chapter. 1 reciprocating engine

Question 1

what is purpose of dynamic damper on crankshafts

Answer 1

reduce engine vibration

Question 2

what type of bearing are found on recip engine

Answer 2

plain, ball, roller

Question 3

are the connecting rods used in each cylinder of radial engine the same?

Answer 3

no radial engine use master and articulating rod assemblises

Question 4

name different type of piston rings

Answer 4

oil control, compression, oil scraper

Question 5

where should piston ring gap be installed relative each other

Answer 5

compression ring gaps should be staggered so that they don’t align. this prevent excessive blow-by

Question 6

what could result from incorrectly installed piston rings

Answer 6

excessive oil consumption

Question 7

what purpose do oil control rings serve

Answer 7

they regulate thickness of oil film on cylinder wall

Question 8

what is used to help prevent valve surge or floating in aircraft engine

Answer 8

two or more spring are used on each valve

Question 9

on engine equipped with hydraulic valve lifter, what should the running valve clearance be?

Answer 9

zero

Question 10

what is purpose of valve overlap

Answer 10

allow better volumetric efficiency and lower cylinder temp