UTA8 Boilers

Question 1

All sprinkler systems have how many basic components? (Page 8- 1)

Answer 1

Three

Question 2

What sprinkler system is the most common type? (Page 8-1)

Answer 2

Wet pipe

Question 3

n a dry pipe sprinkler system, the pipes normally contain either air or what under pressure? (Page 8-2)

Answer 3

Nitrogen

Question 4

The differential dry pipe valve has a large clapper on the air side that bears directly on a smaller water side clapper. The differential between the areas of the two clappers is approximately what ratio? (Page 8-4)

Answer 4

6:1

Question 5

To eliminate an accidental trip of the valve and false alarms, air pressure should be maintained at least what psi greater than the calculated trip pressure of the dry pipe valve? (Page 8-4)

Answer 5

20

Question 6

What kind of system is used where there is an extra hazard, suchas areas where flammable liquids or pro- pellants are handled or stored, or where there is a possibility that a fire might grow faster than ordinary sprinkler systems can control? (Page 8-7)

Answer 6

Water deluge

Question 7

What are nozzles placed at intervals along the piping network to distribute a uniform pattern of water on the area being protected? (Page 8-9)

Answer 7

Sprinklers

Question 8

Sprinklers have orifices ranging in size from 1/4-inch to 1/2-inch diameter graduated by what size increments? (Page 8-9)

Answer 8

1/16-inch

Question 9

What give different patterns of water distribution and allow the sprinkler to be placed in various locations such as upright, pendent, or sidewall? (Page 8-9)

Answer 9

Deflectors

Question 10

There are basically four types of release mechanisms for automatic sprinklers. They are the fusible link, frangible bulb, frangible pellet, and what else? (Page 8-10)

Answer 10

Bimetallic element

Question 11

What devices are used to prevent water freezing in fire protection systems? (Page 8-18)

Answer 11

Temperature supervisory

Question 12

The combined water needed for all fire-fighting equipment is known as the what? (Page 8-18)

Answer 12

Fire flow demand

Question 13

Temperature ratings for soldered link sprinklers should be 50F above (for quartz bulb sprinklers what above) normal room temperature? (Page 8-20)

Answer 13

25F

Question 14

Where sprinklers are installed in areas where there is stockpiling of materials a clearance of at least how many inches under the sprinklers is necessary for proper water distribution? (Page 8-20)

Answer 14

18

Question 15

Perform a 2-inch drain test at least how often to test alarm check valves? (Page 8-20)

Answer 15

Quarterly

Question 16

Certain mechanical dry pipe valves are designed to trip at a fixed pressure of 10 to 15 psi. Maintain what psi air pressure on these valves? (Page 8-22)

Answer 16

30

Question 17

Full operational testing of high-speed suppression systems is conducted at intervals not to exceed how many years except when mission requirements justify change? (Page 8-24)

Answer 17

3

Question 18

What type of extinguishing systems are generally found in areas where equipment is installed that would be highly vulnerable to destruction from water or dry chemical extinguishing agents? (Page 8-24)

Answer 18

Gaseous

Question 19

Gaseous extinguishing systems can be divided into three general categories: local application, total flooding, and what else? (Page 8- 24)

Answer 19

Hose line systems

Question 20

At present, what is the only gaseous agent approved for manual hose line systems? (Page 8-24)

Answer 20

Carbon dioxide

Question 21

High-pressure carbon dioxide extinguishing systems require refilling and hydrostatic testing every how many years? (Page 8-26)

Answer 21

12

Question 22

Generally, Halon 1211 and Halon 1301 are used in total flooding applications. For effective fire-fighting purposes, a minimum concentration of what percent is recommended for total flooding systems for surface fires of ordinary combustibles? (Page 8-29)

Answer 22

5

Question 23

Halon 1211 is toxic to people when concentrations exceed what percent? (Page 8-29)

Answer 23

4

Question 24

Halon1301 is stored in a cylinder super pressurized with nitrogen to what psi (at 70°F) to provide an expellant pressure for the agent in excess of the agent’s normal vapor pressure? (Page 8-29)

Answer 24

600

Question 25

Because of the high ozone depletion factor of halons, installation of new Halon 1301 systems are prohibited except by special approval from what? (Page 8-29)

