Boiler Test 2

Front 1

Tha balanced equation for the complete combustion of hydrogen is:

Back 1

2H2 + O2 --> 2H2O + heat

Front 2

Which of the following is not fuel:

Sulphur

Carbon

Carbon monoxide

Carbon dioxide

Back 2

Carbon dioxide

Front 3

What is/are the conditions that will produce NOx?

Back 3

The furnace temperature is over 1500 degree c

Front 4

Light furnace, grade 1 or 2, fuel oil:

Back 4

Commonly used in both domestic and industrial applications

Front 5

The purpose of the turbulence requirement in combustion is to

Back 5

To facilitate better mixing of fuel and air

Front 6

When using mechanical fuel atomization

Back 6

A High pump pressure is required

Front 7

Gas burners can be divided into two general classes

Back 7

Premix and aftermix

Front 8

With an aftermix burner

Back 8

The fuel and air meet and mix at the point of discharge from the burner and the fuel and air mixture ignites immediately, filling the furnace tube with fire

Front 9

What does a rotary cup oil burner use to atomize the oil

Back 9

Centrifugal force

Front 10

The reducing of oil into very small particles is termed

Back 10

Atomization

Front 11

In an oil burner with two fixed capacity nozzles

Back 11

The secondary nozzles does not need an ignitir as it is ignited by the primary nozzles

Front 12

An interrupted pilot

Back 12

Ignites and is proven at the beginning of the main burner run sequence, after the main burner is proven for about 10 seconds the pilot is extinguished

Front 13

A ring burner

Back 13

Has gas supplied to ring manifold that has numerous gas outlet holes and has an air diffuser cone gives the air a swirling motion before enters the furnace in order to promote intensive mixing of gas and air

Front 14

The most efficient operation of a fan demands that

Back 14

This speed be only sufficient enough to supply the required amount of air

Front 15

Draft is

Back 15

The difference in pressure between the furnace and combustion air supply

Front 16

When the least amount of energy is desired to drive a fan with variable output control the type of control used would most likely be

Back 16

Variable speed driver or variable speed coupling

Front 17

In a boiler gas train

Back 17

High gas pressure cut out is to prevent too rich concentration of fuel in the furnace

Front 18

Balanced draft

Back 18

Shall use a forced draft and an induced draft fan

Front 19

Brick and mortar stack requires

Back 19

Fire brick or clay lining

Front 20

Comparing to an induced draft fan a forced draft fan

Back 20

Is smaller

Front 21

Which of the following are not necessary to ensure complete combustion of the fuel:

A) The temperature of the furnace must be high enough

B) safety valve must be set properly

C) enough time must be allowed for the fuel to burn

D) the air and fuel must be thoroughly mixed together

Back 21

B) safety valve must be set properly

Front 22

The refining process for fuel oils involves separating the crude oil into end products which have distinguishing characteristics such as specific gravity, viscosity, and

Back 22

Boiling point

Front 23

When a gas fired burner is burning fuel properly

Back 23

It will have a blue flame with short yellow tips

Front 24

And a steam atomizing oil burner the _____ travels through the central portion of the burner

Back 24

Oil

Front 25

The main function of a gas burner is to

Back 25

Provide intimate mixing of gas with combustion air

Front 26

Gas burners

Back 26

Mix the fuel and air (oxygen) and ignite the fuel and maintain stable Ignition

Front 27

The air atomizing oil burner is commonly used on

Back 27

Larger package boilers

Front 28

If during a flue gas analysis the excess air to a boiler furnace is increased

Back 28

Carbon dioxide percentage should decrease

Front 29

A modulating pressure atomizer has its return oil flow regulated by

Back 29

A control valve in the return line

Front 30

Boiler stack temperature can rise if

Back 30

The fire side of the boiler becomes fouled

Front 31

In an oil burner with 3 fixed capacity nozzles the intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle

Back 31

To allow better boiler warm UPS

Front 32

Before atomization can occur heavy oils are heated to approximately

Back 32

90 to 95ﾟ C

Front 33

Gaseous fuels in common use are

Back 33

Natural gas, liquefied petroleum gas, and biogas

Front 34

A uTube is connected to the discharge of a forced draft fan the

Back 34

Open end will have a higher liquid level than the connection to the fan

Front 35

When the flue gas is hotter the flow of combustion air into the furnace increases because

