3Rd Block Exam

Front 1

Section 1

Back 1

HYDRONIC HEATING 2

Front 2

1. What type of hydronic piping system is

usually installed in a commercial and

industrial application.

Back 2

Two-Pipe

Front 3

2. Which type of hydronic piping system

provides the most balance flow of even

heating?

Back 3

Reverse return

Front 4

3. Which hydronic piping system is referred to as a (first-feed first-return) system

Back 4

Direct return

Front 5

4.

Back 5

Two-pipe closed forced flow reverse return sysyem

Front 6

5. When are monoflow tees required for both supply and return lines to heat transfer units

Back 6

Unit supplying and returning down-feed units

Front 7

6. What will occur when cast iron and fin-tube

baseboard or cast iron and convector

radiators are connected to the same heating circuit

Back 7

Heat will be uneven

Front 8

7. What is prevented by the installation of an

eccentric reducer with the flat side up

Back 8

Air pockets

Front 9

8. When zoning with circulators, what is used to control each zone

Back 9

A low-voltage thermostat and relay

Front 10

9. In which circumstance does a heating transfer unit NOT require individual air venting

Back 10

When it is down-fed

Front 11

10. How should the main piping that runs in a hydronic heating system be installed

Back 11

Almost level with a slight upward slope in the direction of flow of 1/2 inch 10ft.

Front 12

11. In a multi-zone commercial force-flow hydronic system, the circulation pumps are drafting from the main supply header. Where is the best location for the compression tank connection

Back 12

Up stream of the circulator

Front 13

12. What is the industry standard used for

calculating the GPM flow rate of a circulator in a hydronic heating system

Back 13

10,000 Btuh

Front 14

13. At which location should the secondary circuit circulating pump be placed in the system

Back 14

2

Front 15

14. Which heat transfer units must NOT be installed in the same heating circuit with convector heat transfer units

Back 15

Free-standing cast iron radiators

Front 16

15. Electric zone valves function in how many basic ways

Back 16

Two

Front 17

16. When changing pipe size what is the proper type of fitting to use in a horizontal hot water heating Main

Back 17

Eccentric reducing coupling

Front 18

17. In conformance with ASME codes for low-

pressure heating systems,

what is the maximum allowable working pressure of a hot water

heating system

Back 18

160psi

Front 19

18. When troubleshooting a heating problem, the boiler is on low-water. What is the correct

action to take

Back 19

Shut-down the boiler

Front 20

19. What symbol

represents an elbow looking down

Back 20

11

Front 21

20. What symbol

represents an

expansion joint

Back 21

2

Front 22

21. Which symbol

represents a strainer

Back 22

3

Front 23

22. What is the maximum flow velocity for most hot water heating systems

Back 23

4ft. per second

Front 24

Section 2

Back 24

Pipe Bending

Front 25

23. What is the name for the straight piece of pipe before and after the bend

Back 25

Tangent

Front 26

24. What is the term used for the back of the bend

Back 26

Outer curvature

Front 27

25. What is the term used for the throat of the bend

Back 27

Inner curature

Front 28

26. What happens to the material in the pipe at the back of the 90° elbow when the bend is finished

Back 28

It gets thinner

Front 29

27. How many operations are needed for making a regular bend by machine

Back 29

1

Front 30

28. What is used to fill the pipe bend

Back 30

Dry sand

Front 31

29. What does gain represent in pipe bending

Back 31

Difference between square corner

measurement to the round

Front 32

30. When one bend must run into another, what is done with the second bend

Back 32

Hot bend the second bend

Front 33

31. In what situation is wrinkle pipe prohibited

Back 33

Edible liquid piping

Front 34

32. What is the procedure for stretch bending

Back 34

Apply force to both ends of a piece of pipe, stretching it around a suitable former

Front 35

33. What is used to mark out wrinkle pipe for heating

Back 35

Pop marks

Front 36

34. What is an important factor in wrinkle bending

Back 36

Proper heating before bending

Front 37

35. What is the temperature of yellow heat over a heating area

Back 37

2200°F

Front 38

36. After hot bending, What temperature is the metal reheated in order to relieve stress

Back 38

1100°F

Front 39

37. Compression type tube benders usually

limited to what size of tube

Back 39

3/4" (19mm)

