When the oil supply is above the oil burner pump, the pump and supply would normally be a ____.
A. single-stage pump, one pipe system
B. single-stage pump, two pipe system
C. two-stage pump, one pipe system
D. two-stage pump, two pipe system
Answer: A
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?Describe the shielded metal arc welding (SMAW) process.
What will be an ideal response?
An expressway off-ramp consisting of a single lane leads directly to a tollbooth. The rate of arrival of vehicles at the expressway can be considered to be Poisson with a mean of 45 veh/hr, and the rate of service to vehicles can be assumed to be exponentially distributed with a mean of 1 min. (a) What is the average number of vehicles waiting to be served at the booth (that is, the number of vehicles in queue, not including the vehicle being served)? (b) What is the length of the ramp required to provide storage for all exiting vehicles 90% of the time? Assume the average length of a vehicle is 18 ft and that there is an average space of 10 ft between consecutive vehicles waiting to be served. (c) What is the average waiting time a driver waits before being served at the tollbooth (that
is, the average waiting time in the queue)? What will be an ideal response?
In the circuit shown in Fig. 11.72, load A receives 4 kVA at 0.8 pf leading. Load B receives 2.4 kVA at 0.6 pf lagging. Box C is an inductive load that consumes 1 kW and receives 500 VAR. (a) Determine I. (b) Calculate the power factor of the combination.
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Inside the air distribution system, where is the temperature-blend door located?
A) In front of the heater core B) After the heater core C) Before the evaporator D) At the dash vent outlets