A water closet must contain a(n) ____________________ to prevent sewer gas from entering a room.
Fill in the blank(s) with the appropriate word(s).
ANSWER: water seal
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La oscilación rápida de cargas suspendidas coloca al equipo en riesgo de sufrir un/a ____, que podría provocar un derrumbe.
a. menor radio de giro b. corte de energía c. carga lateral adicional d. aparejamiento inseguro
A _____ can usually be left alone for several days and will fit well into small apartments
A) dog B) cat C) gerbil D) ferret
Why don't variable-air-volume zone systems need any method of controlling excess air?
A) The fans used are not capable of producing excess air. B) Any excess air is automatically diverted outside. C) All the dampers pass a little air, even when they are closed. D) They reduce the system airflow to match the number of zones calling.
Many late model vehicles use a(an) ________________ to help clean the air in the vehicle
A) Drip system B) Condenser filter C) Cabin filter D) None of these