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88M - Tractor Trailer and HEMTT Questions and Answers (100% Pass)
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88M - Tractor Trailer and HEMTT Questions and Answers (100% Pass)
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1|Page | © copyright 2024/2025 | Grade A+88M - Tractor Trailer and HEMTT
Questions and Answers (100% Pass)
During Operation the air pressure range for the M915 is what?
✓ 90-120 PSI
Once an M915 tractor and M872 trailer is couples, an operator should check
the connection by doing what?
✓ Test brakes with Johnny Bar
During coupling procedures, when would an operator connect the air hoses
and light cables?
✓ 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?
✓ 5 seconds
What are 2 types of air pressure gauges?
✓ Primary and secondary
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
What is the cruising range (in miles) on the M915 on a full tank?
✓ 400 miles
What action should the operator take if the voltmeter of the M915 is reading in
the red band?
✓ Stop and call maintenance
What does the acronym CWS stand for?
✓ Collision Warning system
On the M915 what is the purpose of the primary air pressure gauge?
✓ Rear truck brakes
What must and operator do prior to unlocking the inter-axle differential lock?
✓ Slow to 25mph or less
The M915 comes equipped with a ________volt utility outlet
✓ 12
Master01 | October, 2024/2025 | Latest update
, 1|Page | © copyright 2024/2025 | Grade A+
On the M915, when would the low air pressure warning buzzer not sound
when below 60psi?
✓ When truck is set to blackout drive
On the M915, what must an operator take if the transmission oil temp goes
into red band?
✓ Stop and investigate
What is the process for resetting the air cleaner restriction indicator gauge on
M915?
✓ Service air cleaner, press yellow reset
What must an operator do prior to locking the inter-axle differential lock?
✓ Come to complete stop
What is the purpose of the 5th wheel slide/switch?
✓ allows changes to axle loads or change total length
The M915 can maintain a speed of ___________ on level roads
✓ 65 mph
Master01 | October, 2024/2025 | Latest update
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