Which type of balancing is performed at high speeds?
A - NSC Mechanical Technology Automotive - Question 4 - 2021 - Paper 1
Question 4
Which type of balancing is performed at high speeds?
A. Normal balancing
B. Static balancing
C. Dynamic balancing
D. Vibrational balancing
What is the function of ... show full transcript
Worked Solution & Example Answer:Which type of balancing is performed at high speeds?
A - NSC Mechanical Technology Automotive - Question 4 - 2021 - Paper 1
Step 1
Which type of balancing is performed at high speeds?
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 correct answer is B. Static balancing. Static balancing is essential at high speeds to ensure minimal wheel vibration and smooth driving stability.
Step 2
What is the function of the turn-table while performing wheel alignment checks?
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 correct answer is D. To dynamically balance the wheel. The turn-table allows for accurate measurement of wheel alignment and helps adjust the wheel's balance as it rotates.
Step 3
The camshaft rotation for the ignition of the air and fuel mixture in a four-stroke four-cylinder engine, occurs every ... degrees:
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 correct answer is A. 180. In a four-stroke engine, the camshaft completes one full rotation for every two rotations of the crankshaft, translating to a 180-degree ignition interval.
Step 4
Which forced induction system has the most lag?
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 correct answer is A. Non-variable type turbocharger. These systems typically experience greater lag compared to variable types or superchargers as they take longer to spool up.
Step 5
Indicated power can be defined as the ...
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 answer is D. measure to determine the power developed by the burning fuel within the cylinder of an engine. It represents the total power output from the combustion process before losses.
Step 6
A dynamometer measures the ...
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 correct answer is A. theoretical power developed by the engine. Dynamometers assess the power output that an engine is capable of producing.
Step 7
Which of the following is the cause of high levels of hydrocarbon (HC) in an internal combustion 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
The correct answer is A. Too lean mixture. A lean air-fuel mixture can lead to incomplete combustion and higher HC emissions.
Step 8
What will cause a high oil pressure reading in an internal combustion engine?
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 correct answer is A. Defective oil pressure relief valve. If this valve fails, it can lead to excessively high oil pressure readings.
Step 9
Which component in an automatic gearbox directs the oil pressure to select the required gear ratio?
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 correct answer is C. Control valve body. This part regulates the oil pressure needed for shifting gears smoothly.
Step 10
How is the lock-up clutch activated in a torque converter?
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 correct answer is A. By oil pressure. Oil pressure is used to engage the lock-up clutch, improving efficiency.
Step 11
What is the cause of the tire wear indicated in FIGURE 4.12 below?
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 answer is D. Excessive toe-in or toe-out. This type of wear pattern suggests misalignment affecting tire performance.
Step 12
Wheel alignment is performed on a motor vehicle to achieve ...
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 correct answer is D. even tire wear. Proper alignment ensures that the tires wear evenly and enhances vehicle performance.
Step 13
The function of a sensor in an engine-management system is to ...
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 correct answer is B. detect engine operating conditions. Sensors play a critical role in monitoring various engine parameters for optimal performance.
