Using a 1:10 scale on an engineer’s scale, a measurement of 3" on a drawing would equal _____.
a. 5 feet
b. 10 feet
c. 20 feet
d. 30 feet
d. 30 feet
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What is the true power in a 2A series RL circuit with a 100? resistor?
a. 50W b. 200W c. 400W d. 600W
Which of the following is a true statement about a steam system that uses a heat recovery flash tank?
a. High-pressure steam and high-pressure condensate can be piped out of the flash tank. b. High-pressure steam is the primary source of flash steam in a flash tank. c. High- or medium-pressure steam condensate can be piped into the flash tank. d. Low-pressure steam and high-pressure condensate are piped out of the flash tank.
A technician pushes a 50-lb box 4 feet in 2 seconds. The rate of work is:
A) 50 lb × 4 ft = 200 ft-lb. B) 4 ft-lb. C) 200 ft-lb/2 s= 100 ft-lb/s. D) 50 lb.
For installations that will have both three-phase and single phase loads on a three-phase transformer, the utility company often provides a(n) _____ three-phase transformer.
A. three wire delta B. three wire wye C. open delta with one transformer center tapped