3- State which of the following statements are TRUE? a) For a backward curved blade, the fan total pressure (FTP) increases as flow rate increases b) For a backward curved blade, the fan total pressure (FTP) reaches a maximum at a particular flow rate c) When the air filter in the air conditioning duct becomes dirty, the speed has to be increased to maintain the balance between fan and duct systems d) When the damper installed in the duct is opened more, to maintain the balance, the speed of the fan should be increased

A building owner has several leaking hot water faucets that waste a combined total of 50 gallons per day. The supply hot water temperature in the building is 130 °F and the mains water temperature is 50 °F. If the hot water is provided by a natural gas boiler with an efficiency of 85%, how much energy could be saved if the owner repairs the leaking faucets? a. 23,292 kBtu/year b. 12,184 kBtu/year c. 1,717 kBu /year d. 14,326 kBtu/year

find the following problem by showing the steps  A .  net head  B. water horse power ( power)  c.  brak horse power ( bhp ) d.  pump efficiency

Kindly don't use Ai. I need Correct answer with an explanation

State the operation principle of pressure-limiting variable vane pump according to the following figure

A two-blade wind turbine is exposed to 60 mile/h wind. Downstream of the propeller the wind speed is 45 mile/h. The propeller has a diameter of 45 ft. Assume ideal gas and standard condition for air to find a) the thrust on the wind turbine, b) the power delivered to the wind turbine, c) the maximum power extracted by the wind turbine, d) the maximum efficiency obtained from this wind turbine.

1c. List the two methods of recovering heat from a central air-conditioning system. Draw the block diagram for one of the two methods.

just a solution

choose the correct answer     E. None of the above       C. 321 N. 2500 N       D. 2465 N. 320 N       A. 2465 N. 321 N       F. 312KN. 2460 KN       B. 321 N. 2465 N