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