Final

Question 1

Horizontal lines appearing in the graph denote

Answer 1

Latent heat transfer

Question 2

Vertical lines appearing in the graph denote

Answer 2

Pure transfer of heat energy with zero loss

Question 3

Enthalpy may be best described as

Answer 3

Total energy of a substance from its mass and flow

Question 4

Each “bump” to the left of the curve represents

Answer 4

Some form of regenerative heating of liquid

Question 5

Beginning at the point where the substance is at its coldest, the sequence of events in a typical Rankine steam cycle is

Answer 5

Recovery Feed Generation Expansion

Question 6

A process by which transfer is 100% reversible with absolutely no loss of energy from the system is known as

Answer 6

Isentropic

Question 7

On a typical 900# steam plant at full sea speed, the de-aerating feed tank commonly gets its steam from the

Answer 7

Auxilliary Exhaust

Question 8

Which of the following statements concerning the typical shipboard auziliary exhaust system is false?

Answer 8

The system pressure is largely unregulated except for the steam supply directly off the boilers

Question 9

What device accounts for the larges single loss of efficiency in any Rankine steam cycle

Answer 9

Condenser

Question 10

What is the primary limitation to achieving higher superheat temp for a given steam plant?

Answer 10

Metallurgy

Question 11

While they are possible and do exist, which of the following is less commonly found on marine propulsion steam plants?

Answer 11

Reheater boilers

Question 12

The bump between points 7 & 1 on Fig. 2 probably represent the effect of the

Answer 12

Feedwater de-aerator tank

Question 13

“Condensate depression” refers to what thermodynamic condition?

Answer 13

Excess sub cooling of recovered condensate below designed temperature

Question 14

Name four ways by which overall steam plant efficiency may be increased

Answer 14

?

Question 15

The device marked “B” is a

Answer 15

Baffle Plate

Question 16

The parameter typically measured for control of a shipboard make-up feed regulator is

Answer 16

level lower than a predetermined value in the de-aerating feed tank

Question 17

Attemporation of a typical marine super heater is accomplished by the means of

Answer 17

A regulator on the outlet to the control desuperheater tube bundle

Question 18

An “O-frame” type boiler is mostly commonly found in what sort of applications?

Answer 18

Shore side package boiler steam service

Question 19

Standard marine superheaters are generally equipped with

Answer 19

Screen tubes to shield the superheater from radiant heat

Question 20

All of the factory below affect separation of steam and wather within a typical steam drum except

Answer 20

superheater temperature

Question 21

Steam-water mixtures enters the cyclone shown if figure 4 via

Answer 21

?

Question 22

What is the primary device by which adequate flow through the typical marine superheater is ensured during normal operations

Answer 22

The auziliary desuperheater

Question 23

What sequence below best describes the flow path of water and steam in a typical secional heater type boiler

Answer 23

Headers, generating tubes, steam drum, superheater

Question 24

Economizers fitted to modern marine boilers perform which of the following functions?

Answer 24

Preheating of feedwater with exhaust stack gas before it enters the steam drum

Question 25

The device marked "A" should be fitted with a ___ in order to ensure that only water is returned to the condensate system

Answer 25

Steam trap

Question 26

The parameters that may be considered a good reflective indicator of overall boiler efficiency are

Answer 26

stach temp and economizer water outlet temp

Question 27

Assume that the steam has formed in a boiler in which all of the steam stop valves are closed and the water level is held constant. When there is an increase in the temperature of the steam and water in the boiler, which of the following effects will occur?

Answer 27

The pressure will increase and the specific volume will decrease

Question 28

When heating heavy fuel oil for use in main propulsion boilers aboard ship, the flash point may be exceeded only when

Answer 28

it is required for proper atomization

Question 29

Calibration of a typical automated fuel oil regulation system is largely dependent upon

Answer 29

defined and constant pressure upstream of the fuel oil regulator valve

Question 30

All of the factors below with regard to hot oil strainers are true except

Answer 30

containment shield or hood is unnecessary

Question 31

Modern fuel oil temperature control devices are regulated to obtain desired viscosity rahter than a specific fuel oil temperature because

Answer 31

the relationship between temperature and viscosity varies with different fuels

Question 32

What is the primary means by which fuel oils are heated in a typical steam propulsion plant fuel oil service system?

