4.1 Which ONE of the following pieces of equipment is used to set the wheel alignment of a motor vehicle?
A Pressure tester?
B Torsion tester?
C Bubble gauge?
D Wheel gauge?
4.2 What is the purpose of a wheel balancer?
To balance …
A the angles of a motor vehicle
B the wheels for static and dynamic balance
C the steering control for better road grip
D engine torque delivered to the wheels
4.3 Identify the type of supercharger shown in FIGURE 4.3 below - NSC Mechanical Technology Automotive - Question 4 - 2018 - Paper 1
Question 4
4.1 Which ONE of the following pieces of equipment is used to set the wheel alignment of a motor vehicle?
A Pressure tester?
B Torsion tester?
C Bubble gauge?
D ... show full transcript
Worked Solution & Example Answer:4.1 Which ONE of the following pieces of equipment is used to set the wheel alignment of a motor vehicle?
A Pressure tester?
B Torsion tester?
C Bubble gauge?
D Wheel gauge?
4.2 What is the purpose of a wheel balancer?
To balance …
A the angles of a motor vehicle
B the wheels for static and dynamic balance
C the steering control for better road grip
D engine torque delivered to the wheels
4.3 Identify the type of supercharger shown in FIGURE 4.3 below - NSC Mechanical Technology Automotive - Question 4 - 2018 - Paper 1
Step 1
4.1 Which ONE of the following pieces of equipment is used to set the wheel alignment of a motor vehicle?
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Answer
The correct answer is D: Wheel gauge. A wheel gauge is specifically designed for adjusting and measuring the alignment angles on a motor vehicle.
Step 2
4.2 What is the purpose of a wheel balancer?
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Answer
The correct answer is B: the wheels for static and dynamic balance. A wheel balancer ensures that the weight is evenly distributed around the wheel, reducing vibration and enhancing the vehicle's performance.
Step 3
4.3 Identify the type of supercharger shown in FIGURE 4.3 below.
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Answer
The correct answer is C: Centrifugal supercharger. This type utilizes a rotating impeller to force air into the engine, enhancing performance and efficiency.
Step 4
4.5 The power of an engine may be defined as …
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Answer
The correct answer is B: a force that overcomes resistance and causes movement. Engine power is essentially work done over time, measured in Watts or horsepower.
Step 5
4.6 What will be the brake power of an engine if the engine develops torque of 180 Nm at 3000 r/min?
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Answer
The correct answer is C: 56,55 kW. Brake power can be calculated using the formula:
ext{Power (kW)} = rac{ ext{Torque (Nm)} imes ext{RPM}}{9549}
Substituting the given values:
ext{Power} = rac{180 imes 3000}{9549} hickapprox 56,55 ext{ kW}
Step 6
4.7 The relationship between the total volume of a cylinder when the piston is at bottom dead centre to the combustion chamber volume in the cylinder is known as the …
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Answer
The correct answer is A: compression ratio. This ratio indicates the efficiency of an engine's combustion process.
Step 7
4.8 Which device controls the modern electronic automatic transmission of a vehicle?
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Answer
The correct answer is A: Electronic control unit. This unit manages the shifting of gears in an automatic transmission by processing data from various sensors.
Step 8
4.9 What is the effect of the gear ratio on the road speed of a motor vehicle?
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Answer
The correct answer is C: A higher gear ratio increases the road speed. Higher gear ratios allow for greater speed but can reduce the engine's torque.
Step 9
4.10 What type of gear train is shown in FIGURE 4.10 below?
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Answer
The correct answer is A: Epicyclic gear train. This type allows for compact design and varying gear ratios within a smaller space.
Step 10
4.11 What is the effect of a large positive caster angle on the wheels of a vehicle?
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Answer
The correct answer is A: The pressure increases. A larger positive caster angle helps maintain directional stability.
Step 11
4.12 What is the definition of static balance of a wheel and tyre assembly? …
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Answer
The correct answer is D: Equal distribution of all weight. Static balancing ensures that the weight is evenly distributed around the wheel assembly.
Step 12
4.13 Which exhaust emission control device is used to convert toxic gases and pollutants to less toxic gases from the exhaust gases of an internal combustion engine?
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Answer
The correct answer is A: Catalytic converter. This device facilitates chemical reactions that reduce harmful emissions.
Step 13
4.14 Which ONE of the following safety measures must be taken into consideration when testing or repairing an alternator?
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Answer
The correct answer is A: Always connect the positive and negative cables of the tester to the relevant poles of the battery. This step prevents potential damage to electrical components.
