Book 1: 2-06 - Basic Fittings for Hot Water Boilers

Question 1

The wax filled sensor probe in a combination pressure-temperature relief valve will expand and open the valve by means of a piston at approximately:

Select one:

A. 110°C (230°F)
B. 99°C (210°F)
C. 134°C (273°F)
D. 50°C (122°F)
E. 60°C (140°F)

Answer 1

B. 99°C (210°F)

Question 2

The relief valve on hot water boilers with a working pressure of up to 414 kpa (60 psi) should open with in a variation of _____ below or above the setpoint.

Select one:

A. 10 kPa (1.5 psi)
B. 30 kPa (4.5 psi)
C. 20 kPa (3 psi)
D. 5%
E. 14%

Answer 2

C. 20 kPa (3 psi)

Question 3

The discharging piping from the relief valve should be piped to a safe point for disposal and can be:

Select one:

A. Connected to any vent
B. Connected to any drain
C. Terminated above a floor drain
D. Connected to a condensate tank
E. Connected to the Deaerator

Answer 3

C. Terminated above a floor drain

Question 4

The minimum size of the hot water heating boiler bottom blow off or drain connection shall be:

Select one:

A. 19 mm (3/4 in.)
B. 15 mm (1/2 in.)
C. 25 mm (1 in.)
D. 75 mm (3 in.)
E. 6 mm (1/4 in.)

Answer 4

A. 19 mm (3/4 in.)

Question 5

The temperature of the water in a hot water heating system with an open expansion tank is normally limited to:

Select one:

A. 99°C (210°F)
B. 80°C (175°F)
C. 121°C (250°F)
D. 60°C (140°F)
E. 150°C (302°F)

Answer 5

B. 80°C (175°F)

Question 6

The automatic fill valve is a _____ valve which keeps the system filled with water and maintains a set pressure in the system.

Select one:

A. Temperature control valve
B. Pressure reducing valve
C. Back pressure valve
D. Air vent valve
E. Pressure control valve

Answer 6

B. Pressure reducing valve

Question 7

On a hot water boiler, the highest value on the graduated scale of the pressure gauge shall not be less than_____ times the pressure at which the pressure relief valve is set.

Select one:

A. 2
B. 1.5
C. 3.5
D. 2.5
E. 3

Answer 7

B. 1.5

Question 8

The purpose of the expansion tank in a hot water heating system is to:

Select one:

A. Provide storage space for excess water
B. Add make-up water to the system
C. Provide storage space for excess steam
D. Provide space to store the returning condensate
E. Separate the water and steam produced

Answer 8

A. Provide storage space for excess water

Question 9

The highest pressure to which the scale on the pressure gauge of a hot water boiler may be graduated is _____ times the pressure at which the pressure relief valve is set.

Select one:

A. 3
B. 3.5
C. 2.5
D. 1.5
E. 2

Answer 9

B. 3.5

Question 10

The pressure relief valve is typically installed on the boiler or reasonably close to the boiler outlet with:

Select one:

A. A plug valve for isolation
B. A gate valve for isolation
C. A ball valve for isolation
D. A globe valve for isolation
E. No valve between

Answer 10

E. No valve between

Question 11

The operating handle of the valve to the pressure gauge on a hot water boiler must be of the:

Select one:

A. A valve is not permitted in this location
B. Solenoid type
C. Hand wheel type
D. Tee or lever handle design
E. Diaphragm type

Answer 11

D. Tee or lever handle design

Question 12

The relief valve on hot water boilers with a working pressure of up to 414 kPa (60 psi) should open with a variation of _____ below or above the set point.

Select one:

A. 5%
B. 20 kPa (3 psi)
C. 30 kPa (4.5 psi)
D. 14%
E. 10 kPa (1.5 psi)

Answer 12

B. 20 kPa (3 psi)

Question 13

The discharge piping from the relief valve should be piped to a safe point for disposal and can be:

Select one:

A. Connected to any vent
B. Terminated above a floor drain
C. Connected to the condensate tank
D. Connected to any drain
E. Connected to the Deaerator

Answer 13

B. Terminated above a floor drain

Question 14

The temperature of the water in a hot water heating system with an open expansion tank is normally limited to:

Select one:

A. 99°C (210°F)
B. 80°C (175°F)
C. 150°C (302°F)
D. 60°C (140°F)
E. 121°C (250°F)

Answer 14

B. 80°C (175°F)

Question 15

The minimum size of the hot water heating boiler bottom blow off or drain connection shall be:

Select one:

A. 25 mm (1 in.)
B. 6 mm (1/4 in.)
C. 15 mm (1/2 in.)
D. 75 mm (3 in.)
E. 19 mm (3/4 in.)

Answer 15

E. 19 mm (3/4 in.)

Question 16

The purpose of the expansion tank in a hot water heating system is to:

Select one:

A. Provide storage space for excess steam
B. Add make-up water to the system
C. Separate the water and steam produced
D. Provide space to store the returning condensate
E. Provide storage space for excess water

Answer 16

E. Provide storage space for excess water

Question 17

The pressure relief valve is typically installed on the boiler or reasonably close to the boiler outlet with:

Select one:

A. A ball valve for isolation
B. No valve between
C. A glove valve for isolation
D. A plug valve for isolation
E. A gate valve for isolation

Answer 17

B. No valve between

Question 18

On a hot water boiler, the highest value on the graduated scale of the pressure gauge shall not be less than _____ times the pressure at which the pressure relief valve is set.

Select one:

A. 3
B. 2
C. 2.5
D. 3.5
E. 1.5

Answer 18

E. 1.5

Question 19

The automatic fill valve is a _____ valve which keeps the system filled with water and maintains a set pressure in the system.

Select one:

A. Temperature control valve
B. Air vent valve
C. Pressure reducing valve
D. Back pressure valve
E. Pressure control valve

Answer 19

C. Pressure reducing valve

Question 20

The wax filled sensor probe in a combination pressure-temperature relieve valve will expand and open the valve by means of a piston at approximately:

Select one:

A. 50°C (122°F)
B. 110°C (230°F)
C. 134°C (273°F)
D. 60°C (140°F)
E. 99°C (210°F)

Answer 20

E. 99°C (210°F)