what stroke?

Fourth stroke

An engine where ignition is caused by heat of compression

Compression ignition engine

An engine in which the fuel is burned directly within the working cylinder

Internal Combustion Engine

In a gas turbine combined cycle plant, a waste heat boiler is used to

recover heat from exhaust gases

overall efficiency of a gas turbine is ____

less than diesel cycle efficiency

a temperature is required to ignite the fuel oil?

700 to 900 F

machine design 2

ユーザ名非公開 · 5問 · 2年前

machine design 2