Fy14 Ut Basic Chapter 9 Boilers

Front 1

9-1. An increase in pressure results in what effect on the boiling point temperature of water? A. Increase B. Decrease C. Sharp decrease, then gradually increasing D. No effect on temperature

Back 1

A. Increase

Front 2

9-2. What is the difference between dry saturated steam and wet statured steam? A. Temperature B. Water particles in suspension C. Condensation level D. Absence of water particles in suspension

Back 2

D. Absence of water particles in suspension

Front 3

9-3. Which description identifies a water-tube boiler? A. Products of combustion pass through the tubes and the water surrounds them. B. Only water and diesel fuel are used to generate steam. C. Products of combustion surround the tubes through which the water flows. D. Only vertical tubing for water passage is found in fire-tube boilers.

Back 3

C. Products of combustion surround the tubes through which the water flows.

Front 4

9-4. In a water-tube boiler, how are baffles usually arranged? A. Directly across the tubes twice prior to being discharged from the boiler. B. Directly parallel with the tubes three times prior to being discharged from the boiler. C. Directly parallel with the tubes twice prior to being discharged from the boiler. D. Directly across the tubes three times prior to being discharged from the boiler.

Back 4

D. Directly across the tubes three times prior to being discharged from the boiler.

Front 5

9-5. Which is NOT a type of fire-tube boiler? A. Horizontal supply tubular B. Firebox C. Scotch marine D. Vertical tube

Back 5

A. Horizontal supply tubular

Front 6

9-6. Which safety device provides added protection against low-water conditions? A. Ball limit switch B. Fusible plug C. Low level transducer D. Over-temperature rheostat

Back 6

B. Fusible plug

Front 7

9-7. Which type of fire-tube boiler are UTs assigned to operate and maintain more often than any other type? A. Vertical tube B. Scotch marine C. Horizontal fire-tube D. Firebox

Back 7

C. Horizontal fire-tube

Front 8

9-8. Where is the blowdown pipe of a vertical tube boiler attached on the water leg? A. Uppermost part B. Midway point of pipe C. Upper and lower parts of pipe D. Lowest part

Back 8

D. Lowest part

Front 9

9-9. Gas flows into the horizontal return tubular boiler from what component? A. Firebox B. Drum C. Shell D. Breaching

Back 9

A. Firebox

Front 10

9-10 Where are the manholes located on a horizontal return tubular boiler? A. Upper part of shell B. Upper and lower part of the shell C. Lower part of shell D. No manholes associated with this type of boiler

Back 10

B. Upper and lower part of the shell

Front 11

9-11 What is the position of the air cock prior to firing a cold boiler with no steam pressure? A. Shut B. Open bleed position C. Open D. Bypass

Back 11

C. Open

Front 12

9-12 Which piece of equipment facilitates the removal of gases through the stack? A. Excavation blower B. Forced raft fan C. Air cock D. Induced draft fan

Back 12

D. Induced draft fan

Front 13

9-13 Which blowdown valve permits the removal of scale and sediments from the water column? A. Water column blowdown B. Drum water blowdown C. Water leg blowdown D. Sump water blowdown

Back 13

A. Water column blowdown

Front 14

9-14 The fire-actuated plug has a melting point of how many degrees Fahrenheit? A. 435 B. 445 C. 455 D. 465

Back 14

B. 445

Front 15

9-15 Which equipment steadies the water level in the gauge glass through the reservoir capacity of the column? A. Fusible plug B. Breaching C. Water column D. Blowdown valves

Back 15

C. Water column

Front 16

9-16 What are the three lengths associated with the electrode assembly? A. Maximum, Minimum, and Burner cutout B. High, Low, and Burner shutdown C. Open, Shut, and Burner shutdown D. High, Low, and Burner cutout

Back 16

D. High, Low, and Burner cutout

Front 17

9-17 What is the purpose of try cocks? A. To prove the water level in the boiler. B. To increase water level in the boiler. C. To decrease water level in the boiler. D. To release excess steam from the boiler.

