Stationary Engineer License Exam Prep - Complete Solutions (Answered)

Stationary Engineer License Exam Prep - Complete Solutions (Answered) The pressure sensitive device attached to a fan housing is called a a. pressuretrol b. aquastat c. thermostat d. vaporstat Draft is measured in a) ounces per square inch b) inches of water c) inches of mercury d) pounds per square inch Which of the following is used to measure temperature? a. fyrite analyzer b. vaporstat c. orsat analyzer d. pyrometer The main stop valve is located on the a) oil supply line b) condensate breaker c) vacuum breaker d) steam line OS&Y stands for a) overhead steam and yield b) outside screw and yoke c) outside stem and yoke d) overall stainless and yoke An interlock control is a(n) a) device that prevents attempts to fire unless safe b) wrench that secures the burner c) device that prevents the main stop from opening d) automatic control lock Trial for ignition refers to the a) burner testing period b) time the main fuel valve stays open for ignition c) flame light test d) the flame scanner detecting the pilot flame More than one safety valve is required for boilers that have over a. 100 sq ft of heating surface b. 500 sq ft of heating surface c. 100 psi MAWP d. 500 psi MAWP Two or more boilers that are equipped with manholes and are connected to a common header must have a. two stop valves with a common drain coming off between them b. both a non-return and gate stop valve c. both a globe and gate stop valve d. a stop and a check valve Before the gas pilot ignites, the a) low-water cutoff must be checked b) gas pressure must be at least 10 PSI c) furnace must be purged d) oil pressure must be at least 50 PSI If the main fuel valve is closed while the burner is on, a) there will be high water b) there will be low water c) the oil temperature will drop d) the flame detector will activate Pyrometers measure a) temperature b) draft c) smoke density d) vacuum Safety valves on superheaters are set a. the same as drum safety valves b. lower than drum safety valves c. higher than drum safety valves d. superheaters do not have safety valves Convert 160 PSI to absolute pressure a) 145.3 psia b) 160 psia c) 167.3 psia d) 174.7 psia (160 + 14.7 psi) What is the minimum pipe size of the gauge glass blowdown line? a. 3/8" b. 1/2" c. 3/4" d. 1" One one bottom blowdown valve is required for boilers under a. 100 sq ft heating surface b. 500 sq ft heating surface c. 100 psi MAWP d. 500 psi MAWP The type of safety valve allowed on boilers is the a. weight and lever b. thermostatic relief c spring loaded poppet d. all of the above What is authorized to repair and adjust safety valves? a. Chief Engineer b. State inspector c. Insurance inspector d. Manufacturer's representative Cast iron boilers can be used a. only for process steam b. only for low pressure steam plants c. only for high pressure steam plants d. in low or high pressure steam plants Which valve allows flow in one direction only? a. check b. plug c. globe d. stop To stop a safety valve from chattering A. Increase tension on the spring B. Decrease tension on the spring C. Raise the blowdown ring D. Lower the blowdown ring The minimum permitted size of the water column pipe connection is a. 3/8" b. 1/2" c. 3/4" d. 1" The number of complete turns required between open and closed on a slow opening valve is a. 3 b. 5 c. 7 d. 9 What is the principle of the Bourdon tube? a. Thermal reaction b. Hydraulic impulse c. Electrical impulse d. Pressure straightens out the tube A valve must be installed in the feedwater line a. between the boiler and the check valve b. between the check valve and the feedwater pump c. at the discharge of the feedwater pump d. A valve is not required A continuous blow down is used to: a. remove accumulated solids b. remove scum and oil c. remove water when the gauge glass level is high d. verify drum level What should come out when the bottom try cock is opened? a. superheated steam b. dry steam c. water d. steam and water What is the minimum diameter for the water column blowdown line? a. 1/2" b. 3/4" c. 1" d. 1.5" What is the minimum size piping for bottom blowdown lines? a. 1/2" b. 3/4" c. 1" d. 2.5" How often are safety valves tested? a. each shift b. monthly c. yearly d. when the boiler is down for inspection A two element feed water regulator is controlled by a. water level and feedwater flow rate b. steam flow rate and feedwater flow rate c. water level and steam flow rate d. water level alone Which of the following is not performed by a non-return valve? a. cuts a boiler into the header automatically b. opens automatically when boiler pressure falls below header pressure