Millwright Period 4 Exam Results Questions With Verified Answers

Millwright Period 4 Exam Results Questions With Verified Answers Engine Block Rejection - answerMost common reason: cracks after cleaning and inspection. Steam Turbine Class - answerRated up to 700 psig and 399°C: class 3 turbine. Gas Turbine Seals - answerUsed on compressor and turbine: labyrinth seals. Electronic Overspeed Trips - answerTypically used on turbines above 10,000 rpm. Zener Diode Excess Voltage - answerOn low-tension magneto: shorted to ground. Pickling of Steel Piping - answerProcess: running an acid bath through the piping. Room Venting - answerAir intake: high location, outlet: low location. Gas Turbine Speed Conditions - answerSingle shaft category: NOT suitable for variable speed. Intake Manifold Pressure Sensors - answerIndicate engine load for millwrights. Ring Expander Usage - answerUsed to install compression rings on engine pistons. Cylinder Liner Cracking - answerCaused by overheating, hot spots, piston seizure. Low Frequency Instability - answerGovernor issue caused by fuel pressure variations, worn control valve. Crankshaft Deflection - answerCan cause bearing overheating, inaccurate alignment, short coupling life. Heavier Fuels in Gas Turbine - answerNecessitate longer flame tubes for installation. Coolant Selection Caution - answerPropylene glycol-based coolants can swell plastics at high temperatures. Valve Cover Breather - answerIndicates positive crankshaft ventilation in the engine. Diesel Engine Governor Drive - answerDriven by gear or belt from crankshaft or camshaft. Basic Governor Function - answerDesigned to operate the throttle valve on a prime mover. Governor Speed Change - answerAmount of change from no load to full load: speed droop.