Back 17

A. To prove the water level in the boiler.

Front 18

9-18 How many safety valves are required on a boiler that has more than 500 square feet of heating surface? A. 1 B. 2 C. 3 D. 4

Back 18

B. 2

Front 19

9-19 What device on the safety valve is provided to lift the valve from its seat? A. Vent port B. Lifting lever C. Lifting switch D. Vent bonnet

Back 19

B. Lifting lever

Front 20

9-20 A steam injector can lift a stream of water at a temperature of 120°F how many feet? A. 10 B. 12 C. 14 D. 16

Back 20

C. 14

Front 21

9-21 (True or False) The water supply should not be hotter than 120°F for the injector to operate. A. True B. False

Back 21

A. True

Front 22

9-22 What is known as the process of maintaining a difference of pressure between two points in a system? A. Pressure regulating B. Pressure maintaining C. Pressure differential D. Pressure building

Back 22

A. Pressure regulating

Front 23

9-23 Which is NOT a function of the pressure control? A. To control the pressure in the boiler. B. To secure water flow when temperature reaches 500°F. C. To secure the fuel burning equipment when the pressure reaches a predetermined cutout. D. To start fuel burning equipment when the pressure drops to the cut-in point.

Back 23

B. To secure water flow when temperature reaches 500°F.

Front 24

9-24 What are the two settings on the pressure control? A. Cut-out point and differential B. Cut-in point and stabilization C. Cut-in point and differential D. Cut-out and cut-in points

Back 24

A. Cut-out point and differential

Front 25

9-25 Which method is used to controlling combustion air? A. Automatically adjusted air cock B. Automatically adjusted air damper C. Manually adjusted air cock D. Manually adjusted air damper

Back 25

B. Automatically adjusted air damper

Front 26

9-26 What is the only means of obtaining the correct ratio of fuel to air? A. Setting of air damper B. Setting of air transducer C. Setting of air cock D. Setting of differential

Back 26

A. Setting of air damper

Front 27

9-27 In combustion control, what is the normal atomizing pressures in pounds per square inch? A. 50 to 95 B. 95 to 120 C. 110 to 130 D. 150 to 220

Back 27

B. 95 to 120

Front 28

9-28 How many seconds after flame failure will the burner equipment be secured? A. 2 B. 3 C. 4 D. 5

Back 28

C. 4

Front 29

9-29 Safety shutdown sequence will commence after how many seconds after pilot flame is not established and confirmed? A. 2 B. 4 C. 6 D. 7

Back 29

D. 7

Front 30

9-30 Which meter is used as a guide in controlling the relationship between air required and air actually supplied to burn the fuel? A. Combustion air and steam flowmeter B. Steam flowmeter C. Combustion air flowmeter D. Combustion air and water flowmeter

Back 30

A. Combustion air and steam flowmeter

Front 31

9-31 What unit of measurement is associated with drafts? A. Pounds per square inch B. Inches of water C. Microns D. Gallons per minute

Back 31

B. Inches of water

Front 32

9-32 Which are scale-forming elements? A. Silicon and calcium B. Calcium sulfate and precipitates of hardness C. Precipitates of hardness and silica D. Magnesium and iron

Back 32

C. Precipitates of hardness and silica

Front 33

9-33 What type of coating does silica leave behind when it precipitates in boiler feedwater? A. Soft clear B. Hard milky C. Soft opaque D. Hard glossy

Back 33

D. Hard glossy

Front 34

9-34 What is the most widely used method of treatment of scale? A. Alkaline phosphate-tannin B. Softening tanks C. Bed of carbon minerals on inlet line D. Dissolving of oxygen and carbon dioxide

Back 34

A. Alkaline phosphate-tannin

Front 35

9-35 Boilers operating at what pressure are normally used for hot-water generation? A. 20 psi or more B. 15 psi or less C. 15 psi or more D. 25 psi or more

Back 35

B. 15 psi or less

Front 36

9-36 Which reagent is NOT used in the test for hardness? A. Hardness indicator B. Hardness buffer C. Hardness filter D. Hardness titrating solution

Back 36

C. Hardness filter

Front 37

9-37 What function does carbon play in the test for phosphates? A. Sifts out the phosphate chemical B. Makes the tricalcium sludge less filterable C. Breaks up the feedwater D. Absorbs the tannin

Back 37

D. Absorbs the tannin

Front 38

9-38 Concentrated stannous chloride should be discarded after how many months after preparation? A. 2 B. 3 C. 4 D. 5

