55

Front 1

The main part of the firetube boiler is ___________.

Back 1

The shell

Front 2

Shells and drums are made of steel plates. The thickness of these plates vary from _______ to _______.

Back 2

6 mm to 250 mm

Front 3

In the case of a firetube boiler, the heads are in a ______ shape rather than a _______ shape. They are called _________.

Back 3

Flat rather than dished

Tubesheets

Front 4

In the case of a watertube boiler, the heads are in a ______ shape rather than a _______ shape.

Back 4

Dished, flat

Front 5

Five basic welds used in boiler construction

Back 5

1. Butt joint

2. Corner joint

3. Tee joint

4. Lap joint

5. Edge joint

Front 6

Which welding joint is primarily used in boiler construction?

Back 6

Butt joint

Front 7

Two basic types of welds

Back 7

1. Groove weld (butt joint)

2. Fillet weld

Front 8

During the welding processes ________ can build up in the metal. These stresses can be removed through ______ ________.

Back 8

Stress

Heat treatment

Front 9

Two types of rivited joints

Back 9

1. Lap joints

2. Butt joints

Front 10

Three different ways of tube attachment in firetube boilers

Back 10

1. Expanded and beaded over

2. Expanded, beaded over and welded

3. Expanded, beaded over and grooved

Front 11

Supports in boilers are called?

Back 11

Stays

Front 12

Watertube boilers don't tend to need stays because they don't have_______.

Back 12

Flat surfaces

Front 13

Through stay supports are attached with _____ and ______.

Back 13

Nuts and washers

Front 14

The size of an elliptical manhole cover can't be less then _____ by _____.

Back 14

280 mm by 380 mm

Front 15

Circular manhole covers can't be less then _______.

Back 15

380 mm

Front 16

Handholes can't be less then _______ by ________.

Back 16

70 mm by 89 mm

Front 17

Three types of walls in water-cooled furnace walls?

Back 17

1. Welded fin tube

2. Tangent tube wall

3. Flat stud tube wall

Front 18

Tubes for high pressure service are usually

A. Resistance welded construction

B. Pierce and role construction

C. Lap welded construction

D. Expanded into the drum or tubesheet.

Back 18

B. Pierce and role construction

Front 19

Name two types of Boiler tubes

Back 19

1. Resistance-welded boiler tubes

2. Seamless boiler tubes

Front 20

With a bottom-supported boiler, the steam drum is usually:

1) Supported by an overhead girder arrangement

2) Supported by the water tubes

3) Placed between the centre line of the unit

4) A cross-drum configuration

5) Supported by piers

Back 20

2) Supported by the water tubes

Front 21

One or more steel plates rolled into cylindrical form and welded together with the ends closed by means of end plates or heads is called a:

1) Combustion chamber

2) Steam header

3) Packaged boiler

4) Steam or water drum

5) Steam space

Back 21

4) Steam or water drum

Front 22

The flat surfaces which require staying in a firetube boiler are the tube sheets, water legs, and:

1) Flue gas baffles

2) Uptakes

3) Crown sheets

4) Access doors

5) Furnace tubes

Back 22

3) Crown sheets

Front 23

Head-to-drum circumferential joints are usually:

1) Double welded butt joints

2) Single welded edge joints

3) Double welded tee joints

4) Fillet welded corner joints

5) Fillet welded lap joints

Back 23

1) Double welded butt joints

Front 24

Water walls in a boiler:

1) Are made of firetubes

2) Decrease overall boiler efficiency

3) Are part of a firetube boiler

4) Will increase the furnace temperature

5) Decrease overall boiler weight

Back 24

5) Decrease overall boiler weight

Front 25

In firetube boilers, through or _____ stays are often used to support the area of the tube sheets below the tubes.

1) Diagonal

2) Longitudinal

3) Radial

4) Watertube

5) Gusset

Back 25

2) Longitudinal

Front 26

Tubes for high pressure service are usually:

1) Of 2 metre maximum length

2) Roll and pierce construction

3) Lap welded construction

4) Resistance welded construction

5) Flared into the drum or tube sheet

Back 26

2) Roll and pierce construction

Front 27

The circumferential seam of a riveted boiler shell utilized the:

1) Double equal strap double riveted butt joint

2) Lap joint, single or double riveted

3) Double unequal strap treble riveted butt joint

4) Treble riveted butt joint

5) Always a single riveted lap joint

Back 27

2) Lap joint, single or double riveted

Front 28

Single-welded butt joints:

1) Are never used for boiler fabrication

2) Must have a double “V” groove

3) The filler metal is applied to both sides of the joint

4) The filler metal is applied from one side only

5) Are used on very thick boiler plates

Back 28

4) The filler metal is applied from one side only

Front 29

Tube stubs welded to drums and headers, which are used for connecting fittings and attachments, are also known as:

1) Fittings

2) Manifolds

3) Flanges

4) Nipples

5) Nozzles

Back 29

5) Nozzles

Front 30

In welding terminology, the first bead laid in a welding job is referred to as the:

1) Face

2) Reinforcement

3) Root

4) Bond

5) Toe

Back 30

3) Root

Front 31

The advantage of a water cooled furnace is:

1) Hotter furnace temperature

2) Decreased boiler efficiency

3) Less chance of a furnace explosion

4) Less brickwork required

5) Increased air/fuel turbulence

Back 31

4) Less brickwork required

Front 32

Another expression used to describe the expanding of tubes into a tube sheet is called:

1) Flaring

2) Thermo-elongation

3) Beading

4) Peening

5) Rolling

Back 32

5) Rolling

Front 33

A Morison furnace is:

1) Watertube boilers

2) Locomotive boilers

3) Found in electric boilers

4) Found in firetube boilers

5) A ring-reinforced type furnace

Back 33

4) Found in firetube boilers

Front 34

A boiler nozzle attachment:

1) Is used for steam cleaning the fireside

2) Can be found in the area of the burner

3) Is always installed vertically

4) Nearly always accommodates a valve or fitting

5) Allows a connection for the uptake

Back 34

4) Nearly always accommodates a valve or fitting

Front 35

A Morison furnace is:

1) A ring-reinforced type furnace

2) Watertube boilers

3) Found in electric boilers

4) Locomotive boilers

5) Found in firetube boilers

Back 35

5) Found in firetube boilers

Front 36

A tube expander is used to:

1) Expand and flare the tube

2) Break loose scale in the tube

3) Expand the entire tube

4) Bead the tube

5) Break loose scale outside the tube

Back 36

1) Expand and flare the tube

Front 37

The circumferential seam of a riveted boiler shell utilized the:

1) Double equal strap double riveted butt joint

2) Treble riveted butt joint

3) Always a single riveted lap joint

4) Lap joint, single or double riveted

5) Double unequal strap treble riveted butt joint

Back 37

4) Lap joint, single or double riveted

Front 38

In firetube boilers, through or _____ stays are often used to support the area of the tube sheets below the tubes.

1) Radial

2) Longitudinal

3) Watertube

4) Diagonal

5) Gusset

Back 38

2) Longitudinal

Front 39

In firetube boilers, _____ stays are usually used to support the flat surfaces above the tubes.

1) Diagonal

2) Gusset

3) Hollow

4) Through

5) Longitudinal

Back 39

1) Diagonal

Front 40

Radiographic pictures of welds are taken with the use of:

1) Gamma rays

2) X-rays

3) Microwaves

4) Strontium 90

5) Ultra-violet rays

Back 40

2) X-rays