Back 35

Greater density differential between the flue gas and outside air

Front 36

Which statement about furnace draft is true

Back 36

Control of the amount of air going into the furnace can be achieved by a combination of varying the speed of the driver and/or the damper positions

Front 37

A way of increasing natural draft is to

Back 37

Increase the stack height

Front 38

The inclined tube manometer operates

Back 38

On the same principle as A u tube manometer

Front 39

And efforst draft system the furnace pressure is

Back 39

Above atmosphere pressure

Front 40

What is/are the advantages of mechanical draft

Back 40

It is independent of the chimney temperature and has better draft regulation and may be able to utilise a shorter stack

Front 41

Which of the following is not the result of insufficient air for combustion

carbon in the flue gases

or high temperature in the flue gases

or High CO in flu gases

or low oxygen reading in flue gases

Back 41

High temperature in flue gases

Front 42

A major disadvantage of oil over cool is

Back 42

Oil is more expensive and less abundant

Front 43

What must all oil fired boilers require

Back 43

A fuel pump

Front 44

An air atomizing compressure is usually

Back 44

A positive displacement type

Front 45

Hog fuel and biomass fuels

Back 45

Can be burned on their own or in conjunction with coal or oil or gas firing systems

Front 46

CSA B139 deals with

Back 46

Installation code for oil burning equipment

Front 47

In an oil burner with 2 fixed capacity nozzles

Back 47

The secondary nozzle does not need an igniter as it is ignited by the primary nozzle

Front 48

An interrupted pilot

Back 48

Ignites and is proven at the beginning of the main burner run sequence after the main burner is proven for

Front 49

Balanced draft

Back 49

Shall use a forced draft and an induced draft fan

Front 50

When the flue gas is hotter the flow of combustion air into the furnace increases because

Back 50

Greater density differential between the flue gas and outside air

Front 51

An induced draft fan

Back 51

Operates at a much higher temperature than an FD fan

Front 52

Methane is a component of natural gas and constitutes percent volume of

Back 52

Approximately 90%

Front 53

Which is the three ts of combustion

Back 53

Turbulence, temperature, time

Front 54

What type of fuel requires the least amount of refractory to the line the furnce

Back 54

Gas

Front 55

Tertiary air

Back 55

Is provided if primary and secondary air do not provide the required combustion air

Front 56

Natural draft is produced in a boiler furnace when

Back 56

Gases in the stack have less mass than an equal column of outside colder air

Front 57

The simplest way of measuring draft is with

Back 57

An inclined manometer

Front 58

When a gas fired burner is burning fuel properly

Back 58

You have a blue flame with short yellow tips

Front 59

Methane is a component of natural gas and constituents a percent volume of

Back 59

Approximately 90%

Front 60

The balanced equation for the incomplete combustion of carbon is

Back 60

2c + o2 --> 2co + heat

Front 61

Which of the following is not the result of insufficient air for combustion

high temperature in flue gas

carbon in the flue gas

low oxygen reading in the flue gas

high co in flue gas

Back 61

High temperatures in flue gas

Front 62

Which type of fuel requires the least amount of refractory to line the furnace

Back 62

Gas

Front 63

A light fuel oil system which utilises air atomizing burners Ranges in pressures of

Back 63

150 to 250 KPA

Front 64

An air atomizing compressor is usually

Back 64

A positive displacement type

Front 65

What must all oil fired boilers require

Back 65

A fuel pump

Front 66

Leak testing of natural gas piping should be

Back 66

Done With a leak detection solution And done on a regular basis

Front 67

Hogs fuels and biomass fuels

Back 67

Can be burned on their own or in conjunction with coal oil or gas firing systems

Front 68

The inclined u tube manometer

Back 68

Is more accurate than a uTube manometer

Front 69

And a forced draft system the furnace pressure is

Back 69

Above the atmosphere pressure

Front 70

Tertiary air

Back 70

Is provided if primary and secondary air do not provide the required combustion air