Answer 32

A contaminated steam generator and associated shell and tube heat exchangers

Question 33

The reaction of nitrogen with oxygen molecules in a typical modern shipboard boiler furnace is mostly the result of

Answer 33

Nitrogen molecules in the air compining with oxygen molecules

Question 34

in a closed feed and condensate system the drain from the second stage air ejector returns directly to the

Answer 34

atmospheirc drain tank

Question 35

Skip

Answer 35

Skip

Question 36

Skip

Answer 36

Skip

Question 37

Some forms of Clayton Steam Generators utiliz a ____ for precise and repeatable control of fuel to the furnace

Answer 37

Quadrant cam and plunger assembly

Question 38

Which statement listed represents a vital function of the main condenser?

Answer 38

The recovery of feed water for reuse

Question 38

Which statement listed represents a vital function of the main condenser?

Answer 38

The recovery of feed water for reuse

Question 39

Which of the following combustion products can result in the formations of precipitation with a pH higher than normal?

Answer 39

None of the above

Question 39

Which of the following combustion products can result in the formations of precipitation with a pH higher than normal?

Answer 39

None of the above

Question 40

Where might ot most likely find pressure guages and/or transmitters ina gaseous fuel service system at a commercial shore side plant?

Answer 40

All of the above

Question 40

Where might ot most likely find pressure guages and/or transmitters ina gaseous fuel service system at a commercial shore side plant?

Answer 40

All of the above

Question 41

Normally, gaseous fuel vent solenoid lines are typically routed to

Answer 41

Atomosphere away from the burner assembly

Question 41

Normally, gaseous fuel vent solenoid lines are typically routed to

Answer 41

Atomosphere away from the burner assembly

Question 42

Which of the following statements concerning fuel oil supply system for propulsion plants is false?

Answer 42

Reactive vanadium compounds can cause excessive corrosion in boiler generating tubes

Question 42

Which of the following statements concerning fuel oil supply system for propulsion plants is false?

Answer 42

Reactive vanadium compounds can cause excessive corrosion in boiler generating tubes

Question 43

Proper mixing and combustion of uel oils in atypical boiler furnace is largely dependent on all of the following factors except

Answer 43

Fuel deliver pressure at the fuel header

Question 43

Proper mixing and combustion of uel oils in atypical boiler furnace is largely dependent on all of the following factors except

Answer 43

Fuel deliver pressure at the fuel header

Question 44

Rotary cup type atomizers are commonly used in which services?

Answer 44

Auxiliary boilers in a varitey of support and system applications

Question 44

Rotary cup type atomizers are commonly used in which services?

Answer 44

Auxiliary boilers in a varitey of support and system applications

Question 45

Flame impingement in refractory tube membrane walls and all other furnace components will have what effects?

Answer 45

Quenching the flame, producing high amounts of carbon monoxide

Question 45

Flame impingement in refractory tube membrane walls and all other furnace components will have what effects?

Answer 45

Quenching the flame, producing high amounts of carbon monoxide

Question 46

An oil with a high viscosity index might typically be described according to the following statement

Answer 46

Proportionately larger temp changes are required in order to effect a significant change in viscosity as compared to an oil of low index

Question 46

An oil with a high viscosity index might typically be described according to the following statement

Answer 46

Proportionately larger temp changes are required in order to effect a significant change in viscosity as compared to an oil of low index

Question 47

Return flow atomizers offers the operational advantage of

Answer 47

Higher turn-down ration than straigh-through atomizers on account of increased ease of control

Question 47

Return flow atomizers offers the operational advantage of

Answer 47

Higher turn-down ration than straigh-through atomizers on account of increased ease of control

Question 48

The air register design shon in Fig 8 is most likely

Answer 48

?

Question 48

The air register design shon in Fig 8 is most likely

Answer 48

?

Question 49

What is the primary means by which gaseous fuels are admitted to most burner registers

Answer 49

Drilled rings, manifold spuds and canes

Question 49

What is the primary means by which gaseous fuels are admitted to most burner registers

Answer 49

Drilled rings, manifold spuds and canes

Question 50

Parallel zone air registers often offer the following significan advvantages of traditional radial door pregisters

Answer 50

Good reductions in thermal NOx and los excess O2 in stack gasses

Question 50

Parallel zone air registers often offer the following significan advvantages of traditional radial door pregisters

Answer 50

Good reductions in thermal NOx and los excess O2 in stack gasses

Question 51

The air flow that facilitates combustion in the region of the oil burner tip and provides primary swirl turbulence right along the guide tube is the

Answer 51

Primary air flowing along the guide tube and through the diffuser

Question 51

The air flow that facilitates combustion in the region of the oil burner tip and provides primary swirl turbulence right along the guide tube is the

Answer 51

Primary air flowing along the guide tube and through the diffuser

Question 52

?

Answer 52

?

Question 52

?

