Rec-105 Midterm

1. Which scale on the DMM is used for checking battery voltage?

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2.    When checking for resistance, the DMM should be set to____.

• A)    300mv
• B)    Ohms (Ὡ)
• C)    Amps AC
• D)    Volts DC

3.          The maintenance cycle in the charts assumes ______ hours per year usage.

• A)    Charts only recommend service. The interval is up to the customer.
• B)    500
• C)    1000
• D)    100

4. The maintenance cycle in the charts assumes ______ hours per year usage.

• A) Charts only recommend service. The interval is up to the customer.

• B) 500

• C) 1000

• D) 100

5.          The engine specs call for a B7HS-10 NGK spark plug, but someone has installed a BR7HS-10. How will the engine be affected?

• A)    The engine will not be affected.
• B)    The engine could skip and run rough due to excess RFI at the ECU.
• C)    The spark plug will overheat and lead to detonation in the combustion chamber.
• D)    The spark will be “delayed” and the engine will lose power.

6. Which of the following should you do prior to checking the engine oil level on an engine that has been run?

• A) Loosen the fill screw to vent the crankcase.

• B) After running the engine, wait five minutes before pulling the dipstick.

• C) Tilt the engine at least half way up for at least five minutes, then tilt down until level.

• D) Ensure the engine is trimmed all the way down.

7. Which of the following reasons cause engine oil to appear white or milky?

• A) Fuel is blowing by the rings and diluting the oil.

• B) The engine has just been run at a high RPM for an extended amount of time.

• C) The engine has been idling for an extended amount of time.

• D) Water has entered the crankcase and contaminated the engine oil.

8.          After running the outboard in saltwater, which of the following is recommended?

• A)    Flush the engine with fresh water for at least 15 minutes.
• B)    Leave the engine tilted UP.
• C)    Drain the cooling system, and refill it with antifreeze.
• D)    Allow the engine to idle for 10-15 minutes before removing it from saltwater.

9.          When installing the water pump housing on a counter rotation lower unit, the driveshaft must be turned in a _________ direction.

• A)    clockwise
• B)    counter-clockwise
• C)    Do not spin the driveshaft.
• D)    It does not matter which way you turn it.

10. When removing a Yamaha F9.9 lower unit, it must be _________ .

• A) in forward gear

• B) in reverse gear

• C) in neutral

• D) Gear position is not necessary