Stationary Engineer Exam Questions with 100% Correct answers

Cl2 Correct Answer Chlorine boiler Correct Answer equipment that provides hot water or steam for various uses PRV Correct Answer PRESSURE RELIEVE VALVE NOWL Correct Answer Normal operating water level BTU Correct Answer British Thermal Unit absolute pressure Correct Answer gauge pressure (psi) + atmospheric pressure (14.7 psi) at sea level air changes per hour Correct Answer The hourly ventilation rate divided by the volume of a space. For perfectly mixed air or laminar flow spaces, this is equal to the number of times per hour that the volume the space is exchanged by mechanical and natural ventilation. Air conditioner Correct Answer An appliance, system, or mechanism designed to dehumidify and extract heat from an area. Chiller Correct Answer A device that removes heat from a liquid via a vapor-compression or absorption refrigeration cycle. This cooled liquid flows through pipes in a building and passes through coils in air handlers, fan-coil units, or other systems, cooling and usually dehumidifying the air in the building. Chillers are of two types; air-cooled or water-cooled. Air-cooled chillers are usually outside and consist of condenser coils cooled by fan-driven air. Water-cooled chillers are usually inside a building, and heat from these chillers is carried by recirculating water to a heat sink such as an outdoor cooling tower. Condenser Correct Answer A component in the basic refrigeration cycle that ejects or removes heat from the system. The condenser is the hot side of an air conditioner or heat pump. Controller Correct Answer A device that controls the operation of part or all of a system. Dry Bulb Thermometer Correct Answer Dry bulb temperature is the temperature of air measured by a thermometer which is freely exposed to the air while it is shielded from radiation and moisture. It is usually thought of as air temperature, and it is the true