#1
Which component controls the opening and closing of valves in an engine?
Camshaft
ExplanationThe camshaft controls valve timing.
#2
What is the function of the camshaft in an engine?
To control the valve timing
ExplanationCamshaft regulates valve timing.
#3
In a DOHC engine, how many camshafts are there?
Two
ExplanationDOHC: two camshafts.
#4
Which of the following components is responsible for transmitting motion from the camshaft to the valves?
Rocker arms
ExplanationRocker arms transmit motion to valves.
#5
What is the primary function of a camshaft in an engine?
To control the timing of intake and exhaust valves
ExplanationCamshaft controls valve timing.
#6
Which timing system adjusts the valve timing continuously based on engine conditions?
Variable Valve Timing (VVT)
ExplanationVVT adjusts valve timing dynamically.
#7
What is the purpose of the camshaft position sensor?
To detect the position of the camshaft
ExplanationDetects camshaft position.
#8
What is valve overlap in an engine?
The time period when both intake and exhaust valves are open
ExplanationValve overlap: both valves open.
#9
What does the term 'valve timing' refer to in an engine?
The angle at which the valves open and close
ExplanationValve timing: valve open/close angle.
#10
Which of the following is NOT a type of camshaft drive system?
Direct injection
ExplanationDirect injection isn't a camshaft drive.
#11
Which of the following is NOT a benefit of variable valve timing (VVT)?
Increased engine noise
ExplanationVVT doesn't increase engine noise.
#12
What does it mean if an engine has 'retarded' valve timing?
The valve timing is too slow
ExplanationRetarded timing: slow valve operation.
#13
Which type of valve timing system adjusts the duration, timing, and lift of the valves independently?
Variable Valve Timing and Lift (VVT-L)
ExplanationVVT-L independently adjusts valve duration, timing, and lift.