Heating Steamfitter 3Rd Year

Front 1

What is the disadvantage or limitation of a fire tube boiler?
.

Back 1

As pressure and temperature are increased, the thickness of the shell will also increase

Front 2

A water tube boiler is considered to be a boiler that has?

Back 2

Two drums and tube system used for direct heat transfer

Front 3

Steam generating units used in a power generation primarily produce?

Back 3

Superheated steam

Front 4

A miniature boiler is built/ manufactured in accordance with?

Back 4

ASME Section 1

Front 5

A direst fired boiler with a maximum steam pressure of 207kpa (30psig) is constructed in accordance with?

Back 5

ASME Section 1

Front 6

A heating boiler is built in accordance with?
ASME section 4

Back 6

ASME section 4

Front 7

The feed water distributor pipe is installed in the boiler?

Back 7

steam drum

Front 8

Internal separators will produce

Back 8

Dry saturated steam

Front 9

what device will a power generation steam plant use between the high pressure and lower pressure turbines?

Back 9

Reheaters

Front 10

What is the primary function of an internal separator?

Back 10

To separate wet saturated steam into dry superheated steam.

Front 11

the two types of superheaters are?

Back 11

convection and radiant

Front 12

The feed water distribution pipe is located in the?

Back 12

Lower space of the steam drum

Front 13

Retractable soot blowers are used for cleaning?

Back 13

radiant super heaters (stuff inside the furnace)

Front 14

The piping system from the steam generator to the turbine would be built in accordance to?

Back 14

ASME B31.1 Power piping

Front 15

When rating a steel high pressure boiler the agency that would do this service is

Back 15

SBI( Steel boiler institute)

Front 16

Boilers built to ASME section 1 scope are

Back 16

Gross rated

Front 17

A process/heating boiler is rated at 1660000Btu. What is the EDR rating (steam)?

Back 17

6916

Front 18

A steam boiler rated for 60psig will produce 750BHP how many pounds of steam per hour is the boiler capable of producing?

Back 18

25875 ( 750 x 970)

Front 19

A high pressure boiler producing 12493lb/hr of steam would have a gross rating of

Back 19

12121.8MBH

Front 20

What principle is not normally used for rating high pressure boilers

Back 20

Ft2 of heating surface

Front 21

The Valve that acts as a safety first valve to prevent a backflow of steam is a

Back 21

Stop and check valve

Front 22

On a water tube boiler the feed water line is installed in the steam drum at

Back 22

A level slightly below the normal operating water line

Front 23

The water level in the boiler is controlled by a

Back 23

Continuity probe

Front 24

The max size of the blow off line is

Back 24

2.5 inches

Front 25

The min size for water column connections from the boiler is

Back 25

1 inch

Front 26

The item or trim that does not require a pressure gauge is the

Back 26

Gauge glass

Front 27

Safety valves shall be located on the

Back 27

Reheaters

Front 28

Instrumentation, controls and interlocks are found in

Back 28

ASME Section 6

Front 29

On a fire tube boiler the burner section is located in the

Back 29

Furnace

Front 30

A retractable soot blower on a water tube boiler is found in

Back 30

The furnace area

Front 31

Troubleshooting fuel controls and valves would best be handled by a

Back 31

Gasfitter

Front 32

Troubleshooting large moving equipment such as fans and ball mills would best be handled by a

Back 32

Millwright

Front 33

Blow off piping on a HP Boiler is covered under ASME code

Back 33

Section 1

Front 34

The Max size of blow off piping is

Back 34

2.5inchs

Front 35

The code that allows to discharge 75 c ( 170 f) of effluent into a drain is

Back 35

The national plumbing code of Canada

Front 36

A boiler feed water pump must be capable of delivering water pressure 3% greater than

Back 36

A relief valve

Front 37

A LP steam pump and receiver generates a max 138kpa (20psig) as per

Back 37

Section 4

Front 38

A pressure powered pump uses this energy force for power

Back 38

Steam

Front 39

The type of heat that a desuperheater controls is

Back 39

Sensible heat

Front 40

The type of force required on a venturie to move the boiler feed water is a

Back 40

Vacuum

Front 41

The bypass valve on a water makeup solenoid valve is normally a

Back 41

Plug globe valve

Front 42

If the economizer has a control valve incorporated upstream of the device

Back 42

it must have a SRV

Front 43

If the wrong valves are installed in the wrong locations on a blow off assembly you would most likely encounter this type of major damage to the valve/ valves

Back 43

Wire drawing

Front 44

On blow off vessel rendered 100% safe to work on what item must be checked before removing the hand hole/man way

Back 44

Pressure gauge

Front 45

The device required downstream of a turbine to produce clean dry steam is the

Back 45

Oil separator

Front 46

During shutdowns and scheduled maintenance this item must be inspected and verified to be reliable on the economizers

Back 46

SRV

Front 47

The desuperheater will have a buildup of material internally if you have poor quality

Back 47

Demineralized water

Front 48

Where does flash steam get heat from

Back 48

HP condensate

Front 49

What ASME section covers pressure vessels greater than 42.5 liters (1.5cu ft)?

Back 49

VIII

Front 50

A pressure relief valve is designed to relieve vapour?

Back 50

False

Front 51

Vessels serving as a cushion tank with a capacity of 454 liters (120 US gal) or less are not covered by ASME section I

Back 51

True

Front 52

What is a pressure relief device designed to do?

Back 52

Reclose after opening

Front 53

What is a rupture disc activated by?

Back 53

Inlet static pressure

Front 54

All pressure vessels within the scope of ASME Section VIII shall be protected with over pressure protection?

