10.1 Name TWO types of impulse turbines. 10.2 FIGURE 10.1 shows a water turbine driving a generator. Answer the questions that follow. 10.2.1 Identify the type of turbine shown in FIGURE 10.1 above. 10.2.2 Label A–F. 10.2.3 State TWO advantages of the turbine shown in FIGURE 10.1 above. 10.3 State TWO advantages of EACH of the following: 10.3.1 Supercharger. 10.3.2 Steam turbine. 10.3.3 Gas turbine. 10.4 Explain the term turbo lag in terms of a turbocharger.

NSC Mechanical Technology Welding and Metalwork Characteristics and uses: 10.1 Name TWO types of impulse t

10.1 Name TWO types of impulse turbines - NSC Mechanical Technology Welding and Metalwork - Question 10 - 2017 - Paper 1

Question 10

10.1 Name TWO types of impulse turbines. 10.2 FIGURE 10.1 shows a water turbine driving a generator. Answer the questions that follow. 10.2.1 Identify the type of ... show full transcript

Worked Solution & Example Answer:10.1 Name TWO types of impulse turbines - NSC Mechanical Technology Welding and Metalwork - Question 10 - 2017 - Paper 1

Step 1

Name TWO types of impulse turbines

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114 rated

Answer

Pelton turbine
Turgo turbine

Step 2

Identify the type of turbine shown in FIGURE 10.1 above

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Answer

The turbine shown in FIGURE 10.1 is a water turbine.

Step 3

Label A–F

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Answer

A – Wicked gate B – Rotor C – Stator D – Shaft E – Water-flow F – Blades

Step 4

State TWO advantages of the turbine shown in FIGURE 10.1 above

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Answer

Low maintenance
No need for lubrication

Step 5

State TWO advantages of EACH of the following:

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Answer

Supercharger:

Increases the output power of the engine.
Increases the volumetric efficiency of the engine.

Steam turbine:

It is compact.
Higher speeds can be obtained as compared to internal combustion engines.

Gas turbine:

Very high power to weight ratio.
Moves in one direction only, with far less vibration.

Step 6

Explain the term turbo lag in terms of a turbocharger

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Answer

Turbo lag is the delay between pushing on the accelerator and feeling turbo kick in, which occurs as the turbo needs time to spool up before delivering increased power.

10.1 Name TWO types of impulse turbines - NSC Mechanical Technology Welding and Metalwork - Question 10 - 2017 - Paper 1

Worked Solution & Example Answer:10.1 Name TWO types of impulse turbines - NSC Mechanical Technology Welding and Metalwork - Question 10 - 2017 - Paper 1

Name TWO types of impulse turbines

Identify the type of turbine shown in FIGURE 10.1 above

Label A–F

State TWO advantages of the turbine shown in FIGURE 10.1 above

State TWO advantages of EACH of the following:

Explain the term turbo lag in terms of a turbocharger

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