MLR Engine Repair FINAL

1. All of the following are in the engine block EXCEPT:

• A. Crankshaft

• B. Connecting rods

• C. Heater core

• D. Pistons

2. Technician A says that the camshaft must always be located in the engine block. Technician B says the block is machined with passages for coolant circulation called water jackets. Who is correct?

 

• A. Technician A only

• B. Technician B only

• C. Both Technician A and B

• D. Neither Technician A nor B

3. The round holes machined into the block for the pistons to travel up and down in are called:

• A. Combustion chambers

• B. Bores

• C. Water jackets

• D. None of the above

4. What component is forced up into cylinder bores by the crankshaft?

• A. Camshaft

• B. Crankshaft

• C. Intake valve

• D. Piston

5. What is the bottom of piston travel called?

 

 

• A. Top dead center (TDC)

• B. Center piston travel

• C. Piston reach

• D. Bottom dead center (BDC)

6. Which piston ring prevents combustion pressure from entering the crankcase?

• A. Compression rings

• B. Coolant rings

• C. High pressure “O” rings

•  D. Oil control rings

7. Technician A says that the larger end of the connecting rod is attached to the crankshaft through rod bearing inserts. Technician B says connecting rods connect each rod to the camshaft. Who is correct?

• A. Technician A only

• B. Technician B only

• C. Both Technician A and B

• D. Neither Technician A nor B

8. All of the following components are connected to the crankshaft EXCEPT:

 

• A. Counterweights

• B. Flywheel

• C. Harmonic balancer

• D. Water pump

9. What is the function of an Oil Bypass Valve?

• A. To open at high speed to reduce oil pressure

• B. To allow oil to drain from the cylinder heads back into the crank case

• C. To open in the event of a clogged filter

• D. To redirect oil through the cooling system and control its temperature

10. Which of these is currently the most common engine type?

• A. Slant

• B. Inline

• C. Rotary

• D. Boxer