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Questions in engineering

[Free] Which of these is a common source of arc flashes? A. Overloading electrical circuits B. Operating tools without proper training C. Exposure to extreme temperatures D. Failure to wear proper PPE

[Free] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Free] Describe in detail how to properly jump start a vehicle with a dead battery.

[Free] True or False: FOD walks must be completed at least 5 minutes prior to every aircraft arrival. A. True B. False

[Free] Write short notes on any four of the following: (a) Castigliano's theorem (b) Maxwell Bettie's reciprocal theorem (c) Failure theories (d) Stability of dams (e) Yield design (f) Stress and strain tensor

[Free] What should be in place for all excavations 5 feet or deeper unless they are made in stable rock? Select the best answer that applies. A. A protective system B. A guardrail system C. An authorized attendant D. A scaffold attendant

[Free] a) A pipe of DN 250 mm nominal diameter, OD = 273.1 mm, yield strength 250 MPa, factor of safety 2.5, pressure 12 barg. Find the minimum thickness of the pipe.

[Free] Which ONE of the following is NOT an advantage of a hybrid propulsion installation which has both internal combustion engines and battery-powered electrical propulsion? Choose the ONE best answer. 1) Internal combustion engines can be shut down at periods of low engine use 2) Internal combustion engines can be run at optimum loads to increase their efficiency 3) The space required for the propulsion equipment and batteries is smaller 4) Internal combustion engines can be run at optimum loads to reduce their emissions

[Free] Select the correct answer. Who uses microbiology, chemistry, and engineering to develop foods? A. dietitian B. food scientist C. pastry chef D. personal trainer

[Free] What is the likely consequence of using the wrong oil in a diesel engine? A. Poor fuel economy B. Restriction in the diesel particulate filter C. Loss of engine performance D. Excessive noise in the exhaust system