Front 40

38. When bending lap on butt weld pipe, why is it important to keep the seal on top

Back 40

To see if the seam opens during bending

Front 41

39. When bending a 90° bend with a hand lever bender, where is the centre mark of the pipe set on the bender

Back 41

At 90° mark

Front 42

40. What is the colour code for type K tube

Back 42

Green

Front 43

41. Where must the seam be located when

preparing lap or butt weld pipe for bending

Back 43

On the top

Front 44

Section 3

Back 44

Low pressure steam

Front 45

42. What is required to control the telescopic movement of an expansion compensator to its design capacity

Back 45

Restriction plates

Front 46

43. What device is installed in conjunction with steam control valves and traps

to prevent component damage

Back 46

Strainer

Front 47

44. What term is used for the horizontal

piping that runs from a heat transfer unit to a vertical steam rise

Back 47

Runout

Front 48

45. What causes a reduction in pressure when steam flows through piping and components

Back 48

Friction resistance

Front 49

46. Which valve is installed in the steam

supply line between each boiler and the

header of a multiple boiler system

Back 49

Non-return

Front 50

47. What fitting should be used to reduce the size of a horizontal steam pipeline

Back 50

Eccentric reducing

Front 51

48. What is the most common type of trap used in two-pipe steam heating system

Back 51

Float and thermostatic

Front 52

49. What type of valve is readily adaptable to most types of heat transfer unit radiator

convector installation

Back 52

Globe valve

Front 53

50. What factor determines the required size of a steam trap

Back 53

Quantity of condensate per hour

Front 54

51. In low-pressure steam system, where is a dirt pocket required

Back 54

Upstream of the trap inlet

Front 55

52. What type of steam trap is commonly used to drip up feed steam riser

Back 55

Float and thermostatic

Front 56

53. What type of trap is best suited for installation in locations where freezing conditions may exist

Back 56

Thermodynamic

Front 57

54. What is this steam specialty device

Back 57

Inverted bucket trap

Front 58

55. What is this steam specialty device

Back 58

Thermostatic trap

Front 59

56. Where is this steam specialty device located

Back 59

Upstream of a steam trap

Front 60

57.Which unit heater is correctly piped in low-pressure steam system

Back 60

2

Front 61

58. Which type of steam trap is used for

returning the condensate to the boiler

Back 61

Float

Front 62

59. Which unit heaters are correctly piped in low-pressure steam system

Back 62

4

Front 63

60. What is the component located a K

Back 63

Pneumatic valve

Front 64

61. What is the minimum pipe size to the water column on a boiler

Back 64

NPS 1"

Front 65

62. What device is installed in a steam

heating system to receive water discharged at regular intervals from the boiler for maintenance purposes

Back 65

Blowdown tank

Front 66

63. How many safety relief valves are

required for a boiler with more than 500 sq. ft. EDR

Back 66

A minimum of two

Front 67

64. What is the function of the pigtail installed in a steam system

Back 67

To maintain a water seal between the boiler and the Bourdon tube

Front 68

65. What combination of valves in order of

installation in the direction of flow, is installed on the blow line's from a steam boiler

Back 68

Quick opening valve, then a Y

pattern globe valve

Front 69

66. Where the discharge from a boiler safety valve terminates through a roof, what is

the minimum distance above the roof to the

termination point

Back 69

2.1m (7 ft.)

Front 70

67. What is installed at the base of the vertical discharge piping from a safety relief valve

Back 70

Drip pan elbow

Front 71

68. For which device is a correctly installed pigtail siphon vital

Back 71

Pressuretrol

Front 72

69. When assembling a Hartford loop

connection to a steam boiler, there is a direct piping loop between the steam side and the return side of the boiler. What is the other

essential feature of this assembly

Back 72

A close nipple and tee connection of the wet

return to the loop piping 50mm (2'') below the boiler's normal operating level. (NOWL)

Front 73

70. What is the optimal slope for horizontal

piping system

Back 73

1"/ 20' (25mm / 6m)

Front 74

Section 4

Back 74

PIPE TEMPLATE DEVELOPMENT

Front 75

71. What inexpensive accurate device is used to lay markings around pipe

Back 75

Wrap-a-around

Front 76

72. What tool or combination of tools is used to orient the travel of an offset rising at an angle of 45° in vertical pipeline

Back 76

Pipe fitters torpedo level

Front 77

73. What device is designed to lay out angels of both 90° and 45°

Back 77

Combination square

Front 78

74. What is the sum of the angels of any triangle

Back 78

180°

Front 79

75. What is the term for the centre to centre distance between the two bends in an in line piping offset

Back 79

Travel

Front 80

76. What device is used to measure and compare the thickness of materials

Back 80

Micrometer

Front 81

77. What material is commonly used to mark the cut and layout lines on steel pipe or plate

Back 81

Soapstone

Front 82

78. What device is designed for measuring and laying out angles

Back 82

Protrator

Front 83

79. What device may be used to measure both inside and outside dimension of an object

Back 83

Vernier caliper

Front 84

80. What layout tool is used to layout long lines on a flat surface

Back 84

Chalk line

Front 85

81. When specifying angle iron, which number indicates the thickness of the metal

Back 85

Third

Front 86

82. What measurement is being taken by the steel square

Back 86

Outside radius

Front 87

83. What operation is being performed

Back 87

Laying out quarter lines

Front 88

84. What are the three main uses of the steel square

Back 88

Take linear measurement, check squareness,

compute diagonals

Front 89

85. What tool or device is best for laying straight lines two to eight feet in length on flat surfaces

Back 89

Straight edge

Front 90

86.Which of the following factors is not used when fabricating a reducer from straight pipe

