NSC Mechanical Technology Automotive CI engines, injectors, and valve assemblies: 4.1 Which ONE of the following s

Question

4.1 Which ONE of the following safety procedures relates to the cylinder leakage tester?
A  Use water to remove dust around the spark-plug area.
B  Clean the oil-filler cap.
C  Exceed the prescribed pressure in the cylinder.
D  The tester must be well tightened until no hissing sounds can be heard.

4.2 Which ONE of the following tests indicates the condition of an engine's piston rings?
A  Cylinder leakage test
B  Gas analysing test
C  Fuel test
D  Torsion test

4.3 The supercharger is the most efficient and common of all forced-induction systems.
A  Twin screw
B  Vane
C  Centrifugal
D  Roots

4.4 What do you understand by the term boost with regard to turbochargers?
A  The pressure accumulated by the turbocharger in the inlet manifold
B  Where the blower is placed before the carburetor
C  The increase in manifold pressure that is generated in the inlet manifold
D  Where the blower is placed after the carburetor

4.5 What is the unit for turning moment?
A  N/m²
B  N.m
C  N².m²
D  N/m.m

4.6 Which ONE of the following methods is used to raise the compression ratio of an internal combustion engine?
A  Adjust the valve timing on the belt.
B  Fit a thinner gasket between the cylinder block and the cylinder head.
C  Fit a thicker gasket between the cylinder block and the cylinder head.
D  Make sure that there are no holes in the exhaust system.

4.7 Which ONE of the following safety measures must be considered while setting up the oil pressure tester? Make sure that …
A  The test fits tightly to give an accurate reading.
B  The adapter fitted to the exhaust system fits well.
C  You do not open the radiator cap when the engine is hot.
D  You run the engine until both valves are closed.

4.8 What will be the mechanical efficiency of an engine, if the brake power of the engine is 66 kW and the indicated power is 75 kW?
A  98%
B  14,7%
C  88%
D  113,84%

4.9 What will be the gear ratio of a gear system, if the driver gear has 25 teeth and the driven gear 100?
A  1 : 4
B  4 : 1
C  1 : 25
D  25 : 1

4.10 The ... system is used to obtain different gear ratios between the driver and driven gear members in an automatic transmission.
A  straight gear
B  epicyclic gear
C  rack and pinion
D  brake gear

4.11 What do you understand by the term torsional vibration in relation to

4.13 Which ONE of the following methods is used to increase the output frequency of the alternator?
A  Increase the number of turns of the wire on the stationary coil.
B  Increase the number of turns of the wire on the rotating coil.
C  Decrease the magnetic field.
D  Decrease the rotational frequency at which the magnet rotates.

4.14 What does it mean if a fuel pump is referred to as a wet pump? It means ...

that the pump feeds the fuel from the fuel tank at predetermined pressure.
B  less discharge of pulsating fuel.
C  that the fuel quantity is controlled precisely by the pressure.
D  the electrical motor operates immersed in the fuel.

4.1 Which ONE of the following safety procedures relates to the cylinder leakage tester? A Use water to remove dust around the spark-plug area - NSC Mechanical Technology Automotive - Question 4 - 2019 - Paper 1

Worked Solution & Example Answer:4.1 Which ONE of the following safety procedures relates to the cylinder leakage tester? A Use water to remove dust around the spark-plug area - NSC Mechanical Technology Automotive - Question 4 - 2019 - Paper 1

Which ONE of the following safety procedures relates to the cylinder leakage tester?

Which ONE of the following tests indicates the condition of an engine's piston rings?

The supercharger is the most efficient and common of all forced-induction systems.

What do you understand by the term boost with regard to turbochargers?

What is the unit for turning moment?

Which ONE of the following methods is used to raise the compression ratio of an internal combustion engine?

Which ONE of the following safety measures must be considered while setting up the oil pressure tester? Make sure that …

What will be the mechanical efficiency of an engine, if the brake power of the engine is 66 kW and the indicated power is 75 kW?

What will be the gear ratio of a gear system, if the driver gear has 25 teeth and the driven gear 100?

The ... system is used to obtain different gear ratios between the driver and driven gear members in an automatic transmission.

What do you understand by the term torsional vibration in relation to

Which ONE of the following methods is used to increase the output frequency of the alternator?

What does it mean if a fuel pump is referred to as a wet pump? It means ...

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