United States Coast Guard Marine Engineer Exam Questions Steam Knowledge Question Choice A Choice B Choice C Choice D Illustration BOOK Answer Number Question 13 1 D A bridge gage is normally used to determine turbine bearing oil clearance diaphragm tip clearance blade axial clearance bearing wear ____________. 13 2 B Coast Guard Regulations (46 CFR) requires machinery driving within the space outside of the space at the throttle station within the fireroom the fuel oil transfer and fuel oil service pumps to be fitted with a concerned concerned remote means of stopping that machinery ____________. 13 3 D If a ship is to be laid up for an indefinite period, the saltwater side left filled with saltwater left filled with saltwater drained and refilled with drained and dried out of the main condenser should be ____________. with the sea valves with the sea valves open saltwater after closing after closing the sea closed the sea valves valves 13 4 D According to U.S. Coast Guard Regulations (46 CFR), which of Fire pump Boiler Feed pump Fuel oil transfer pump All of the above the following pumps is required to have a pressure gage provided on the discharge side of the pump? 13 5 D Assume that steam has formed in a boiler in which all of the The steam pressure and The pressure will The pressure will remain The pressure will steam stop valves are closed, and the water level is held volume will remain increase and the volume constant and the volume increase and the specific constant. When there is an increase in the temperature of the constant. will remain constant. will increase. volume will decrease. steam and water in the boiler, which of the following effects will occur on the pressure and the specific volume of the steam? 13 6 B When a mixture of steam and water in a boiler has reached the supercritical end point critical end point vaporization end point saturation end point point at which NO further change in state can occur with the addition of heat, the mixture is considered to have reached its ____________. 13 7 D Which symbol shown in the illustration is used to identify a stop- A B C D See illustration check valve on a drawing? number(s): SG-0014 13 8 D If the water level cannot be seen in the lower part of the boiler Increase the feedwater Check the DC heater Blowdown the boiler. Secure the boiler fires. gage glass, which of the following actions must be carried out going to the boiler. water level. immediately? 13 9 D The item labeled "C" in the illustration, is the ____________. low pressure drain high pressure drain low pressure vent low pressure steam See illustration connection connection connection supply connection number(s): SG-0025 13 10 D Fuel oil solenoid valves at the burner fronts should be of the permit the operator to permit the operator to prevent the furnace filling prevent the furnace filling manual reset type to _____________. secure each burner secure each burner after with oil during a power with oil after restoration during a blackout a blackout failure of power 13 11 C Axial movement in a gear-type flexible coupling is provided for by each gear sliding on its the variable oil clearance external teeth on the adjusting the pitch of the _____________. shaft between retaining in the quill shaft floating member sliding teeth on the pinion and collars between internal teeth high speed gears on the shaft ring 13 12 B A sectional (sinuous) header boiler is classified as which of the Bent tube Straight tube Express D-type listed boiler types? 13 14 B Which of the following fuel oil characteristics establishes the Fire point Flash point Specific gravity Viscosity danger point when transferring, pumping, and firing procedures are concerned? 13 15 C When condenser tube ends are rolled into both tube sheets the belled joints at both tube threaded brass ferrules expansion joints in the metallic packing pressed different rates of material expansion is compensated for by ends on the tube ends condenser shell around the tube ends utilizing _________. 13 16 A The Butterworth heater shown in the illustration receives steam 130 psi 140 psi 143 psi 850 psi See illustration at approximately _______. number(s): SG-0005 13 17 B The BTU value of fuel oil is determined by a/an ___________. open cup test calorimeter hydrometer viscosimeter This document, and much more, is available for dowload at Martin's Marine Engineering Page - www.dieselduck.net United States Coast Guard Marine Engineer Exam Questions Steam Knowledge 13 18 B The variable capacity pressure atomizing fuel oil burner functions maintain a constant fuel provide a wide range of provide a constant fuel maintain smokeless fuel to _____________. temperature combustion return pressure oil atomization 13 19 D As the pH of the boiler water approaches zero, the water soft alkaline neutral acidic becomes increasingly _____________. 13 20 B A combustion control system diaphragm type air flow transmitter fan discharge windbox furnace smoke box receives its high pressure signal from the boiler ____________. 13 21 C Concerning the classification of steam turbines, a compound consisting of reaction consisting of one Curtis consisting of a high made up of impulse and designed turbine is a unit _____________. stages and a dummy stage and reaction pressure turbine, reaction staging piston blading crossover pipe, and low pressure turbine 13 22 B A sectional (sinuous) header boiler is classified as a/an bent tube type straight tube type "A" type "D" type ______________. 13 23 D The required number of pounds of steam generated per hour to overload capacity for efficiency of each boiler efficiency of each full power capacity of develop contract shaft horsepower and maintain the specified each boiler fireroom each boiler pressures and temperatures in the plant, when divided by the number of installed boilers, will give the ____________. 13 24 B Which type of energy is associated with the water of an operating Chemical Thermal Mechanical Specific boiler? 13 25 D Condensate return lines from tank heating coils are led to the atmospheric drain tank main condenser DC heater contaminated drain _____________. system 13 26 A In which of the listed components is chemical energy converted Furnace Superheater Steam drum Economizer to thermal energy with regards to boiler operation? 13 27 A Coast Guard Regulations (46 CFR) regarding hydrostatic testing the hydrostatic test shall not less than fifty percent the hydrostatic test a pipe with a nominal of main steam piping state that ____________. be applied from the of the lagging shall be pressure must be size of six inches or boiler drum to the throttle removed each time the maintained on the piping more is not required to valve hydrostatic test is applied for a minimum of one be hydrostatically tested hour 13 28 A If the water level in a steaming boiler is dropping rapidly and secure the fires and then secure the steam stop blowdown the guage speed up the feed pump cannot be kept at the normal level by standard practices, you secure the steam stop and then secure the fires glass to find the true to raise the water to should _____________. water level normal 13 29 C The total heating surface of any steam generating unit is Those parts of a boiler Those parts of a boiler Those parts of a boiler Those parts of a boiler comprised of which of the listed surfaces? which are exposed on which are exposed on which are exposed on which are exposed on one side to only the one side to only the one side to the water or one side to only the water being heated and steam being heated and steam being heated, and water being heated and on the other side to the on the other side to the on the other side to the on the other side being combustion gases, such combustion gases, such combustion gases. directly exposed to the as the economizer as the superheater furnace flame. surfaces. surfaces. 13 30 C A combustion control system, diaphragm-type, air volume windbox casing furnace smoke pipe regulator receives its low pressure signal from the boiler _______________. 13 31 A In a cross-compound main propulsion unit, the astern turbine is low pressure end of the high pressure end of the low pressure end of the high pressure end of the usually installed at the _____________. low pressure turbine low pressure turbine high pressure turbine high pressure turbine 13 32 A The purpose of a "peep" hole in the boiler casing is to examine the condition of check the operation of check for excess smoke examine the condition of _____________. the flame the soot blowers in the stack the refractory cones 13 33 B Which of the listed characteristics is determined by calculating Fireroom efficiency Boiler efficiency Plant efficiency Each of the above the amount of heat absorbed by the water and steam, then dividing by the available heat in the total pounds of fuel oil burned? This document, and much more, is available for dowload at Martin's Marine Engineering Page - www.dieselduck.net United States Coast Guard Marine Engineer Exam Questions Steam Knowledge 13 34 C If a centrifugal main feed pump were operated at shutoff head A decreased water level An increased water level Flashing at the suction Excessive diaphragm with the recirculating line closed, which of the following conditions in the DC heater. in the steam drum. side of the pump. seal wear in the could occur? feedwater regulator.