Book 2: 1-03 - "Steam Heating Systems"

Question 1

When the return main of a gravity return system is located below the level of the water line in the boiler, and therefore is always filled with water, it is called a _____ return.
Select one:

A. Wet

B. Dry

C. Heating

D. Upfeed

E. Downfeed

Answer 1

A. Wet

Question 2

When the supply mains are located below the heating units they serve, and the steam is supplied upwards through the risers to the heating units, the system is called a/an _____ system.
Select one:

A. Upfeed

B. Downfeed

C. Under floor

D. Heating supply

E. Steam supply

Answer 2

A. Upfeed

Question 3

One of the causes of insufficient steam supply to the heating units can be attributed to:
Select one:

A. Air vents passing air

B. Proper pitch unrestricted drainage

C. Bypassing of steam to supply line

D. Valves on mains partly closed

E. Piping over sized restricting flow

Answer 3

D. Valves on mains partly closed

Question 4

One of the causes of insufficient steam supply to the heating units can be attributed to:
Select one:

A. Valves on mains wide open

B. Air vents passing steam

C. Piping over sized restricting flow

D. Bypassing of steam to supply line

E. Proper pitch unrestricted drainage

Answer 4

B. Air vents passing steam

Question 5

In all systems, the vertical pipes to the various floors are called the:
Select one:

A. Steam lines

B. Return lines

C. Mains

D. Risers

E. Steam pipes

Answer 5

D. Risers

Question 6

Before a boiler can be fired it must first have a/an:
Select one:

A. Current inspection certificate

B. Visual internal waterside inspection

C. Welding inspection

D. Visual internal fireside inspection

E. Thorough cleaning

Answer 6

A. Current inspection certificate

Question 7

One of the causes of insufficient steam supply to the heating units can be attributed to:
Select one:

A. Proper pitch unrestricted drainage

B. Air vents passing air

C. Valves on mains wide open

D. Bypassing of steam to return line

E. Piping over sized restricting flow

Answer 7

D. Bypassing of steam to return line

Question 8

When the return main is located above the water line, which is usually only partly filled with condensate and will drain dry when the flow of condensate ceases, is called a _____ return.
Select one:

A. Wet

B. Upfeed

C. Dry

D. Downfeed

E. Heating

Answer 8

C. Dry

Question 9

The piping and heating units of a steam heating system must be so arranged that:
Select one:

A. The air can be contained in the heating units and piping

B. Steam can flow in insufficient quantities to all heating units

C. Steam can flow freely to all heating units

D. The condensate can flow freely from the boiler

E. The condensate can be returned freely to these units

Answer 9

C. Steam can flow freely to all heating units

Question 10

In a gravity return system, the boiler should be placed:
Select one:

A. As far as possible from the radiators

B. At the same level as the radiators

C. Well below the lowest radiator

D. Well above the highest radiator

E. On an elevated platform

Answer 10

C. Well below the lowest radiator

Question 11

The piping and heating units of a steam heating system must be so arranged that:
Select one:

A. The condensate can flow freely from the boiler

B. Steam can flow in sufficient quantities to all heating units

C. The air can be contained in the heating units and piping

D. The condensate can be returned freely to these units

E. Steam can flow freely from all heating units

Answer 11

B. Steam can flow in sufficient quantities to all heating units

Question 12

The piping and heating units of a steam heating system must be so arranged that:
Select one:

A. Steam can flow freely from all heating units

B. Steam can flow in insufficient quantities to all heating units

C. The condensate can flow freely from the boiler

D. The air can be contained in the heating units and piping

E. The condensate can be removed freely from these units

Answer 12

E. The condensate can be removed freely from these units

Question 13

In a _____ system, the mains are located above the heating units.
Select one:

A. Heating supply

B. Steam supply

C. Downfeed

D. Upfeed

E. Under floor

Answer 13

C. Downfeed

Question 14

In all systems, the horizontal steam supply pipes between boiler and heating units are called the:
Select one:

A. Mains

B. Steam pipes

C. Return lines

D. Risers

E. Steam lines

Answer 14

A. Mains

Question 15

One of the causes of insufficient steam supply to the heating units can be attributed to:
Select one:

A. Air vents passing air

B. Valves on mains wide open

C. Bypassing of steam to supply line

D. Improper pitch restricting drainage

E. Piping over sized restricting flow

Answer 15

D. Improper pitch restricting drainage

Question 16

One cause of insufficient steam supply to a steam heating units may be:
Select one:

A. Bypassing of steam to supply line

B. Piping correct size unrestricted flow

C. Air vents passing air

D. Proper pitch unrestricted drainage

E. Valves on mains wide open

Answer 16

A. Bypassing of steam to supply line

Question 17

The Hartford loop prevents steam pressure from forcing boiler water back into the return line should the:
Select one:

A. Boiler pressure get to high

B. Feedwater supply fail

C. Boiler temperature be to high

D. Check valve fail to close

E. Water level get to high

Answer 17

D. Check valve fail to close

Question 18

A leaking steam trap will allow steam to blow from the radiator into the:
Select one:

A. Return lines

B. Atmosphere

C. Steam risers

D. Boiler

E. Steam mains

Answer 18

A. Return lines

Question 19

Steam in a two-pipe, vacuum return system is supplied pressures up to:
Select one:

A. 103 kPa (15 psi)

B. 75 kPa (10 psi)

C. 15 kPa (2 psi)

D. 50 kPa (7 psi)

E. 200 kPa (30 psi)

Answer 19

A. 103 kPa (15 psi)

Question 20

The piping and heating units of a steam heating system must be so arranged that:
Select one:

A. The condensate can be returned freely to these units

B. The condensate can be returned freely to the boiler

C. The air can be contained in the heating units and piping

D. Steam can flow freely from all heating units

E. Steam can flow in insufficient quantities to all heating units

Answer 20

B. The condensate can be returned freely to the boiler