Back 38

A. 2

Front 39

9-39 At what temperature, in degrees Farhenheit, should the boiler water sample be for the conduct of the caustic alkalinity without tannin test? A. 70 B. 80 C. 120 D. 140

Back 39

A. 70

Front 40

9-40 At what temperature, in degrees Fahrenheit, should the boiler water sample be for the conduct of the caustic alkalinity with tannin test? A. 120 B. 140 C. 160 D. 180

Back 40

C. 160

Front 41

9-41 Prior to conducting the sodium sulfite test, to what temperature, in degrees Fahrenheit, should the boiler water sample be cooled? A. 40 B. 50 C. 60 D. 70

Back 41

D. 70

Front 42

9-42 When the paper turns orange in the conduct of the pH test, what does this indicate to the operator? A. pH is too high. B. pH is too low. C. Increase of caustic soda dosage is required. D. Retest is required.

Back 42

B. pH is too low.

Front 43

9-43 (True or False) The lower the concentration of ionizable salts, the greater the conductance of the sample. A. True B. False

Back 43

B. False

Front 44

9-44 Which cleaning method for fire-side boilers is NOT recommended? A. Scraper cleaning B. Wet steam sweating C. Dry steam lancing D. Hot-water washing

Back 44

C. Dry steam lancing

Front 45

9-45 When utilizing the hot-water washing method, at what temperature, in degrees Fahrenheit, should the water be? A. 120 B. 130 C. 140 D. 150

Back 45

D. 150

Front 46

9-46 How is fireside slag removed from the convection super heaters? A. By circulating cold water through the tubes. B. By using a high pressure hot-water washer. C. By increasing output boiler temperature. D. By using a wire brush on the interior side of tubes.

Back 46

A. By circulating cold water through the tubes.

Front 47

9-47 How is water corrosion reduced? A. Keeping dissolved oxygen levels high. B. Maintaining the boiler water alkalinity at proper levels. C. Replacing cathodic anodes monthly. D. Maintaining the boiler water acidity at proper levels.

Back 47

B. Maintaining the boiler water alkalinity at proper levels.

Front 48

9-48 After a safe shutdown of the boiler, what is required prior to commencing tube cleaning? A. Boiler water temperature to 65°F B. Tube clearance tolerances verified C. Adequate ventilation D. Blowdown of internal components

Back 48

C. Adequate ventilation

Front 49

9-49 (True or False) The lower ends of all tubes must be cleaned from the water drum or header. A. True B. False

Back 49

A. True

Front 50

9-50 Which acid is NOT required in chemical cleaning of boilers? A. Boric B. Sulfuric C. Citric D. Sulfamic

Back 50

A. Boric

Front 51

9-51 What is the purpose of citric acid? A. Removal of all conductance properties from tube. B. Removal of boiler waterside deposits. C. Formation of corrosion-eating organisms. D. Removal of boiler fireside deposits.

Back 51

B. Removal of boiler waterside deposits.

Front 52

9-52 What are the two methods of boiler acid treatments? A. Circulation or soak B. Inhibited or fill-and-soak C. Circulation or fill-and-soak D. Reactive and fill

Back 52

C. Circulation or fill-and-soak

Front 53

9-53 Which is NOT a neutralizing solution? A. Soda ash B. Trisodium phosphate C. Sodium tripolyphosphate D. Calcium sulfate

Back 53

D. Calcium sulfate

Front 54

9-54 When conducting the boiling out method, the temperature of the water in the boiler needs to be at what degree Fahrenheit for at least 24 to 48 hours? A. 180 B. 190 C. 200 D. 210

Back 54

C. 200

Front 55

9-55 What is the most common cause of major boiler damage? A. Bent tubes B. Low water C. Warped water columns D. High sludge buildup

Back 55

B. Low water

Front 56

9-56 How often are blowdown valves opened? A. Once a watch B. Once daily C. Twice a watch D. Twice daily

Back 56

B. Once daily

Front 57

9-57 How often are steam traps tested for correct operation? A. Once a watch B. Once a day C. Once a week D. Once a month

Back 57

D. Once a month

Front 58

9-58 The clearance between the shoulder of a manhole plate and the manhole must not exceed what value? A. 1/16 inch B. 1/8 inch C. 1/4 inch D. 5/8 inch

