Diesel qiuz 2.

1.  A diesel engine operates as a?
a. 2 stroke.
b. 4 stroke.
c. Both A&B.
d. 8 stroke.

2.  On a multicylinder diesel 4 cycle engine, all cylinders complete their cycle in ____  revolutions of the crankshaft?
a. 1.
b. 2.
c. 3.
d. 4.

3.  On a 4 cylinder, 4 stroke diesel, the crankshaft interval between powerstrokes is?
a. 90 deg.
b. 180 deg.
c. 295.5 deg.
d. 45 deg.

4.  On a 4 stroke diesel, the intake valve?
a. begins to open before TDC.
b. closes before BDC.
c. closes after BDC.
d. both A&C.

5.  On a 4 stroke diesel, injection of fuel begins?
a. on the exhaust stroke.
b. on the compression stroke.
c. a few degrees before TDC.
d. both B&C.

6.  Valve overlap is?
a. when both intake and exhaust are barely open.
b. both intake and exhaust are closed.
c. occurs at BDC.
d. both A&C.

7.  On a 4 stroke diesel, the exhaust valve closes?
a. before TDC.
b. after BDC.
c. after TDC.
d. both A&C.

8.  A naturally aspirated engine?
a. has no turbo.
b. has 1 supercharger per cylinder.
c. works best at high altitudes.
d. gets better fuel economy than a turbocharged engine.

9.  Propane laced intake air on a diesel will?
a. burn hotter.
b. burn cleaner.
c. burn longer.
d. all of the above.

10.  A naturally aspirated engine has a lower compression ratio than a turbocharged engine.
a. true.
b. false.









answers: c,d,b,d,d,a,c,a,d,b.

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