How is the water flow in a hydronic heating system checked?
A) By measuring the pressure drop across the water pump and comparing it to a pumping performance chart
B) By measuring the amp draw of the pump motor an applying the formula gp = amps x 1.73
C) By measuring the pump motor RPM using a digital tachometer
D) By measuring the impeller RPM using a stroboscope
A
You might also like to view...
As a result of Parliament's rejection of the petitions of the Continental Congress
A. Americans reluctantly obeyed the British laws. B. the drift towards war became inevitable and fighting between the American colonists and Great Britain commenced in April 1775 at Lexington and Concord, Mass. C. Sam Adams and John Hancock were arrested. D. America sent new petitions to Parliament. E. Ben Franklin returned to the colonies since his efforts failed.
Commercial turkeys cannot breed naturally, and must be _____.
Fill in the blank(s) with the appropriate word(s).
Technician A says that battery load test loads the battery to one-half of its CCA rating. Technician B says that a good battery should be able to maintain higher than 9.6 volts for a 25 second test period. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Which of the following is good for short-range forecasts, can detect trends, but lags the trend?
A) stable forecasting B) delphi technique C) forecast smoothing D) exponential smoothing