__ 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
Plastic components should be wiped with Motorcraft Metal Surface Prep Wipes prior to applying the RTV on the plastic component. A) TRUE B) FALSE
Select the correct answer and then click the Next button. Which coating classification BEST describes the presence of defects, but no serious corrosion? a. Good b. Fair c. Poor d. Bare
Select the correct answer and then click the Next button. What can interrupt cathodic protection and mask corrosion? a. Humidity b. Dissimilar metals c. Disbondment d. Static electricity
Select the correct answer and then click the Next button. What often causes pockets with corrosion grooves? a. Thin spots b. Wrinkled tape c. Holidays d. Air pockets
Select the correct answer and then click the Next button. What is the cause of premature pipeline corrosion? a. Keeping pipe aboveground b. Using cast iron pipe c. Coating failure d. Low product flow
Which type of slack adjuster is offered by most manufacturers because it resists over-adjustment? Select one: a. Stroke-sensing ASAs b. Clearance-sensing ASAs c. Manual slack adjusters d. Six-inch slack adjusters
Self-powered test lights are like regular test lights except that they contain a __ battery. Select one: a. 0.3-volt b. 24-volt C. . $12-volt$ d. 1.5-volt
What distinguishes a BIMODAL PV System from a UTILITY INTER-ACTIVE PV System? Bimodal has batteries Both are grid connected. Utility Interactive is cheaper
3. The engine in your car is sometimes called: A. A 4-stroke engine B. A 2-stroke engine C. An external combustion engine D. None of the answers
QUESTION: Which statement is true about the effects of ambient temperature on solid state devices? POSSIBLE ANSWERS: A solid state device is more likely to withstand excessive cold than excessive heat. The typical failure rate for a solid state device is $35^{\circ }C(95^{\circ }F)$ The failure rate for a solid state device doubles for every $10^{\circ }C$ that the temperature rises.
