Red Seal Exam UPDATED ACTUAL
Questions and CORRECT Answers
What does channel mean? - CORRECT ANSWER✔✔- It equals the number of modulators.
What is comfortable temperature and humidity? - CORRECT ANSWER✔✔- 21 to 25
Celsius. 40 to 45%
What would cause air to enter the cooling system header tank? - CORRECT ANSWER✔✔-
A water valve at the sleeper.
Why would some electronic have a fuse on the positive and negative side? - CORRECT
ANSWER✔✔- To protect the circuit if someone has the disconnects off.
If there are beach marks leading to the final fracture what kind of beach marks are they? -
CORRECT ANSWER✔✔- Fatigue.
What is the procedure for installing a accessory box? - CORRECT ANSWER✔✔- Long
bolts to align to push in, Timing marks on gear shaft, Under-size countershaft bearings for
ease of assembly, timing marks on transmission input gear, lock it into a gear so that you can
push it in.
Brake pot service chamber leak will show up where? - CORRECT ANSWER✔✔- You
would leak right at the front at the diaphragm.
Brake pot spring side leak will show up where? - CORRECT ANSWER✔✔- At the exhaust
valve in the relay.
When you service hydraulic lining what precaution must be done? - CORRECT
ANSWER✔✔- Chalk wheels.
When you service air suspension what precaution must be done? - CORRECT
ANSWER✔✔- Chalk wheels.
, What causes cab misalignment? - CORRECT ANSWER✔✔- Transverse torque arm.
Landing gear nut is stripped is from? - CORRECT ANSWER✔✔- An overload.
Hood chaffing on cab? - CORRECT ANSWER✔✔- Raise hood mounts.
Before servicing a closed loop hydraulic system, after de-energizing all of the components
what is the next step? - CORRECT ANSWER✔✔- Relieve reservoir pressure.
Signal range on a three wire sensor is? - CORRECT ANSWER✔✔- 0.5 to 4.5 volts. And
reference voltage is 5 volts.
- CORRECT ANSWER✔✔- Change cab/no
One wheel won't lock up on primary drive? - CORRECT ANSWER✔✔- Broken axle on
rear.
In a air system the purge valve won't operate? - CORRECT ANSWER✔✔- Change the
governor.
In a hydraulic pump if oil bubbles in it? - CORRECT ANSWER✔✔- Cracked inlet or outlet.
What is the tool you would use for frame alignment? - CORRECT ANSWER✔✔- Plumb
bob.
If all angles are good except toe out on turn what are the possible causes? - CORRECT
ANSWER✔✔- Lower steering arm wrong, broken or bent.
Truck turns once over the weekend and turns once and locks up? - CORRECT
ANSWER✔✔- Coolant in the combustion chamber.
Questions and CORRECT Answers
What does channel mean? - CORRECT ANSWER✔✔- It equals the number of modulators.
What is comfortable temperature and humidity? - CORRECT ANSWER✔✔- 21 to 25
Celsius. 40 to 45%
What would cause air to enter the cooling system header tank? - CORRECT ANSWER✔✔-
A water valve at the sleeper.
Why would some electronic have a fuse on the positive and negative side? - CORRECT
ANSWER✔✔- To protect the circuit if someone has the disconnects off.
If there are beach marks leading to the final fracture what kind of beach marks are they? -
CORRECT ANSWER✔✔- Fatigue.
What is the procedure for installing a accessory box? - CORRECT ANSWER✔✔- Long
bolts to align to push in, Timing marks on gear shaft, Under-size countershaft bearings for
ease of assembly, timing marks on transmission input gear, lock it into a gear so that you can
push it in.
Brake pot service chamber leak will show up where? - CORRECT ANSWER✔✔- You
would leak right at the front at the diaphragm.
Brake pot spring side leak will show up where? - CORRECT ANSWER✔✔- At the exhaust
valve in the relay.
When you service hydraulic lining what precaution must be done? - CORRECT
ANSWER✔✔- Chalk wheels.
When you service air suspension what precaution must be done? - CORRECT
ANSWER✔✔- Chalk wheels.
, What causes cab misalignment? - CORRECT ANSWER✔✔- Transverse torque arm.
Landing gear nut is stripped is from? - CORRECT ANSWER✔✔- An overload.
Hood chaffing on cab? - CORRECT ANSWER✔✔- Raise hood mounts.
Before servicing a closed loop hydraulic system, after de-energizing all of the components
what is the next step? - CORRECT ANSWER✔✔- Relieve reservoir pressure.
Signal range on a three wire sensor is? - CORRECT ANSWER✔✔- 0.5 to 4.5 volts. And
reference voltage is 5 volts.
- CORRECT ANSWER✔✔- Change cab/no
One wheel won't lock up on primary drive? - CORRECT ANSWER✔✔- Broken axle on
rear.
In a air system the purge valve won't operate? - CORRECT ANSWER✔✔- Change the
governor.
In a hydraulic pump if oil bubbles in it? - CORRECT ANSWER✔✔- Cracked inlet or outlet.
What is the tool you would use for frame alignment? - CORRECT ANSWER✔✔- Plumb
bob.
If all angles are good except toe out on turn what are the possible causes? - CORRECT
ANSWER✔✔- Lower steering arm wrong, broken or bent.
Truck turns once over the weekend and turns once and locks up? - CORRECT
ANSWER✔✔- Coolant in the combustion chamber.
