__ occurs when one gas flows backwards into the opposite side gas line due to a pressure Imbalance or a restriction in flow. Backfire Reverse flow Flashback
Can they adapt and handle new material? square
Which potential problem with electrical distribution and motors is caused by the loss of cooling airflow? A High temperatures B Equipment failure C High vibration D Motor not starting
Relays are electromechanical switches that lack auxiliary contacts. True False
The greatest difference between relays and contactors is the fact that contactors are equipped with large contacts that are intended to connect high-current loads to the power line. True D False
Where is the ideal place to install safety nets? 10 feet off the ground 10 feet below the working surface 30 feet under the working surface Directly under the working surface
Which maintenance tasks should be performed every trip? Visually check tire inflation and condition Check battery terminals Inspect coolant fluid and brake master cylinder
A manual reversing starter uses __ Select one: a. a mechanical interlock b. an electrical interlock c. two separate coils d. a single coil
Which diesel system supplies high-pressure diesel fuel to all of the injectors all of the time? Select one: A. Inline B. Rotary C. High pressure common rail D. Distributor
Using E85 can result in which of these? Select one: A. Reduced fuel economy B. Increased exhaust emissions C. Increased fuel economy D. Decreased exhaust emissions
Which process melts an ore to separate useful metals from the rest of the elements in the ore? smelting mining prospecting alloys
Which type of mine may be used to remove coal from a coal seam deep underground? open pit mine strip mine subsurface mine underwater mine
(1) How do self-driving cars travel safely on the streets? Sensors and cameras help self-driving cars $\square $ and $\square $ on the road.
An all wheel drive vehicle increases traction and allows the driver to better manage the vehicle in inclement weather. True False
Which is a likely reason a jacket might contain interfacing? to help it keep its shape to avoid the need for dry cleaning to make the garment easier to construct to absorb odors
The biggest maintenance problem in pneumatic systems is __ Rusted components Noisy components Overheating Air leakage
Never stand directly behind the saw blade. True False
Q7: On right side pistons the arrow on the top of the piston and the dimple on the rod __ and on left side pistons the arrow on the top of the piston and the dimple on the rod __ A. are on opposite sides / are on the same side B. face the outside of the engine/ face the inside of the engine C. face the same direction/ are on opposite sides D. face the inside of the engine/ face the outside of the engine
Technician A says that if the vehicle battery is below 12.4 volts when testing with a voltmeter it should be charged with a smart battery charger . Technician B says that correct tire readings ; are listed on a placard on the driver's side door frame. Who is correct? A) Technician A only B) Technician B only C) Both Technician A and B D) Neither Technician A nor B
The recommended tire air pressure can typically be found: In the owner's manual On a placard typically located on the driver's doorjamb On the side of the tire Both A and B
