問題一覧
1
It is an accessory oficn installed on modern boilers to preheat air for combustion before it enters the boiler furnace.
air preheater
2
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
3
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
4
The power output of the generator.
Electrical Power
5
The amount of fuel needed to perform a unit of power.
Specific fuel consumption
6
The ratio of heat converted to useful power to the heat supplied.
Thermal efficiency
7
The ratio of the actual power of the engine to its ideal power.
Engine efficiency
8
The ratio of the cylinder volumes after and before the combustion process.
Cut-off ratio
9
The position of the piston when it forms the smallest volume in the cylinder.
Head End Dead Center Position
10
The power developed in the engine cylinder as obtained from the pressure in the cylinder.
Indicated power
11
The difference between the maximum and minimum volume.
Clearance Volume
12
What is the primary purpose of an Electric Power Substation?
To switch oi transform voltage levels.
13
What does the term "Load" refer to in the context of electric power?
The power delivered by a machine.
14
Which curve represents the average of daily load curves over a one-month period and is used for rate establishment?
Monthly Load Curve.
15
What is the "Maximur Demand" often referred to as?
Peak Load.
16
What is the purpose of a Load-Duration Curve?
To rearrange data from a chronological load curve.
17
What does "Demand Factor" measure?
The ratio of connected load to maximum demand.
18
What is the "Diversity Factor" in electrical systerns?
The ratio of individual maximum demands to simultaneous maximur demand.
19
What is "Base Load" in the context of elecirical system ?
The minimum load over a given period.
20
What does a Load-Energy Curve indicate?
The total energy for a given load and all values less than that load.
21
What is "Connected Load" defined as?
The sum of all connected equipment.
22
What does the "Annual Load Curve" represent?
The maximum demand over a year.
23
What does "Load Factor" measure?
The ratio of connecied load to maximum demand.
24
What is the "Coincidence Factor"?
The reciprocal of diversity factor.
25
What is the "Plant Factor"?
The ratio of average load on the plant to the aggregate rating of all generating equipment.
26
What is the "Capacity Factor" defined as?
The ratio of average load on a machine to its rating.
27
An engine in which the fuel is burned outside of the power cylinder.
External combustion engine
28
Which of the following compressors is generally used for gas turbines is ____
Axial flow type
29
What type of gas turbine is used in air craft?
Open cycle type
30
An engine in which the fuel is burned directly within the working cylinder.
Internal combustion engine
31
The portion of the piston which extends below the piston pin and serves as a guide for the piston and connecting rod.
Piston skirt
32
Rings located in the grooves of the piston usually near the top and near the bottom
Piston ring
33
Increasing the total amount of charging air in the working cylinder of the engine.
Supercharging
34
In a four stroke Diesel engine, drawing air into the cylinder is what stroke?
Fourth stroke
35
An engine where ignition is caused by heat of compression
Compression ignition engine
36
An engine in which the fuel is burned directly within the working cylinder
Internal Combustion Engine
37
In a gas turbine combined cycle plant, a waste heat boiler is used to
recover heat from exhaust gases
38
overall efficiency of a gas turbine is ____
less than diesel cycle efficiency
39
a temperature is required to ignite the fuel oil?
700 to 900 F