FCAW-S, the flux inside the wire core contains ingredients that _____
a. cause arc flutter
b. oxidize the weld
c. generate a shielding gas
d. prevent slag from forming
c
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One of the three factors that will cause a three-phase motor’s magnetic field to rotate is that the _____.
a. voltages of a three-phase electrical system are 180° out of phase with each other b. stator windings around the inside of the motor are arranged in a specific manner to induce rotation c. stators have dual-voltage d. three voltages maintain constant polarity
What device is used to signal engine coolant temperatures on most current diesel engines?
A. PTC thermistor B. NTC thermistor C. expansion tube D. bimetal electric sensor
In linear breakeven analysis, if process A has a variable cost of $45 per unit and process B has a variable cost of $31 per unit, which alternative would be preferred if the breakeven point is 7400 units and production is expected to be 6200 units? (choose one)
(a) (b) Process B (c) Process B if its fixed cost is lower than the fixed cost of Process A (d) Cannot tell; need more information
A given circuit using an RC integrator to turn on after 20 seconds now takes now takes much longer to turn on. What is the most probable cause?
A) The capacitor has decreased in value. B) The capacitor has increased in value. C) The resistor has opened. D) The resistor has decreased in value.