Answer 25

NAVFACENGCOM

Question 26

Halon 1301 is the least toxic of the halongenated gases and does not harm personnel when concentrations are below what percent? (Page 8-29)

Answer 26

10

Question 27

Test electrically operated release devices for gaseous extinguishing systems at least how often? (Page 8-32)

Answer 27

Annually

Question 28

How many general categories of chemical extinguishing systems are there? (Page 8-33)

Answer 28

Three

Question 29

What systems are arranged to discharge dry chemical directly on the hazard, without any enclosure? (Page 8-34)

Answer 29

Local application

Question 30

Dry chemical used in approved systems is mostly what? (Page 8- 34)

Answer 30

Sodium bicarbonate

Question 31

(True or False) When selecting a site for boiler installation, the availability of water, electricity, fuel, and natural drainage should be considered.

Answer 31

True

Question 32

When must boilers be inspected for integrity of welds and nozzle connections?

Answer 32

At 5 year intervals

Question 33

Operator boiler plant logs are arranged for use over a 24-hour period, consisting of how many shifts?

Answer 33

Three 8-hour shifts

Question 34

What effect of inadequate or improper water conditioning causes pitting of metal in boilers, and steam and condensate in piping?

Answer 34

Corrosion

Question 35

What chemical is used for internal boiler water treatment to prevent oxygen corrosion in boilers?

Answer 35

Sodium sulfite | Na2SO3

Question 36

What boiler operator maintenance responsibility is required to keep a boiler running continuously at its original capacity and efficiency? A. Keeping equipment in service for maximum periods of time. B. Determining any flaws so equipment can be removed in time to prevent serious damage. C. Performing minor repairs on equipment that has been removed from service to minimize outage time. D. All of the above

Answer 36

D. All of the above

Question 37

How often should a PMI be done on the boiler room drains of a hot-water boiler

Answer 37

Monthly

Question 38

(True or False) Water that is contained in an idle boiler should be sampled and analyzed monthly.

Answer 38

False | Weekly

Question 39

How often should the internal inspections of wet or dry lay-up boilers be conducted?

Answer 39

Annually

Question 40

What waterside damage is the result of mechanical causes and not corrosion?

Answer 40

Waterside abrasion

Question 41

What action should be taken when defects are discovered during a waterside inspection of drums and headers? A. Report defects to the maintenance officer. B. Record defects in the maintenance log. C. Record defects in the boiler water treatment log. D. All of the above

Answer 41

D. All of the above

Question 42

Boiler firesides are inspected for signs of damage and deterioration when the boiler is secured for fireside cleaning. At what other intervals should this type of inspection be conducted?

Answer 42

Every time the boiler is secured

Question 43

What two types of slag-forming materials cause the most damage to boiler refractories?

Answer 43

Vanadium salts and sodium chloride

Question 44

What term is used to describe any opening in a tube that is not associated with tube enlargement?

Answer 44

Perforation

Question 45

What term is applied to tubes that appear to have dropped downward toward the furnace under their own weight?

Answer 45

Sagging

Question 46

Which condition should be looked for when conducting a steam and water piping inspection? A. Excessive expansion and contraction B. Undue vibration in piping connections to the boiler C. Leaking water column connections D. All of the above

Answer 46

D. All of the above

Question 47

What step should be taken to test the operation of a float-activated low-water fuel cutoff device?

Answer 47

Drain the float bowl to the low-water level.

Question 48

Venting should be held to a minimum to preclude what condition in the feedwater?

