10.1 Name ONE type of impulse water turbine - NSC Mechanical Technology Automotive - Question 10 - 2017 - Paper 1
Question 10
10.1 Name ONE type of impulse water turbine.
10.2 Define the run-away speed of a water turbine.
10.3 FIGURE 10.3 below shows a water turbine driving a generator. A... show full transcript
Worked Solution & Example Answer:10.1 Name ONE type of impulse water turbine - NSC Mechanical Technology Automotive - Question 10 - 2017 - Paper 1
Step 1
Name ONE type of impulse water turbine.
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Answer
One type of impulse water turbine is the Pelton turbine.
Step 2
Define the run-away speed of a water turbine.
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Answer
The run-away speed of a water turbine is its speed at full flow with no shaft load.
Step 3
Identify the type of turbine shown in FIGURE 10.3.
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Answer
The type of turbine shown in FIGURE 10.3 is a Reaction turbine.
Step 4
Label parts A–F.
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Answer
A. Wicket gate
B. Rotor
C. Stator
D. Shaft
E. Water flow
F. Blades
Step 5
State THREE advantages of the turbine shown in FIGURE 10.3.
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Answer
The water turbine blades continue to turn on cloudy windless days unlike sun and wind systems.
No water is consumed in this process, making it environmentally friendly with no pollution.
It is more reliable and can be mounted vertically to take up less space.
Step 6
State the main function of turbochargers and superchargers used on internal combustion engines.
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Answer
The main function of turbochargers and superchargers is to increase the volumetric efficiency of an internal combustion engine.
Step 7
Name the type of compressor used in a turbocharger.
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Answer
The type of compressor used in a turbocharger is a Centrifugal compressor.
Step 8
How is a turbocharger driven?
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A turbocharger is driven by exhaust gases.
Step 9
State ONE advantage of a turbocharger.
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One advantage of a turbocharger is that it doesn't draw power from the engine, as it is driven by exhaust gases.
Step 10
State TWO advantages of a steam turbine.
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Answer
A steam turbine is compact and has no lubrication needed.
It is more economical as it converts thermal energy into mechanical energy efficiently.
