As the air filter gets dirty, the static pressure drop across the filter
A) stays the same B) increases C) decreases
B
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With primary resistor starters, the motor starts at a ____ power factor than with other starting methods.
a. much lower b. slightly lower c. slightly higher d. much higher
The following statements are all correct EXCEPT ________
A) Recommended oil pressure is 1 PSI for every 1000 RPM. B) Oil pressure readings should be made at idle and 2500 RPM. C) Oil pressure testing should be done at normal operating temperature. D) Oil pressure may be tested by removing the oil pressure sending unit and installing a pressure gauge.
Two common methods for measuring airflow in residential systems are
A) Velocity pressure transducers B) Temperature rise or static pressure drop C) Fan tip speed and a fan curve plot D) Electronic flow hoods
Matter cannot be created or destroyed, but it can and does change form. This statement is known as:
A) Dalton's law of matter and energy. B) Charles' law of kinetic energy. C) The law of conservation of matter. D) The second law of thermodynamics.