Which of the following is an analog input device?
a. Pressure switch
b. Thermistor
c. Transducer
d. Actuator
b
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Technician A says that breathable air used for air supply respirators must be class A air. Technician B says that breathable air used for air supply respirators must be class D air. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B
Manual screeds can be made of wood or _____.
a. steel b. aluminum c. magnesium d. fiber-reinforced plastic
All of these statements about lip seals are true EXCEPT:
A. They keep lubricant in the bearing B. They keep dirt out of the bearing C. They may have a spring-loaded lip D. They can be installed in any direction
To prevent the system refrigerant from quickly dropping in temperature and pressure, refrigerant recovery should:
A) Always take place while the system is operating. B) Only be attempted in the summer. C) Begin with vapor. D) Begin with liquid.