Why does engine coolant tend to breakdown faster in current diesel engines?
A. Higher operating temperatures.
B. Extensive use of aluminum in the cooling circuit components.
C. Current diesels also use coolant for component lubrication which accelerates breakdown.
D. Because of silicone based hoses.
Answer: B
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Flux vector drives operate by monitoring rotor position and changing the rotor's position as compared to its orientation to the ____.
A. set position B. reference position C. stator field D. current direction
?Why would a welder stick the end of the filler rod in the weld pool as the weld is being stopped?
A. ?It accidentally happens sometimes but they would not do it on purpose. B. ?To prevent dropping it when changing positions. C. ?To help to prevent crater cracking. D. ?It cools off the end of the filler rod to prevent oxidization.
What are presentation boards used for?
A. displaying the initial working drawings B. displaying the final drawings C. explaining how large pieces of heirloom furniture will be displayed D. presenting fabric samples for wall finishes and furniture
Which of the following is a joining process?
A. welding B. casting C. molding D. broaching