Which type of refrigerant hose is used with an R-134a system?
A) Barrier hose B) Rigid hose
C) Flexible, porous hose D) Copper type hose
A
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If a 120V feeder for nonmotor loads feeds a continuous load rated at 20A and a noncontinuous load at 30A, what size overcurrent protective device should be selected?
a. 45A b. 60A c. 70A d. 80A
Package boilers were developed in order to _____.
a. reduce the price of boilers b. use alternative sources of fuel c. allow small facilities to generate their own power and steam d. protect the environment
Postaction controls are most appropriate when the product or service involved is quite
complex.
Indicate whether the statement is true or false.The Environmental Protection Agency (EPA) has contracted with your company for equipment to monitor water quality for several lakes in your water district. A total of 10 devices will be used. Assume that each device has a probability of 0.01 of failure during the course of the monitoring period.
a. What is the probability that none of the devices fail? b. What is the probability that two or more devices fail? c. If the EPA requires the probability that none of the devices fail to be at least 0.95, what is the largest individual failure probability allowable?