4.1 What is the function of the pressure relief valve on the compression tester?
A Ensures that the tester's maximum pressure is not exceeded
B Reveals the condition of the engine
C Relieves pressure in the tester in preparation for the next test
D Prevents a loss of pressure
4.2 While performing wheel balancing, the wheel weight hammer is used to.. - NSC Mechanical Technology Automotive - Question 4 - 2022 - Paper 1
Question 4
4.1 What is the function of the pressure relief valve on the compression tester?
A Ensures that the tester's maximum pressure is not exceeded
B Reveals the conditi... show full transcript
Worked Solution & Example Answer:4.1 What is the function of the pressure relief valve on the compression tester?
A Ensures that the tester's maximum pressure is not exceeded
B Reveals the condition of the engine
C Relieves pressure in the tester in preparation for the next test
D Prevents a loss of pressure
4.2 While performing wheel balancing, the wheel weight hammer is used to.. - NSC Mechanical Technology Automotive - Question 4 - 2022 - Paper 1
Step 1
What is the function of the pressure relief valve on the compression tester?
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Answer
The pressure relief valve on a compression tester prevents a loss of pressure. This function ensures that the tester operates effectively without exceeding its maximum pressure limit, thereby protecting the tester and ensuring accurate readings.
Step 2
While performing wheel balancing, the wheel weight hammer is used to...
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Answer
The wheel weight hammer is used to stop the wheel from spinning. This is crucial during the balancing process to ensure that the weights are added correctly and the wheel can stabilize.
Step 3
With reference to a four-stroke four-cylinder engine, which cylinder is firing if the valves of cylinder 1 are rocking?
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Answer
If the valves of cylinder 1 are rocking, this indicates that cylinder 3 is firing. This is due to the firing order and operation of a four-stroke engine.
Step 4
The swept volume is the measuring of the ...
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Answer
The swept volume is the measuring of the volume between the top dead center (TDC) and bottom dead center (BDC) of the cylinder. It represents the space that is swept by the piston during its stroke.
Step 5
Which ONE of the following volumes represents a capacity of 1 litre?
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Answer
The volume that represents a capacity of 1 litre is 1 000 cm³. This is the standard conversion where 1 litre is equivalent to 1 000 cubic centimeters.
Step 6
The brake power is the power available ...
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The brake power is the power available at the flywheel. It represents the usable power that can be utilized for work, accounting for losses in the engine itself.
Step 7
Which ONE of the following is a possible cause of low oil pressure in an engine?
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Answer
A possible cause of low oil pressure in an engine is blocked oil passages. This can lead to insufficient oil flow and inadequate lubrication of engine components.
Step 8
During a cooling system pressure test, pressure is applied by ...
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During a cooling system pressure test, pressure is applied by a hand-operated pump. This method allows for controlled pressure application to test the integrity of the cooling system.
Step 9
Which ONE of the following is part of the automatic transmission gearbox?
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Answer
The part of the automatic transmission gearbox is the turbine. This component is essential for transferring power within the transmission.
Step 10
Drive is transmitted from the ... to the output shaft of a double epicyclic gear system.
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Answer
Drive is transmitted from the sun gear to the output shaft of a double epicyclic gear system. The configuration of epicyclic gearing allows for efficient power transmission.
Step 11
Which component in an alternator is a rotating electromagnet?
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The rotating electromagnet in an alternator is the rotor. It plays a critical role in generating electrical power.
Step 12
Identify wheel alignment angle W in FIGURE 4.13 below.
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The wheel alignment angle W in FIGURE 4.13 is toe-out. This configuration affects how the wheels align during driving.
Step 13
Which ONE of the following is an air induction sensor?
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The air induction sensor is the MAP sensor (Manifold Absolute Pressure sensor). It monitors the pressure in the intake manifold.
