(CPL) Commercial Pilot Licence Practice Test
CPL - Commercial Pilot Licence FREE CPL Aircraft General Knowledge Questions and Answers
The valves in a four-stroke engine open and close:
Select your answer
A
precisely on TDC and BDC
B
exactly 55° after TDC and BDC
C
exactly 15° after TDC and BDC
D
none of these
Hint