Back 54

True

Front 55

Where should a safety pop valve be located?

Back 55

In the vapour space of the pressure vessel

Front 56

What must the minimum inlet size be when two or more pressure reliefing devices are placed on one outlet of the pressure vessel?

Back 56

Combined area of the inlets of the relief devices

Front 57

Where there is a double seated valve gives the best service.

Back 57

Constant demand

Front 58

What type of valve is a pressure reducing valve?

Back 58

Automatic valve

Front 59

What is the recommended turn down ratio from the high pressure side to the low pressure side of a pressure reducing valve?

Back 59

10 to 1

Front 60

When PRV’s are piped in series what should the spacing between the valves be?

Back 60

10ft

Front 61

Sustained flows 5% below Cause valve seats to?

Back 61

erode.

Front 62

What is the condition in a pressure reducing valve where the valve disc is throttling close to its seat and does not know whether to open or close?

Back 62

Hunting

Front 63

The simplest of the pressure reducing valves is the ?

Back 63

Single seated valve

Front 64

What is the recommended change in pipe sizes before or after a pressure reducing valve?

Back 64

1 or 2 pipe sizes

Front 65

What will turning the set screw or the hand wheel clockwise on a single seated PRV change?

Back 65

Increase down stream pressure

Front 66

What is to be provided when the downstream equipment is designed for a pressure lower than the supply pressure entering a pressure reducing valve?

Back 66

A safety or pressure relief valve

Front 67

When steam is the primary heat source how should a strainer be installed in the piping to the pressure reducing valve?

Back 67

On its side

Front 68

1The Cv factor is determined experimentally and gives the GPM of water that a valve will pass with what pressure drop?

Back 68

1.0 psi

Front 69

Excessive velocity through a pressure reducing valve will result in

Back 69

Noise

Front 70

Condensate from the steam entering the pressure reducing valve should be removed by a?

Back 70

Separator

Front 71

What are two gases used to pressurize a HTHW system?

Back 71

Steam and Nitrogen

Front 72

What type pf vent is used on a HTHW system?

Back 72

Manual

Front 73

How does the HTHW boiler differ from a HP steam boiler?

Back 73

Boiler Nozzle

Front 74

System pressure is maintained above saturation temperature so HTHW will flash?

Back 74

False

Front 75

How does LP steam created in a HTHW system

Back 75

Immersion generator

Front 76

Why is the systempressure maintained above saturation temperature of water?

Back 76

So HTHW will not flash to steam

Front 77

Why can smaller diameter lines be used for HTHW systems?

Back 77

HTHW has a higher thermal capacity

Front 78

Why is the expansion drum elevated when using a steam pad for pressurization?

Back 78

To prevent a cavitation of the pumps

Front 79

All boilers for HTHW systems are designed in accordance with ASME Section I

Back 79

True

Front 80

Which Alberta authority has the power to enforce the ASME regulations?

Back 80

ABSA

Front 81

What registered CRN is given for New Brunswick?

Back 81

7 (2 for Alberta) {refer to chart on pg 16 of HTHW plants 305c}

Front 82

What is the most common heat exchanger found in industrial applications?

Back 82

Shell and Tube type

Front 83

Do not clean out exchangers with (BLANK( when operating fluids are of a flammable or hazardous nature.

Back 83

Air

Front 84

A slight sludge or scale coating on the tubes greatly (BLANK) the heat transfer efficiency

Back 84

Decreases

Front 85

The medium that supplies the heat to the heat exchangers is specified when?

Back 85

First

Front 86

Tube to tube heat exchangers may be the best choice for (BLANK) situations because the single tube passage creates higher velocities.

Back 86

Low flow

Front 87

What is the suggested max distance for bands on a 13mm (1/2”) tracer line

Back 87

450mm (18”)

Front 88

How much of the plant steam is consumed by process tracing lines?

Back 88

small amounts

Front 89

In general he percent of steam locations in a hydrocarbon processing plant are?

Back 89

70%

Front 90

Which type of glycol has the best heat transfer capabilities?

Back 90

Ethylene

Front 91

Excess steam is vented to atmosphere on a flash steam system by?

Back 91

A backpressure valve

Front 92

When steam is exhausted to the atmosphere by a turbine it is considered to be a Condensing Plant

Back 92

False

Front 93

When hot condensate re-evaporate it is referred to as?

Back 93

Flash Steam

Front 94

What velocity does ASHREA recommend for proper separation of flash steam in a flash vessel?

Back 94

10 ft/ sec

Front 95

Which ASME code is referenced when a flash vessel 6 inches in diameter is used?

Back 95

B31.1

Front 96

What is a series flash steam recovery steam system called?

Back 96

A Cascade system

Front 97

What type of pressure does a backpressure valve control?

Back 97

Upstream pressure

Front 98

What is the most important dimension on a flash tank?

Back 98

Diameter

Front 99

When 2000 lb/hr of condensate from a source at 100 psig is flashed to 10 psig what is the weight of the LP steam available?

Back 99

212

Front 100

In general which piece of equipment produces usable exhaust steam ?

Back 100

Turbine

Front 101

What type of force is used to remove moisture from vapour in an exhaust head?

Back 101

Centrifugal

Front 102

What is another term used when referring to a backpressure valve?

Back 102

Surplussing valve

Front 103

Why is the size of the flash vessel important?

Back 103

It prevents carryover

Front 104

In a flash steam system water logging of equipment is caused when?

Back 104

Steam space pressure is less than flash vessel pressure