Front 71

To which of the following oil burners is the oil supplied under high pressure

Back 71

Mechanical atomizing burner

Front 72

Secondary air

Back 72

Is supplied in the combustion zone

Front 73

When an air heater is used in a boiler

Back 73

It increases the efficiency of the boiler

Front 74

The simplest way of measuring draft is with

Back 74

An inclined manometer

Front 75

A condensate receiver low level cutoff switch will

Back 75

Stop the feed pump thereby preventing damage to it

Front 76

The exhaust steam of a condensing turbine is sent to

Back 76

The condenser

Front 77

In relation to boiler drum levels the term swell refers to which the following

Back 77

Decrease in drum pressure causes the water level to increase

Front 78

The low water fuel cut off uses a _________ to identify where the boiler water level is at

Back 78

A float

Front 79

The ______ is not part of the feedwater system component found in heating plants with steam heating boilers

Back 79

Economizer

Front 80

Floats when used as primary sensing elements in boiler level control loops respond to

Back 80

Changes in water level

Front 81

Which is not a function why the condensate receiver is vented

Back 81

The contents a tank is not a pressure vessel and does not require a vent

Front 82

When boilers are under continuous supervision what code would you use to build a boiler with only one low water fuel cut off device

Back 82

CSAB 51

Front 83

The water in the deaetator is supplied from which two sources

Back 83

Condensate and make up water

Front 84

With single element feedwater controls the level transmitter output is

Back 84

Proportional to drum level

Front 85

The feedwater pump runs continuously if the feed water valves of all the boilers are closed the feedwater

Back 85

Recirculates back to the bottom of the dearetor

Front 86

The type of blowdown system used on a boiler is usually a function of

Back 86

The type of exter nal water treatment used

Front 87

According to the CSAB 51 code a blow off tank is necessary to

Back 87

Prevent high temperature in pressure in the sewer

Front 88

Which part of a blow off valve can be replaced or repaired

Back 88

The valves packing and the discs and seat

Front 89

The purpose of continuous blow down is to remove

Back 89

Matter in boiler water solution

Front 90

when 2 seatless valves are used for interment blowdown the operation sequence is

Back 90

Open the downstream valve 1st and close it last

Front 91

The quick opening blow off valves should be placed

Back 91

Closest to the boiler

Front 92

A blowdown tank will

Back 92

Lower the temperature and pressure of the incoming boiler water

Front 93

Which of the following is not a component of condensate return system

Back 93

The condensate makeup tank

Front 94

Which of the following is true about a well balanced steam heating system

Back 94

The amount of condensate returning from the heating system = the amount of steam leaving the system

Front 95

The ________ is not part of the feedwater system components found in heating plants with steam heating boilers

Back 95

Economizer

Front 96

To protect a steam heating boiler from operating under an unsafe water level the LWCO

Back 96

Shut off the burner system

Front 97

2 and 3 element feedwater control systems are only used

Back 97

In large power boilers

Front 98

The low water fuel cut off is designed to

Back 98

Prevent boiler damage

Front 99

The function of a low water fuel cut off is to

Back 99

Prevent the boiler from operating when an unsafe water level is reached in the boiler

Front 100

The continuous boiler water blowdown is used

Back 100

In addition to the main blowdown

Front 101

A boiler blowdown system is equipped with slow and fast opening valves the quick opening valve is placed

Back 101

Closest to the boiler and open 1st

Front 102

Is all solids are not removed from boiler water the result may be

Back 102

Foaming and carry over

Front 103

The quick opening blow off valve should be placed

Back 103

Nearest to the boiler

Front 104

For blower system in a power boiler operating procedure can be found in _______the design of piping in _____

Back 104

ASME 7 and ASME 31.1

Front 105

Which of the following is allowed in blowoff piping systems operated about 690 kps

Back 105

Schedule 80 steel class 2000

Front 106

The blowdown system has 2 valves they should be opened and closed in the correct sequence to

Back 106

Protect the valve closest to the boiler

Front 107

Dearators are classified as pressure vessels and are divided into which 2 distinct sections

Back 107

Heater and storage sections

Front 108

The water in the Dearator is supplied from with 2 sources

Back 108

Condensate and make up water

Front 109

When boilers are under continuous supervision what code would you use to build a boiler with only one low water fuel cutoff device

