Heat recovery ventilators are recommended over energy recovery ventilators in cold climates
A) because there is so little heat in cold climates to exchange
B) because colder climates are not affected by humidity differences
C) because of the denser air
D) to avoid freezing the water they remover
D
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Cuando se finaliza una tarea de corte y el equipo de oxigás ya no es necesario, el primer paso para apagar el equipo de corte oxigás es _____.
a. retirar los tornillos de ajuste del regulador de gas combustible y de oxígeno b. abrir la válvula del soplete de gas combustible c. cerrar la válvula del cilindro de gas combustible d. abrir la válvula del soplete de oxígeno
A(n) ____ is a type of rotating switch.
A. stator B. prony brake C. armature D. commutator
All these are causes of catalytic converter failure EXCEPT ________
A) Excessive temperature B) Incorrect air/fuel mixture C) Contamination D) All of these are causes of converter failure
___________ are used in the vast majority of AM detection schemes where the carrier and sidebands are present
A. Foster–Seeley discriminators B. Ratio detectors C. Diode detectors D. FM discriminators