Reciprocating Engine Quiz

Question 1

the valves stay open too long and close too late; what wouldbe the cause of this?

Answer 1

too small of clearance

Question 2

which is harder, the valve guide or valve stem?

Answer 2

valve stem

Question 3

how much cooler do exhaust valves run which contain sodium?

Answer 3

300 to 400 degrees

Question 4

how does valve timing help keep the exhaust valve cool?

Answer 4

through valve overlap

Question 5

The valve tip And the the Valve face will have what coated on it for better Wear characteristics?

Answer 5

stellite

Question 6

The valve seat performs What operation?

Answer 6

It acts as the contact points for the valves in the cylinder heads

Question 7

Where is The tightest fit in the engine?

Answer 7

Between the exhaust Valve seat and the head

Question 8

What is the opening force for the exhaust valve?

Answer 8

The camshaft lobe through the pushrod and rocker arm

Question 9

What could happen to the valve face the induce pre-ignition?

Answer 9

A feathered Valve

Question 10

when the valve faces are ground to less of a degree than the valve seat, what is that called?

Answer 10

interference fit

Question 11

what is the purpose of an interference fit between the valve seat and the valve face?

Answer 11

provides a more positive seating

Question 12

what type of lifters will you not preform a valve clearance check on?

Answer 12

hydraulic lifters

Question 13

what measuring device will you use to check valve clearance?

Answer 13

feeler or thickness gauge

Question 14

the valves open late and close early; what would be the cause this?

Answer 14

to great of a valve clearance

Question 15

The head of the valve is exposed to what part of the cylinder head?

Answer 15

The combustion chamber

Question 16

What will cause a decrease in valve Overlap?

Answer 16

Too great Of valve clearance

Question 17

During a compression check, if you hear a hissing sound coming from the fuel metering device(carburetor) what is happening?

Answer 17

Leaking intake valve

Question 18

If the Valves will not open far enough or stay open long enough, what is the problem?

Answer 18

To great valve clearance

Question 19

If the valves will not open far enough or stay open long enough, what is the problem?

Answer 19

To great valve clearance

Question 20

What is the valve clearance on systems using hydraulic lifters?

Answer 20

Zero

Question 21

How fast is a camshaft rotate on and opposed engine?

Answer 21

Half the speed of the crankshaft

Question 22

What prevents The valves from bouncing?

Answer 22

The use of multiple Springs to close the valve

Question 23

What reduces the shock on the valve train?

Answer 23

Ramps on the lobes

Question 24

What do radial engines use instead of a camshaft question ?

Answer 24

camring

Question 25

What measurement on the valves requires you to use a radius gauge?

Answer 25

Valve stretch

Question 26

What is the degree value of one tooth on an engine with 4 lobes and 92 Teeth ?

Answer 26

Thirty one point three

Question 27

What is a 0 Lash lifter

Answer 27

Hydraulic Lifter

Question 28

Which type of lifter will require splitting the crankcase?

Answer 28

flanged lifter

Question 29

What are the 2 types of lifters?

Answer 29

Solid and hydraulic

Question 30

Why are pushrods hollow?

Answer 30

To allow oil to flow to the rocker arms

Question 31

When are both valves open?

Answer 31

End of exhaust and Beginning of intake