MICHIGAN MECHANIC COMPREHENSIVE EXAM
QUESTIONS AND SOLUTIONS RATED A+
✔✔with the radiator cap removed and the engine warmed up and running, you can see
bubbles in the coolant. what would likely cause this to happen? - ✔✔a. too much glcol in
the coolant solution, causing a high boiling point.
b. the thermostat is set to open at too low a temperature. (not correct awnser)
c. the coolant is boiling due to a combustion chamber hot spots.
d. the head gasket is leaking. (correct awnser)
✔✔you have finished grinding an exhaust valve. what should the margin be? - ✔✔a.
about 1/16 inch. (not correct awnser)
b. about 3/16".
c. as narrow as possible.
d. .001"-.003". (possible correct awnser)
✔✔the car has a water pump mounted fan. you notice that the fan blade tips move
between one-eight and one quarter inch back and forth. what does this indicate? - ✔✔a.
a normal condition for the kind of bearings used in water pumps and fan clutches.
b. the belts are too loose.
c. a badly worn water pump bearing. (correct awnser)
d. the fan clutch is leaking. (not correct awnser)
✔✔the best time to check for crankshaft endplay is after: - ✔✔a. torquing the rod
bearing caps.
b. installing the crank sprocket and timing belt. (not correct awnser)
c. torquing the mani bearing caps. (correct awnser)
d. installing the flywheel.
✔✔crankshaft endplay can be checked with: - ✔✔a. an outside micrometer.
b. a dial indicator. (correct awnser)
c. an inside micrometer.
d. a thrust gauge. (not correct awnser)
✔✔the picture below shows a mecahinic measuring: - ✔✔a. valve guide wear.
b. valve concentricity.
c. valve margin. (not correct awnser)
d. valve rotation.
✔✔you are performing a compression test. which one of the following is true? - ✔✔a.
the engine should be below operating temperature.
b. the throttle and choke must be opened fully. (correct awnser)
c. you must add oil to each cylinder before attaching the gauge.
d. you should use the gauge reading on the first compression stroke on each cylinder.
(not correct awnser)
, ✔✔which one of the following is a sae grade 5 bolt? - ✔✔a. a
b. b
c. c (correct awnser)
d. d
✔✔cylinder diameter is important when determining ring end gap. as a rule of thumb, a
3 inch bore would require a ring end gap of approximately: - ✔✔a. .0003"-.0004". (not
correct awnser)
b. .040"-.050".
c. .009"-.012" (correct awnser)
d. .001"-.003"
✔✔piston rings should be checked for fit: - ✔✔a. in the piston ring grooves.
b. in the cylinder.
c. with a dial indicator.
d. both a and b. (correct awnser)
✔✔when putting an engine togeather, you would use short pieces of hose to protect
the: - ✔✔a. rod journals. (correct awnser)
b. cam bearing inserts.
c. rod bearing inserts.
d. main bearing inserts. (not correct awnser)
✔✔which one of the following will cause oil consumption? - ✔✔a. excessive main
bearing clearance. (correct awnser)
b. excessive intake valve to guide clearance.
c. excessive exhaust valve to guide clearance. (not correct awnser)
d. excessive oil pump gear clearance.
✔✔before installing the pistons in a newly honed cast iron block, you should clean the
bores with: - ✔✔a. a rag soaked in gasoline.
b. a dry, lint-free rag. (not correct awnser)
c. a rag soaked in lacquer thinner.
d. soap and warm water. (correct awnser)
✔✔pistons for a v-6 engine are generally: - ✔✔a. shaped to allow for expansion from
heat.
b. perfectly round.
c. interchangeable from one cylinder bank to the other. (correct awnser)
d. designed to be installed with the identifying marks towards the outside of the cylinder
bank. (not correct awnser)
✔✔refer to the drawing and specifications in the picture. rod journal out-of-round is the
differnece between the journal measurements at: - ✔✔a. e and f.
QUESTIONS AND SOLUTIONS RATED A+
✔✔with the radiator cap removed and the engine warmed up and running, you can see
bubbles in the coolant. what would likely cause this to happen? - ✔✔a. too much glcol in
the coolant solution, causing a high boiling point.
b. the thermostat is set to open at too low a temperature. (not correct awnser)
c. the coolant is boiling due to a combustion chamber hot spots.
d. the head gasket is leaking. (correct awnser)
✔✔you have finished grinding an exhaust valve. what should the margin be? - ✔✔a.
about 1/16 inch. (not correct awnser)
b. about 3/16".
c. as narrow as possible.
d. .001"-.003". (possible correct awnser)
✔✔the car has a water pump mounted fan. you notice that the fan blade tips move
between one-eight and one quarter inch back and forth. what does this indicate? - ✔✔a.
a normal condition for the kind of bearings used in water pumps and fan clutches.
b. the belts are too loose.
c. a badly worn water pump bearing. (correct awnser)
d. the fan clutch is leaking. (not correct awnser)
✔✔the best time to check for crankshaft endplay is after: - ✔✔a. torquing the rod
bearing caps.
b. installing the crank sprocket and timing belt. (not correct awnser)
c. torquing the mani bearing caps. (correct awnser)
d. installing the flywheel.
✔✔crankshaft endplay can be checked with: - ✔✔a. an outside micrometer.
b. a dial indicator. (correct awnser)
c. an inside micrometer.
d. a thrust gauge. (not correct awnser)
✔✔the picture below shows a mecahinic measuring: - ✔✔a. valve guide wear.
b. valve concentricity.
c. valve margin. (not correct awnser)
d. valve rotation.
✔✔you are performing a compression test. which one of the following is true? - ✔✔a.
the engine should be below operating temperature.
b. the throttle and choke must be opened fully. (correct awnser)
c. you must add oil to each cylinder before attaching the gauge.
d. you should use the gauge reading on the first compression stroke on each cylinder.
(not correct awnser)
, ✔✔which one of the following is a sae grade 5 bolt? - ✔✔a. a
b. b
c. c (correct awnser)
d. d
✔✔cylinder diameter is important when determining ring end gap. as a rule of thumb, a
3 inch bore would require a ring end gap of approximately: - ✔✔a. .0003"-.0004". (not
correct awnser)
b. .040"-.050".
c. .009"-.012" (correct awnser)
d. .001"-.003"
✔✔piston rings should be checked for fit: - ✔✔a. in the piston ring grooves.
b. in the cylinder.
c. with a dial indicator.
d. both a and b. (correct awnser)
✔✔when putting an engine togeather, you would use short pieces of hose to protect
the: - ✔✔a. rod journals. (correct awnser)
b. cam bearing inserts.
c. rod bearing inserts.
d. main bearing inserts. (not correct awnser)
✔✔which one of the following will cause oil consumption? - ✔✔a. excessive main
bearing clearance. (correct awnser)
b. excessive intake valve to guide clearance.
c. excessive exhaust valve to guide clearance. (not correct awnser)
d. excessive oil pump gear clearance.
✔✔before installing the pistons in a newly honed cast iron block, you should clean the
bores with: - ✔✔a. a rag soaked in gasoline.
b. a dry, lint-free rag. (not correct awnser)
c. a rag soaked in lacquer thinner.
d. soap and warm water. (correct awnser)
✔✔pistons for a v-6 engine are generally: - ✔✔a. shaped to allow for expansion from
heat.
b. perfectly round.
c. interchangeable from one cylinder bank to the other. (correct awnser)
d. designed to be installed with the identifying marks towards the outside of the cylinder
bank. (not correct awnser)
✔✔refer to the drawing and specifications in the picture. rod journal out-of-round is the
differnece between the journal measurements at: - ✔✔a. e and f.