Back 90

Inside pipe circumferences

Front 91

87. What is the

template shown

Back 91

Lateral to an equal size header

Front 92

88. What is the template shown

Back 92

Lateral to a larger header

Front 93

89.What is the template shown

Back 93

True wye

Front 94

90. When using an oxy fuel torch to make a mitre cut, how should the tip of the torch be oriented

Back 94

Perpendicular to the pipe surface

Front 95

91. What is the welding level angle for the arms of a concentric reducer

Back 95

45°

Front 96

92. Which of the following factors is not used when fabricating from straight pipe

Back 96

Inside pipe circumference

Front 97

93. A branch tee is being laid out for a header of the same pipe size. Which is usually true for the intersection points on the riser branch

Back 97

Rounded out above the header centreline

2 x the W.T.

Front 98

94. What is the term used for template

development for pipe layout

Back 98

Parallel line development

Front 99

95. What is the the dimension

Back 99

Twice the wall thickness

Front 100

96. What is the angle of 1 where the riser and header are of equal size pipe

Back 100

90°

Front 101

97. When may an orange peel blank be used

Back 101

Under any pressure

Front 102

98. When laying out the arms of an orange peel blank, what information is required

Back 102

Size of the pipe

Front 103

99. When fabricating an orange peel blank,

Back 103

Reference lines

Front 104

100. When fabricating an eccentric reducer what is the alignment of the centre lines of the major pipe and the minor pipe

Back 104

The centre lines do not line up

Front 105

101. What device can be used to check the angle of the branch of a lateral

Back 105

Fitter protractor

Front 106

102. What device is used to mark a mitre cut around a pipe

Back 106

Centreing head

Front 107

Section 6

Back 107

Gas piping 1

Front 108

103. Which of the following is NOT an acceptable manual shut off valve for gas

Back 108

Gate valve

Front 109

104. What is the maximum operating pressure of Type-11 flexible gas hose

Back 109

350 PSI

Front 110

105. Which produces carbon monoxide during incomplete combustion

Back 110

A hydrocarbon

Front 111

106. What is the maximum size branch line off a 5 inch main, when a job fabricated fitting is used

Back 111

2 1/2 inch

Front 112

107. What is the chemical formula for propain

Back 112

C3H8

Front 113

108. What schedule indicates extra heavy steel pipe

Back 113

Sch. 80

Front 114

109. How are measurements indicated on piping drawings

Back 114

Center to centre

Front 115

110. How is hydrochloric acid formed

Back 115

When hydrogen chloride gas combines with water

Front 116

111.What pipe size is required at F on test

NG-100

Back 116

1 1/4 INCH

Front 117

112. What is the maximum length of a connector used to connect a vented appliance

Back 117

0.6 m

Front 118

113. What is the minimum size of pipe G on test NG43-75

Back 118

1 1/2 INCHES

Front 119

114. How much excess air is required to burn 1000 cubic feet of natural gas per hour

Back 119

5,000 cu. ft.

Front 120

115. How many Btu's can 95 ft. of 1 1/4 sch. 40 steel (natural gas) pipe supply at a gas pressure of 10 inches on water column

Back 120

528,000

Front 121

116. Which is true of pressure testing concealed piping

Back 121

It must be tested prior to being concealed

Front 122

117. What is the approximate maximum flame temperature, in Fahrenheit, of natural gas

Back 122

3600°

Front 123

118. What are the primary products of propane combustion

Back 123

H2O, CO2 and heat

Front 124

119. As the temperature of liquid propane increases, what happens to the vapour

pressure in the tank

Back 124

It increases

Front 125

120. How many kW can 48m. of 19mm tubing supply with a NG pressure of 1.74 kPa

Back 125

11

Front 126

121. What is the ignition temperature in

degrees F° for propane

Back 126

920°

Front 127

122. What is the volume of excess air required for a propane gas appliance with a Btu/h

input of 75,000

Back 127

375 ft3

Front 128

123. What is the size of the pipe J

Back 128

22mm

Front 129

124. What is the size of pipe F

Back 129

16MM

Front 130

125. What is the minimum diameter of the drip pocket (4), where the size of the drop pipe is NPS 2 1/2 inches

Back 130

NPS 2 inches