Before a completed building can be used, permanent utilities must be installed and _____
a. the owner must provide approval
b. approved by the architect
c. a certificate of occupancy issued
d. final payment made to the contractor
c
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What is an indication that engine oil has become contaminated with engine coolant?
A. cloudy appearance B. greenish color C. reddish color D. darker in color
Use an approximate analysis of the continuous truss in Figure P13.11 to determine the reactions at A and B. Also evaluate the forces in bars a, b, c, and d. Given: P = 9 kN.
The crankcase heater protects the compressor on startup by
A) vaporizing any liquid refrigerant that may enter the compressor during the OFF-cycle B) Keeping the oil warm so that it does not become too thick to lubricate properly C) Drying out any water in the oil D) Providing an extra heat source, making the compressor's job easier
What information is necessary to determine a system balance point?
A) A heat load calculation and the system capacity at two operating conditions B) The balance point is determined as part of the heat load study before the equipment is chosen. C) The balance point for all AHRI rated heat pumps is 35°F. D) The manufacturer's installation instructions, which publish the equipment balance point