Answer 52

?

Question 53

?

Answer 53

?

Question 53

?

Answer 53

?

Question 54

Fuel oil solenoids at the burner fronts should be of the manual reset type to

Answer 54

Prevent the furnace from filling with oil after power restoration

Question 54

Fuel oil solenoids at the burner fronts should be of the manual reset type to

Answer 54

Prevent the furnace from filling with oil after power restoration

Question 55

The variable capacity pressure atomizing fuel oil burner functions to

Answer 55

Provide a wide range of combustion

Question 55

The variable capacity pressure atomizing fuel oil burner functions to

Answer 55

Provide a wide range of combustion

Question 56

The process of breaking up fuel into fine particles ot ensure good combustion is called

Answer 56

Atomizing

Question 56

The process of breaking up fuel into fine particles ot ensure good combustion is called

Answer 56

Atomizing

Question 57

Boilers Rules:

Answer 57

1. Don't be an idiot 2. Never add energy unless it has somewhere to go of your choice 3. If you want steam, you need water 4. Minimize delta T and P - don't rush 5. Always have a backup plan 6. Never close DSH inlet on a operating boiler 7. Never bottom blow when boiler is firing unless equipped with a continuous blowdown

Question 58

Clayton steam generators for creation of saturated steam under a variety of loads

Answer 58

Flash chamber and steam trap

Question 59

Sectonal boilers

Answer 59

no steam drum

Question 60

Oli fired are ___ circ | Waste hear are ____ circ

Answer 60

Natural | Foreced circ on comercial diesel vessels

Question 61

Standard A frame __ pressure steam output

Answer 61

Low

Question 62

Primary source of heat to a steam boiler

Answer 62

exhaust heat from one or more gas turbine generator units

Question 63

Benson type shore side

Answer 63

High pressure forced circ due to operating near critical point

Question 64

HP feed heater increased overall efficiency

Answer 64

using latent heat of steam to heat water to steam drum rather than sea water

Question 65

D-type boiler requires close

Answer 65

water chemistry maintenance

Question 66

All waste heat boilers are ____ circ

Answer 66

forced

Question 67

The primary steam supplied to a typical marine contaminated steam generator control regulator usually comes from

Answer 67

the live desuperheated steam via a reducing station

Question 68

At normal sea speed a typical 150# exhaust steam system recieves the bulk of its supply steam from

Answer 68

HP bleed on extraction point

Question 69

At normal sea speeds the 900# propulsion plant operates around

Answer 69

35 psi

Question 70

In a closed feed and condensate system the drain from the HP feed heater returns to

Answer 70

Deaerating feed tak or DC heater

Question 71

Typical modern day liquid fuel oil service is usually fitted with

Answer 71

Solenoid operated double automatic block valves with a bleed between them going back to the tank

Question 72

Difference between solenoid and actuator

Answer 72

Solenoid - open or closed | Actuator - variable

Question 73

Regulator is looking at ____ | Pressure reducer is looking at _____

Answer 73

signal to change ouput | incoming and reduces

Question 74

Turndown Ratio

Answer 74

Max safe sustainable fuel flow /over/ minimum safe sustainable fuel flow

Question 75

Good indicator or efficiency for boiler

Answer 75

Stack temp and O2 content

Question 76

Discharge vane employed on forced draft fan

Answer 76

Mid to high range

Question 77

Parralell flow

Answer 77

solid biomass less flame adjustment

Question 78

Balanced draft combustion air schemes employed on shore side to

Answer 78

maintain constant controlled forced and induced

Question 79

Draft damper employed low to moderate range

Answer 79

inlet vane

Question 80

emissions least controlled by choice of air register design

Answer 80

oxides of sulfur

Question 81

Oil atomizes highest degree of flame shaping

Answer 81

ventur multi jet

Question 82

lowest practical excess O2

Answer 82

parallel

Question 83

Decrease boiler load

Answer 83

decrease fuel then decrease air

Question 84

Rotary cup used for

Answer 84

ship and shoreside aux and heating plants

Question 85

Passivation

Answer 85

makes the coating to prevent rust

Question 86

Single double and triple element control

Answer 86

level, steam flow, feed flow

Question 87

Feed water regulations

Answer 87

2 systems of measurement, 1 is a sight flass, and two indemendant pipes f or feedwater into boiler

Question 88

Types of burners

Answer 88

``` inline duct - HRSG Circumfirential- flame shape, high turndowon Axial/Radial - simple, rugged, old Distributed - low NOx Parallel - low O2 decent NOx Scroll - biomass Rotary cup - compact, simple ```