CONTROL QUIZ This quiz should allow you an indication of your basic control understanding before studying the control course. This quiz does not cover every aspect of potential situations you will face. The hope of the course is bringing you to a comfort level with the various control techniques available to you in solving challenges. Only select True or False if you are positive. Record your number of correct, incorrect and unanswered items. After studying the course repeat the quiz comparing the two results. The answers are at pages 10.177 to 10.183 in this training manual. PNEUMATIC THERMOSTATS -1- In a reheating application you may find a reverse acting thermostat controlling a normally closed valve. True False -2- Two pipe relay thermostats usually are capable of passing a greater volume of compressed air than a one pipe thermostat. True False -3- Day/night and summer/winter thermostats alter modes via a change in main air pressure. True False -4- There are several different pressure combinations used for day/night and summer/winter changeover in the industry. True False -5- Relay type thermostats bleed a small amount of compressed air most of the time. True False -6- Two thermostats are required to control a room with a VAV box and a heating coil. True False -7- If the flapper nozzle (leak port) is plugged on a direct acting thermostat, controlling a normally open heating valve, the room will likely over-heat. True False -8- If an operator accidentally bends the bimetal away from the flapper nozzle (leak port) on a reverse acting thermostat controlling a normally closed cooling valve, the room will likely over-heat. True False -9- The sensitivity of a thermostat is the relationship of temperature change to output signal (branch signal) change. True False -10- The sensitivity can be changed on most thermostats, but recalibration is required after that adjustment. True False 1.1
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