UTI MMi Yamaha quiz 2 questions verified correct answers
2026/2027 version
The timing chain on a f225 v6 engine uses the force of a spring to maintain its tension.
After the engine is started- correct answer >>>Oil is pumped into the tensioner and the
resulting pressure causes the tension to increase.
The timing belt should be checked- correct answer >>>Every 100 hrs or 6 months of
operation. Replace timing belt if slack is over spec or if the belt is cracked; worn or
damaged.
The ionic combustion sensor- correct answer >>>Continuously monitor combustion
conditions and adjusts ignition timing
The variable camshaft timing is used- correct answer >>>To achieve increased torque
and higher output. It is used on the F250 and V8 (350)
A code 01 means- correct answer >>>there is no malfunction. It displays on the
tachometer for 3 seconds before automatically returning to monitor display
If the yellow DEC (digital electronic control) system has a yellow "warning" LED, it
indicates that- correct answer >>>There is no communication between the engine ECU
and the remote control ECU. (The controls)
Over revolution control functions by- correct answer >>>Cutting ignition
Below 2000 RPMs engine overheating control engages- correct answer >>>After 75
seconds, unless the thermoswitch engages at 248 degrees. Then it doesn't wait.
Above 2000 rpm's over heat control engages- correct answer >>>After 25 seconds,
unless the engine is over 248 degrees. If it is no wait period.
What is the purpose of HDPI partial cylinder drop?- correct answer >>>Reduce noise
and vibration
A small AWG cable may cause- correct answer >>>A fire
The high pressure pump pumps fuel to- correct answer >>>725 PSI
The injector driver voltage is- correct answer >>>80VDC
Fouled 02 sensors can cause- correct answer >>>Any complaint the customer could
have. Rough idle, poor mid range operation, loss of WOT RPM, surging, unable to
obtain WOT operation, increased fuel consumption, dropping cylinders, excessive
smoking.
2026/2027 version
The timing chain on a f225 v6 engine uses the force of a spring to maintain its tension.
After the engine is started- correct answer >>>Oil is pumped into the tensioner and the
resulting pressure causes the tension to increase.
The timing belt should be checked- correct answer >>>Every 100 hrs or 6 months of
operation. Replace timing belt if slack is over spec or if the belt is cracked; worn or
damaged.
The ionic combustion sensor- correct answer >>>Continuously monitor combustion
conditions and adjusts ignition timing
The variable camshaft timing is used- correct answer >>>To achieve increased torque
and higher output. It is used on the F250 and V8 (350)
A code 01 means- correct answer >>>there is no malfunction. It displays on the
tachometer for 3 seconds before automatically returning to monitor display
If the yellow DEC (digital electronic control) system has a yellow "warning" LED, it
indicates that- correct answer >>>There is no communication between the engine ECU
and the remote control ECU. (The controls)
Over revolution control functions by- correct answer >>>Cutting ignition
Below 2000 RPMs engine overheating control engages- correct answer >>>After 75
seconds, unless the thermoswitch engages at 248 degrees. Then it doesn't wait.
Above 2000 rpm's over heat control engages- correct answer >>>After 25 seconds,
unless the engine is over 248 degrees. If it is no wait period.
What is the purpose of HDPI partial cylinder drop?- correct answer >>>Reduce noise
and vibration
A small AWG cable may cause- correct answer >>>A fire
The high pressure pump pumps fuel to- correct answer >>>725 PSI
The injector driver voltage is- correct answer >>>80VDC
Fouled 02 sensors can cause- correct answer >>>Any complaint the customer could
have. Rough idle, poor mid range operation, loss of WOT RPM, surging, unable to
obtain WOT operation, increased fuel consumption, dropping cylinders, excessive
smoking.
