-4- Exposing an actuator to pressure higher than recommended by the manufacturer could result in damage to the building, personal injury or death. True False -5- The return air damper should start closing before the fresh air damper starts opening. True False -6- If the return air is closed and the fresh air damper is closed there is no danger of collapsing duct work. True False CONTROLLERS -1- A controller, with its sensing mechanism, senses the controlled condition directly. True False -2- Normally a controller has an averaging sensing element when sensing the mixed air. True False -3- If a fluid or gas filled sensing element is broken, the controller will believe the temperature suddenly increased. True False -4- Sensitivity and throttling range are the same. They relate to the relationship of the output pressure change relative to a specific temperature change. (example: 5#/F°) True False -5- Normally the slower the controlled condition potentially changes, the higher the sensitivity (lower the throttling range) (lower the proportional band )on the controller. True False -6- A controller acting as a mixed air low limit typically has a set point of 55°F to 60°F. True False -7- The sensitivity is not normally adjustable on controllers. True False -8- Throttling range is the amount of the sensed variable change required to stroke the controlled device from fully open to fully closed. True False -9- A single controller can be used to satisfy only one function in a control circuit. True False 1.4
RkJQdWJsaXNoZXIy ODY1ODQy