Flat-bottom valve lifters rotate during operation because of the ...

[frankwu]

Flat-bottom valve lifters rotate during operation because of the ________ of the camshaft.
 
  A) Bearings B) Taper of the lobe C) Thrust plate D) Chain tensioner

Question 2

If lift and duration remain constant and the lobe center angle decreases, then ________
 
  A) Valve overlap decreases B) Effective duration increases
  C) Valve overlap increases D) Effective lift increases

[nyrave]

Answer to Question 1

B

Answer to Question 2

C

[frankwu]

TYSM

[dreamfighter72]

Thanks for the timely response, appreciate it