4.1 What is the function of the pressure relief valve on the compression tester?
A - 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 - NSC Mechanical Technology Automotive - Question 4 - 2022 - Paper 1
Step 1
4.1 What is the function of the pressure relief valve on the compression tester?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The pressure relief valve on a compression tester ensures that the tester's maximum pressure is not exceeded. This function is crucial to prevent damage to the tester and ensure safety during the testing process.
Step 2
4.2 While performing wheel balancing, the wheel weight hammer is used to...
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The wheel weight hammer is used to stop the wheel from spinning. This is important as it allows for accurate placement of weights without the wheel moving.
Step 3
4.4 With reference to a four-stroke four-cylinder engine, which cylinder is firing if the valves of cylinder 1 are rocking?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
If the valves of cylinder 1 are rocking in a four-stroke engine, it indicates that cylinder 3 is currently firing. This is due to the firing order and operation of the engine's cycle.
Step 4
4.5 The swept volume is the measuring of the ...
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The swept volume refers to the volume between the Top Dead Center (TDC) and Bottom Dead Center (BDC) of the cylinder. It is essential for understanding the engine's capacity.
Step 5
4.6 Which ONE of the following volumes represents a capacity of 1 litre?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct volume representing a capacity of 1 litre is 1 000 cm³. This is equivalent to one cubic decimeter, which is a standard measurement of volume.
Step 6
4.7 The brake power is the power available ...
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The brake power is the power available at the flywheel. It is a measure of the engine's output before losses due to friction and other factors.
Step 7
4.8 Which ONE of the following is a possible cause of low oil pressure in an engine?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A possible cause of low oil pressure in an engine can be blocked oil passages. This obstruction prevents the proper flow of oil and can lead to significant engine problems.
Step 8
4.9 During a cooling system pressure test, pressure is applied by ...
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
During a cooling system pressure test, pressure is applied by a hydraulic pump. This method ensures accurate testing of the cooling system's integrity.
Step 9
4.10 Which ONE of the following is part of the automatic transmission gearbox?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The turbine is a critical component of the automatic transmission gearbox. It helps in converting the engine's power for the transmission system.
Step 10
4.11 Drive is transmitted from the ... to the output shaft of a double epicyclic gear system.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Drive is transmitted from the sun gear to the output shaft of a double epicyclic gear system. This type of gear arrangement is effective for compact designs.
Step 11
4.12 Which component in an alternator is a rotating electromagnet?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The rotor in an alternator is the component that functions as a rotating electromagnet, playing a key role in generating electricity.
Step 12
4.13 Identify wheel alignment angle W in FIGURE 4.13 below.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The wheel alignment angle W in the figure is known as Camber. This alignment is critical for tire wear and handling.
Step 13
4.14 Which ONE of the following is an air induction sensor?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The air induction sensor referred to here is the MAP sensor (Manifold Absolute Pressure sensor), which is vital for engine management.
