Skilled Trades Practice test Please wait... 1. What happens if ductwork is undersized?No effect High static pressure and poor airflow High airflow Low static pressure 2. What component removes moisture from the system?Condenser EvaporatorFilter drier Compressor 3. What is the square root relationship commonly associated with 3-phase voltage calculations?0.53.1421.732 4. What is a major advantage of using current (mA) instead of voltage?Easier to install Less affected by electrical noise and distance Lower resistance Higher voltage 5. What does a soft starter primarily reduce?Breaker trip ratingsGround resistanceHarmonic distortion completelyMotor inrush current 6. What is the purpose of balancing dampers?Increase temperature Increase pressure Control and balance airflow in ducts Reduce refrigerant flow 7. What happens if supply ducts leak?Lower energy usage Increased efficiency Increased airflow Loss of conditioned air 8. What does impedance primarily affect during a fault condition?Ground rod depthWire insulation colorConduit fill percentageFault current magnitude 9. What causes low DO in aeration tanks?Cold temperature High organic load Low flow High pH 10. What is inflow?Groundwater Air Sludge Stormwater entering system Loading...