Back 109

CSAB 51

Front 110

In relation to boiler drum level the term swell refers to which the following

Back 110

Decrease in drum pressure causes the water level to increase

Front 111

To protect a steam heating boiler from operating under an unsafe water level the LWCO

Back 111

Shut off the burner system

Front 112

Which of the following is not a function of a steam dearator

Back 112

To allow for separation of dissolved solids from the feedwater

Front 113

2 and 3 element feedwater control systems are only used

Back 113

In large power boilers

Front 114

The low water fuel cut off is designed to

Back 114

Prevent boiler damage

Front 115

Floats when used as primary sensing elements in boiler level control loops respond to

Back 115

Changes in water level

Front 116

A condensate receiver low level cut off switch will

Back 116

Stop the feed pump thereby preventing damage to it

Front 117

In relation to boiler drum level the term swell refers to which of the following

Back 117

Decrease in drum pressure causes the water level to increase

Front 118

A boiler blowdown system is equipped with slow and fast opening valves the quick opening valve is placed

Back 118

Closest to the boiler and open 1st

Front 119

Boiler water having the greatest concentration of suspended solids is found

Back 119

In the bottom of the mud drum

Front 120

Continuous blow down should be operated

Back 120

When TDs is higher than recommended

Front 121

The type of blowdown system used on a boiler is usually a function of

Back 121

The type of external water treatment used

Front 122

Which statement about blowoff tank is true

Back 122

Corrosion is common at the waterline

Front 123

When two seatless valves are used for intermittent blow down the operation sequence is

Back 123

Open the downstream valve 1st and close it last

Front 124

Water fuel cut off uses a ______ to identify where the boiler water level is at

Back 124

Float

Front 125

2 element feedwater control system will respond to

Back 125

The drum level and the steam flow

Front 126

In nearly all low pressure steam heating systems the feedwater

Back 126

Is usually condensate

Front 127

Raw water is defined as

Back 127

Untreated source water

Front 128

The feedwater pump runs continuously if the feedwater valves of all the boilers or closed the feedwater

Back 128

Recirculates back to the bottom of the dearator

Front 129

With single element feedwater control the level transmitter output is

Back 129

Proportional to the drum level

Front 130

Where are the dissolved gases removed from the dearator

Back 130

A vent at the top of the heater section

Front 131

Which of the following is true about a well balanced steam heating system

Back 131

The amount of condensate returning from the heating system = the matter of steam leaving

Front 132

Check valves are used to

Back 132

Prevent backflow

Front 133

Which is not a function why the constancy receiver is vented

Back 133

Condensate tank is a pressure vessel and requires a vent

Front 134

Which of the following is allowed in blowoff piping systems operated at about 690 kpa

Back 134

Schedule 80 steel class 2000

Front 135

Where water having the highest total dissolved solids content is found

Back 135

Just below the waterline of the steam drum

Front 136

The blowdown system has 2000 they should be opened enclosed in the correct sequence to

Back 136

Protect the valve closest to the boiler

Front 137

The purpose of continuous blowdown is to

Back 137

Matter in boiler water solution

Front 138

According to ASME BPVC1, PG - 72.1 pressure relief valve shall be designed to operate within a minimum blowdown of _____ percent of the set pressure

Back 138

2

Front 139

One of the possible causes for safety relief valves to weep is

Back 139

That it is designed for the wrong pressure range

Front 140

A blowdown ring on a safety valve is used to

Back 140

Adjust the blowdown differential

Front 141

With reference to ASME BPVC IV, HG 401.1 the manufacturer for all safety valves and safety relief valves shall provide

Back 141

A body drain below seat level

Front 142

According to ASME PTC - 25 the description for a pressure relief valve characterised by gradual opening that is generally proportion to the increase in pressure and it is normally used for incompressible fluids is a

Back 142

Relief valve

Front 143

Most of the information governing safety valve design, material selection, capacity testing, adjustments and ceiling are covered in