Answer 48

Oxygen entrainment

Question 49

``` What indications of trouble should the boiler plant supervisor be able to identify? A. Strange noises B. Unusual vibrations C. Abnormal temperatures D. All of the above ```

Answer 49

D. All of the above

Question 50

What term is commonly used to describe the universal solvent?

Answer 50

Water

Question 51

What term is used for deposits on tubes and other internal surfaces caused by calcium salts, magnesium salts, and insoluble materials?

Answer 51

Scale

Question 52

What is the only sludge dispersant approved by NAVFAC for use in shore-based boilers?

Answer 52

Quebracho tannin

Question 53

Which condition inside a boiler is caused by a small amount of seawater in the feedwater?

Answer 53

Heavy sludge

Question 54

Feedwater or makeup water tanks should be maintained within what temperature range?

Answer 54

180°F to 200°F

Question 55

What two types of solids are present in most boiler water?

Answer 55

Suspended and dissolved solids

Question 56

How many pounds of steam per hour are produced by one boiler horsepower?

Answer 56

34.50

Question 57

What person is the most important member of a boiler plant maintenance team?

Answer 57

Operator

Question 58

What is formed when soot mixes with water?

Answer 58

Sulfuric acid

Question 59

Which component will have a lower melting point if soot and other deposits are left on boiler brickwork?

Answer 59

Refractories

Question 60

What two methods can be used to boil out the watersides of a boiler?

Answer 60

Sodium metasilicate pentahydrate and trisodium phosphate

Question 61

What chemical should be added to the water when laying-up a boiler using the wet method?

Answer 61

Sodium sulfite

Question 62

(True or False) Laying-up a boiler by the dry method should be used when a boiler is scheduled to be out of service because it could freeze.

Answer 62

True

Question 63

The most common type of boiler in the NCF is the what? (Page 12-1)

Answer 63

Scotch marine

Question 64

When you are preparing to install a boiler, consider three basic factors-site location, accessories, and what else? (Page 12-1)

Answer 64

Fittings

Question 65

Boilers may vary in wet weight from 1.5 tons to more than how many tons? (Page 12-1)

Answer 65

20

Question 66

What is a peculiar type of heat blistering that occurs when the boiler water is contaminated with oil? (Page 12-12)

Answer 66

Tube Corrugation

Question 67

In general, most hydrostatic tests are made at one of three test pressures: boiler design pressure, 125% of design pressure, or what percent of design pressure? (Page 12-13)

Answer 67

150%

Question 68

At how many-year intervals, each boiler must be inspected for integrity of welds and nozzle connections? (Page 12-14)

Answer 68

5

Question 69

What term is used to describe the metal loss that occurs in bands or stripes around the circumference of a tube? (Page 12-17)

Answer 69

Circumferential groove

Question 70

What is a broad term used to cover all of the ash products (other than slag) that result from combustion? (Page 12-23)

Answer 70

Soot

Question 71

When more than one relief valve is provided on either hot-water heating or hot-water supply boilers, the additional valve (or valves) may be set within a range not to exceed what percent of the lowest pressure to which any valve is set? (Page 12-26)

Answer 71

20%

Question 72

What is called the universal solvent? (Page 12-31)

Answer 72

Water

Question 73

A glass of tap water at 68°F contains how many ppm of oxygen? (Page 12-31)

Answer 73

9.0

Question 74

When water evaporates in a boiler, the hard components that were in the water, such as calcium salts, magnesium salts, and other insoluble materials, form deposits on the tubes and other internal surfaces. These deposits are known as what? (Page 12-31)

Answer 74

Scale

Question 75

The first two chemicals to be considered for boiler water treatment of shore-based boilers are caustic soda and what else? (Page 12-33)

Answer 75

Sodium phosphate

Question 76

What is the deterioration of metal by Chemical action? (Page 12- 35)

Answer 76

Corrosion

Question 77

The chemical most commonly used in oxygen removal is what? (Page 12-35)

Answer 77

Sodium sulfite

Question 78

What is the production of froth or unbroken bubbles on the surface of the boiler water? (Page 12-36)

Answer 78

Foaming

Question 79

What is the principal cause of equipment failure? (Page 12-38)

Answer 79

Dirt

Question 80

What is a system of routine inspections of equipment recorded for future reference on some type of inspection record? (Page 12-38)

Answer 80

Preventive maintenance inspection (PMI)

Question 81

When soot is allowed to remain on the boiler firesides for any length of time, the sulfur in the soot combines with moisture and forms what? (Page 12-40)

Answer 81

Sulfuric acid

Question 82

Although there are a number of cleaning methods available (such as hot-water washing, wet-steam lancing, and so forth), what should be considered the basic and preferred method of cleaning firesides? (Page 12-40)

Answer 82

Mechanical cleaning

Question 83

There are two approved methods for boiling out boilers—the sodium metasilicate pentahydrate method and what other method? (Page 12-41)

Answer 83

Trisodium phosphate

Question 84

What should be used when a boiler is scheduled to be out of service for a long period of time or when a boiler is in danger of freezing? (Page 12-42)

Answer 84

Dry lay-up