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88M - Tractor Trailer and HEMTT Exam Questions and Answers
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88M - Tractor Trailer and HEMTT Exam Questions and Answers
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88M - Tractor Trailer and HEMTT ExamQuestions and Answers
During Operation the air pressure range for the M915 is what? - Answers -90-120 PSI
Once an M915 tractor and M872 trailer is couples, an operator should check the
connection by doing what? - Answers -Test brakes with Johnny Bar
During coupling procedures, when would an operator connect the air hoses and light
cables? - Answers -After backing under kingpin, before metallic click
During coupling procedures, an operator must wait a minimum of how many seconds to
ensure landing gear will support trailer weight? - Answers -5 seconds
What are 2 types of air pressure gauges? - Answers -Primary and secondary
What is the cruising range (in miles) on the M915 on a full tank? - Answers -400 miles
What action should the operator take if the voltmeter of the M915 is reading in the red
band? - Answers -Stop and call maintenance
What does the acronym CWS stand for? - Answers -Collision Warning system
On the M915 what is the purpose of the primary air pressure gauge? - Answers -Rear
truck brakes
What must and operator do prior to unlocking the inter-axle differential lock? - Answers -
Slow to 25mph or less
The M915 comes equipped with a ________volt utility outlet - Answers -12
On the M915, when would the low air pressure warning buzzer not sound when below
60psi? - Answers -When truck is set to blackout drive
On the M915, what must an operator take if the transmission oil temp goes into red
band? - Answers -Stop and investigate
What is the process for resetting the air cleaner restriction indicator gauge on M915? -
Answers -Service air cleaner, press yellow reset
, What must an operator do prior to locking the inter-axle differential lock? - Answers -
Come to complete stop
What is the purpose of the 5th wheel slide/switch? - Answers -allows changes to axle
loads or change total length
The M915 can maintain a speed of ___________ on level roads - Answers -65 mph
What is the maximum governed speed (in RPM)? - Answers -2100 RPMs
On the M915, what action should the operator take if the voltmeter is reading in the red
band? - Answers -Notify maintenance
What's the minimum temperature of the engines coolant for normal operation? -
Answers -190 degrees
How many braking functions does a M915 have? - Answers -3
On the M915, for heavy loads or hills, how many cylinders should you use to brake? -
Answers -4 or 6
Which of the following is NOT accomplished prior to coupling procedures - Answers -
back up until you hear click
Which of the following is the correct sequence for uncoupling the IV connectors on the
M915? - Answers -Closest to farthest
On the M915, how many bands are on the voltmeter? - Answers -4
What is the idle speed on the M915? - Answers -600 RPM
On the M915, what must an operator take if the transmission oil temp goes into yellow
band? - Answers -Stop and investigate
On the M915, low air pressure warning buzzer sounds when the air pressure in either
duel system falls below what? - Answers -65 PSI
On the M915, how many cylinders should you use when driving on level roads with light
loads? - Answers -2
On the M915, how many settings are on the engine brake selection switch? - Answers -
3
How far do you lower your landing gear with uncoupling a tractor trailer? - Answers -
Until there is space between the 5th wheel and the trailer
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