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the speed of a blower can be done two ways mechanically and electrically
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the correct tension on a belt is 1/4 inch deflection per foot of free span
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belts are sized according to manufacturer and part number or length and width at top of belt
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sheave is open, fan speed low
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sheave is closed, fan speed high
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list the three motors a multispeed direct drive blower will have PSC, shaded pole, ECM
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the formula for temperature rise is supply air minus return air
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the formula for temperature drop is return air minus supply air
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if the temperature rise is too high the fan speed would need to be _________ increased
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if the temperature rise is too low the fan speed would need to be ____________ reduced
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when the fan is mounted on the shaft of the motor it is a direct drive

when checking a motor for a ground condition the two ohmmeter leads are on a motor lead and on the motor housing
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if a voltage exists between a motor housing and a water pipe the condition is grounded
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what two single phase motors do not use a starting relay PSC and shaded pole
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when the line voltage drops the starting and pull out torque drops
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when the line voltage increases the starting and pull out torque increases
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the FLA will be the _________ of the line voltage inverse
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a PSC motor has a _________ run capacitor
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which meter is used on a shorted winding ohmmeter
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a motor winding test that indicates 'O.L.' is open
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a motor winding test that indicates '0' is shorted
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any reading on the ohmmeter during a ground test is not good
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a shaded pole motor is inexpensive and inefficient
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a CS motor has a high starting torque
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a motor using low and high speed for a furnace/air conditioning application will require _______ circuits two parallel
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a physical feature of a shaded pole motor is that it does not have a capacitor
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an open housing motor used with a belt drive will be a split phase motor
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a split phase motor will use a _______ as the start winding disconnect centrifugal switch
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a motor one will rarely find on a furnace is a CS motor
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a motor one will never find on a furnace is a CSR motor