If your truck or bus has dual parking control valves, you can use pressure from a separate tank to:

a. Stay parked twice as long without using up service air pressure.
b. Balance the service brake system when you are parked.
c. Release the spring emergency/parking brakes to move a short distance.


c. Release the spring emergency/parking brakes to move a short distance.

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Bald Eagle Creek flows into Bald Eagle reservoir, which acts as a completely mixed reactor. Bald Eagle creek has a flow rate of 0.20 m3/s and a dissolved oxygen concentration of 4.75 mg/L. Bald Eagle reservoir has a volume of 104 m3. Oxygen is removed in the lake through biological processes and the reaction rate, kd, is 0.30 day–1. Evaporation removes water from the surface of the lake at a rate of 0.002 m3/s. Determine the effluent flow rate and dissolved oxygen concentration for this completely mixed lake.

What will be an ideal response?

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To increase furnace efficiency, the startup of the furnace blower is delayed using a _____.

a. thermocouple b. limit control c. time-delay relay d. short-cycle time

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For the circuit shown in Fig. 4.131, determine the relationship between V? and I?.

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A technician checks the resistance of the primary winding on a transformer and reads 0. 2 ohms. This tells the technician that:

A) The transformer should be rewired to use the secondary winding. B) The primary winding is shorted. C) The primary winding is open. D) The primary winding is good.

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