A problem that can look like refrigerant overcharge if a service technician is only looking at system pressures is:
A) Low evaporator airflow. B) High evaporator airflow.
C) Low condenser airflow. D) An overfeeding refrigerant metering device.
C
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If the specific gravity of the material is greater than 1.0, what is true of horsepower?
A. Less horsepower is required. B. More horsepower is required. C. No horsepower is required. D. Horsepower will depend on the viscosity of the liquid.
Las dos maneras de variar la velocidad en un motor de CC en derivación es ajustar la tensión y la corriente en el devanado de campo o el/la
a. reostato. b. armadura. c. controlador. d. estátor.
Which of the following is of greatest concern to food processing companies?
A) Food spoilage microbes B) Food-borne pathogens
All of the following statements about rear drum parking brakes are true EXCEPT:
A. they make use of the rear drum brake components. B. a lever inside the drum is moved by the brake cable. C. the lever forces the wheel cylinder pistons out to force the brake shoes against the drum. D. the brake cable runs through a metal conduit that enters the drum assembly through the backing plate.