Automotive engine variable valve timing
Quiz by Cliff Kincaid
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22 questions
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- Q1What is the purpose of automotive engine variable valve timing?To increase engine noiseTo improve tire tractionTo optimize engine performance and fuel efficiencyTo reduce the number of cylinders30s
- Q2How does automotive engine variable valve timing affect engine performance?It decreases engine power at all RPMsIt allows for better torque at low RPMs and improved horsepower at high RPMsIt has no effect on engine performanceIt reduces fuel efficiency at high RPMs30s
- Q3How does automotive engine variable valve timing contribute to fuel efficiency?By requiring more frequent refuelingBy increasing emissions and polluting the environmentBy decreasing engine efficiency and wasting fuelBy improving combustion efficiency and reducing fuel consumption30s
- Q4What is the function of the camshaft in an automotive engine with variable valve timing?To adjust the tire pressureTo monitor the fuel levelTo control the opening and closing of the intake and exhaust valvesTo regulate the engine temperature30s
- Q5What component in an engine controls the timing of variable valve timing activation?The steering wheelThe engine control unit (ECU)The brake pedalThe windshield wipers30s
- Q6How does variable valve timing affect engine emissions?It increases emissions by burning more fuelIt can help reduce harmful emissions by improving combustion efficiencyIt only affects engine noise levelsIt has no impact on emissions30s
- Q7What is the primary benefit of variable valve timing in automotive engines?To enhance both performance and fuel efficiencyTo increase engine emissionsTo lower overall engine reliabilityTo decrease engine power output30s
- Q8How does variable valve timing help in improving engine responsiveness?By optimizing the timing of valve opening and closing for quicker engine responseBy increasing the engine's weight for better stabilityBy limiting the RPM range of the engineBy reducing the overall engine power output30s
- Q9What is the purpose of variable valve timing in an automotive engine?To increase engine weight for better tractionTo limit engine power output at low speedsTo decrease fuel efficiency at high speedsTo optimize engine performance across a range of speeds30s
- Q10How does variable valve timing in an engine contribute to smoother idling?By increasing engine noise levels at idleBy limiting the amount of air intake at idleBy adjusting valve timing to provide better air and fuel mixture at low speedsBy decreasing engine stability at low RPMs30s
- Q11What is the purpose of engine oil in a car?To lubricate moving parts and reduce frictionTo improve fuel efficiencyTo increase engine noiseTo clean the windshield30s
- Q12Which of the following is a common type of automotive engine oil?SyntheticCoconutMineralVegetable30s
- Q13How often should engine oil be changed in a typical car?Every 25,000 milesEvery 1,000 milesEvery 15,000 milesEvery 5,000 to 7,500 miles30s
- Q14What is the viscosity rating of engine oil used in colder climates?20W-5010W-4015W-505W-3030s
- Q15What does the term 'API' stand for in relation to engine oils?Antifreeze Preservation IndicatorAmerican Petroleum InstituteAdvanced Oil ProtectionAutomated Performance Index30s