Back 143

ASME BPVC I

Front 144

T and P relief valve provides protection for

Back 144

Both overpressure and high water temperatures

Front 145

If the pressure relief valve continues to discharge after the try lever test

Back 145

Operate the Tri lever 2 or 3 times to clear the valve disc

Front 146

Fuel should be shut off immediately if it fails to ignite

Back 146

To prevent furnace explosions

Front 147

Flame rods

Back 147

Should shut off the fuel within 4 seconds of flame failure

Front 148

The CSA B149.1 Natural gas and propane installation code limits the _______ for buildings of various occupancies

Back 148

Maximum fuel pressure

Front 149

When a flame failure occurs the scanner cannot sent a flame so its resistance ______ causing the flame relay to ______

Back 149

Increases, open

Front 150

A thermo couple

Back 150

Must be inserted into the flame to work effectively

Front 151

Fuel gas piping must be sized properly to ensure

Back 151

The required supply delivery is maintained

Front 152

BMS programming controllers preform all the functions of primary controls also with other features including

Back 152

Purge proving Circuitry

Front 153

Burner safety interlocks wired to primary control such as fuel safety shut off valves may include

Back 153

High and low gas pressure cut off

Front 154

Toward the end of the boiler furnace prepurge the timer

Back 154

Energises and activate the igniter

Front 155

According to CSAB 1 49.3 the primary controller limits the pilot trial for Ignition period to:

Back 155

Maximum 10 seconds

Front 156

BMS programming controllers are also known as

Back 156

Combustion programmers

Front 157

One of the primary purposes of burner management systems is to

Back 157

Protect against unsafe operating conditions

Front 158

The purpose of the _______ on top of the spindle above the Spring of a PRV is to prevent the Spring tension from accidental adjustment

Back 158

Jam nut/lock nut

Front 159

When of the possible causes for safety relief vows to weep on a hot water heating system is

Back 159

A water logged hot water heating system

Front 160

With reference to ASME BPVC I, PG-71.2 pressure relief valve shall be connected to a stand in at a/an ______ position

Back 160

Upright

Front 161

With reference to ASME BPVC IV HG 700 Safety valves must be located

Back 161

In the highest practical part of the boiler proper

Front 162

Low pressure steam heating boilers are designed to operate at no higher than

Back 162

100 KPA

Front 163

Fuel pressure regulators are used to maintain proper fuel pressure at

Back 163

Each of the main and pilot burners

Front 164

A flame failure device

Back 164

Will shut off the fuel to the burner

Front 165

High limit temperature Controls

Back 165

Shut off the fuel if the water temperature is too high

Front 166

To detect the presence of aflame aflame rod uses the principle that a flame

Back 166

Is capable of conducting electricity

Front 167

When a fuel pressure regulator malfunction and produces a low fuel pressure this condition could lead to

Back 167

Flame instability

Front 168

Ratifying photo cell is also known as

Back 168

Cad cell

Front 169

Burner safety interlocks wire to primary control such as fuel safety shut off valves may include

Back 169

High and low pressure gas cut off

Front 170

In an automatically fired boiler the pilot flame is adequate but the main burner fails to ignite, the programmer should

Back 170

Proceed to post purge and lockout while sounding an alarm

Front 171

CSA B149.1 stipulated that the required ventilating air openings for combustion air must at least

Back 171

10%

Front 172

Towards the end of the boiler furnace pre-purge, the timer

Back 172

Energize and activate the ignitor

Front 173

BMS programming controls perform all the functions of primary controls also with other features including

Back 173

Purge proving circuitry

Front 174

The required pre purge airflow rate prior to Ignition for a burner equipped with a mechanical drive for combustion air is

Back 174

Not less than 60% required at maximum input

Front 175

Towards the end of the boiler furnace prepurge the timer

Back 175

Energize and activate the ignitor

Front 176

I hartford loop is used on heating boilers to prevent

Back 176

Boiler water empties into condensate line

Front 177

The exhaust steam of a condensing turbine is sent to

Back 177

The condenser

Front 178

Where are the dissolved gases removed from the dearator

Back 178

A vent at the top of the heater section

Front 179

Raw water is defined as

Back 179

Untreated source water

Front 180

What are the 3 t's of combustion

Back 180

Turbulence temperature and time

Front 181

Natural draft is produced in a boiler Furnace when

Back 181

Gases in the stack have less mass than an equal column of outside colder air