Explain how air diffusion through a building envelope is reduced.
What will be an ideal response?
This is done by covering the opaque parts of the exterior walls with an air barrier.
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Technician A says the heated oxygen sensor monitor performs two distinct tests; one test verifies the performance of the pre- and post-oxygen sensor heater element and circuit. Technician B says the heated oxygen sensor monitor performs two distinct tests; one test monitors the pre- and post-oxygen sensor signal switch rate and signal circuit. Who is correct?
A. A only B. B only C. both A and B D. neither A nor B
Which refrigerant is most commonly used in current reefer trailers?
a. propane b. R-22 c. R-134a d. R-12
In order to double fan RPM, the motor horsepower
A) Must increase by a factor of 4 (2 × 2 ) B) Must increase by a factor of 8 (2 × 2 × 2 ) C) Will not be affected by the fan RPM D) Must also double
A hybrid vehicle has one type of power or propulsion system.
Answer the following statement true (T) or false (F)