What can cause bearing damage?
A. Corrosion
B. Oil pump failure
C. Excessive temperatures
D. Abnormal conditions
A. Incorrect. Bearing damage can result from excessive temperatures and vibration caused by shaft bowing or other shaft misalignment problems.
B. Incorrect. Loss of lubrication can result from oil pump failure or plugging of the oil filter.
C. Correct. Bearing damage can result from excessive temperatures and vibration caused by shaft bowing or other shaft misalignment problems.
D. Incorrect. A turbine trip occurs when a turbine has shut down due to abnormal conditions.
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A large water utility is planning to upgrade its SCADA system for controlling well pumps, booster pumps, and disinfection equipment for centralized monitoring and control. Phase I will reduce labor and travel costs by $28,000 per year. Phase II will reduce costs by an additional $20,000 per year, that is $48,000. If phase I savings occur in years 0, 1, 2, and 3 and phase II savings occur in years 4 through 10, what is the present worth of the upgraded system in years 1 to 10 at an interest rate of 8% per year?
What will be an ideal response?
When performing a test and balance procedure on a zoned system, correct airflow should first be established:
A) For each zone before balancing the individual branches. B) For the branch with the highest CFM requirement in each zone. C) For each branch before balancing the zones. D) For the branch with the lowest CFM requirement in each zone.
Fixed windows are popular when a large unobstructed area of glass is required to take advantage of a view or to allow solar heat gain.
Answer the following statement true (T) or false (F)
Each of the following is a method used to maintain indoor air quality except _____
A) an open window B) electronic air cleaners C) exhaust fans D) condensate pumps