Back 58

A. 1/16 inch

Front 59

9-59 How often is a hydrostatic test performed on a boiler? A. Weekly B. Monthly C. Quarterly D. Annually

Back 59

D. Annually

Front 60

9-60 In a hydrostatic test, what is the minimum water temperature of the boiler, in degrees Fahrenheit? A. 50 B. 60 C. 70 D. 80

Back 60

C. 70

Front 61

9-61 On boilers where the superheated steam reaches 850°F or higher, what material is the super heater tubes constructed out of? A. Chromium-molybdenum iron B. Carbonmolybdenum brass C. Chromium-nickel copper D. Carbonmolybdenum steel

Back 61

D. Carbonmolybdenum steel

Front 62

9-62 What tool is used to remove tubes? A. Air-powered side-cutting chisel B. Arc welding equipment C. Engineer’s hammer D. Carbonate tip chainsaw

Back 62

A. Air-powered side-cutting chisel

Front 63

9-63 Tubes of 2 inches outside diameter are belled to what minimum distance, in inches? A. 5/8 B. 7/16 C. 1/8 D. 7/8

Back 63

C. 1/8

Front 64

9-64 What is the maximum projection into the drum or header for tubes of 2 inches outside diameter? A. 5/8 B. 7/16 C. 3/4 D. 7/8

Back 64

B. 7/16

Front 65

9-65 After the repair of boiler refractories, how many hours must the wall dry with the burner shutters open? A. 4 B. 6 C. 8 D. 12

Back 65

D. 12

Front 66

9-66 Plastic requires a baking-out temperature range of what value, in degrees Fahrenheit? A. 2900 to 3000 B. 3000 to 3100 C. 3200 to 3300 D. 3300 to 3400

Back 66

A. 2900 to 3000

Front 67

9-67 When should the head gasket be inspected? A. Whenever front door is opened. B. Whenever rear door is opened. C. Whenever both front and rear doors are opened. D. Whenever bottom door is opened.

Back 67

C. Whenever both front and rear doors are opened.

Front 68

9-68 How many phases of operation are associated with boiler operation? A. 1 B. 3 C. 5 D. 7

Back 68

D. 7

Front 69

9-69 Pre-operating checks are performed at what time of boiler operation? A. Before lining up and lighting off B. Before lining up C. Before lighting off D. Before fuel onload

Back 69

A. Before lining up and lighting off

Front 70

9-70 During normal operation of the boiler, how many responsibilities does the operator have? A. 1 B. 2 C. 3 D. 4

Back 70

B. 2

Front 71

9-71 At what temperature, in degrees Fahrenheit, should the flue-gas temperature be above the steam-produced temperature? A. 120 B. 130 C. 150 D. 170

Back 71

C. 150

Front 72

9-72 How many inches of water should the draft be under normal operating conditions? A. 0.01 to 0.03 B. 0.02 to 0.04 C. 0.03 to 0.06 D. 0.05 to 0.08

Back 72

C. 0.03 to 0.06

Front 73

9-73 When should the drum vent valve be opened during normal operations? A. Drum pressure drops to 25 psig. B. Drum pressure rises to 50 psig. C. Drum pressure drops to 15 psig. D. Drum pressure rises to 25 psig.

Back 73

A. Drum pressure drops to 25 psig.

Front 74

9-74 At what temperature, in degrees Fahrenheit, can the boiler be emptied? A. Below 200 B. Below 300 C. Below 400 D. Below 500

Back 74

A. Below 200

Front 75

9-75 How many emergency situations should the operator be aware of when running a boiler? A. 2 B. 4 C. 6 D. 8

Back 75

C. 6

Front 76

9-76 The boiler operating log is set up on what frequency for logkeeping? A. 12-hour period divided into three 4-hour shifts B. 12-hour period divided into four 3-hour shifts C. 24-hour period divided into three 8-hour shifts D. 24-hour period divided into four 6-hour shifts

Back 76

C. 24-hour period divided into three 8-hour shifts

Front 77

9-77 At shore installations, the handles on pull chains to boiler water gauge cocks are colored; which color is associated with opening water-gauge glass stop valve? A. White B. Yellow C. Red D. Green

Back 77

A. White

Front 78

9-78 What device is used to hold a switch lever in the off position? A. Tagout B. Lockout C. Stark D. Bendel

Back 78

B. Lockout