How can the installation of a humidifier help to reduce heating costs?
What will be an ideal response?
Desired comfort levels can be reached by increasing the humidity of the space and reducing the thermostat setting. (Lower thermostat setting leads to shorter system run time, saving money.)
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A +2% grade intersects with a –1% grade at station (535+24.25) at an elevation of 300 ft. If the design speed is 65 mi/h, determine:
(a) the minimum length of vertical curve using the rate of vertical curvature Then, using the length found in part (a), (b) the stations and elevations of the BVC and EVC (c) the elevation of each 100-ft station (d) the station and elevation of the highpoint What will be an ideal response?
Technician A that says free and positive are two types of valve rotators. Technician B says that valve grinding should start with truing the valve tip; then the face should be refinished. Who is right?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
The absolute temperature scale for Celsius is:
A) Celsius absolute. B) Fahrenheit. C) Rankine. D) Kelvin.
Large pressurized cylinders on air-conditioning systems that hold more than 15 psig internal pressure must be rated by:
A) The American Society of Heating, Refrigeration, and Air Conditioning Engineers, ASHRAE. B) The Environmental Protection Agency, EPA. C) The Department of Transportation, DOT. D) The American Society of Mechanical Engineers, ASME.