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1st Year Low Pressure Boiler > Chapter 9- Hot Water Boilers and Fittings > Flashcards

Chapter 9- Hot Water Boilers and Fittings Flashcards

1
Q

What is a Hot Water Heating System?

A

A heating system that produces hot water in a boiler and manages the circulation of the water to transfer heat to the point of use

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2
Q

How much does a typical steam operates in f?

A

212 f

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3
Q

How much does hot water system operate at?

A

170-180 f for supply water and return water it would be 150-160 f

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4
Q

What is a Natural- Circulation Hot water heating system?

A

An older open, unpressurized heating system that circulates hot water using the difference in water density between hot water supplied to heating units and cool water returned to the boiler

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5
Q

What is an Expansion Tank?

A

A vented tank located above the heating units that function as a pressure relief device in a hot water heating system

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6
Q

What is a Forced-Circulation hot water heating system?

A

A closed, pressurized system that circulates hot water using a circulating pump

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7
Q

What is a circulating pump?

A

A hot water heating system accessory that moves water through the boiler, hot water system piping and heating units

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8
Q

What is a back flow preventer?

A

A boiler accessory that prevents the flow of water back to the portable water supply

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9
Q

What is classified as low pressure hot water boiler?

A

When the temperature does not exceed 250f and water pressure not exceeding 160 psig

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10
Q

What is Combustion Efficiency?

A

A measure of how efficiently a boilers burner burns fuel without considering any losses

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11
Q

What is thermal efficiency?

A

A measure of how efficiently a boiler burner burns fuel while accounting for radiation and convection losses

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12
Q

What is Steady-State Efficiency?

A

A measure of how efficiently a boiler uses heat from the combustion process when operating under full load

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13
Q

What is Seasonal Efficency?

A

A measure of how efficiently a boiler uses fuel over an entire heating season

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14
Q

What is a condensing boiler?

A

A hot water boiler fueled by gas or oil that achieves high efficiency by condensing the vapor in exhaust gases and recovering its latent heat of vaporization.

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15
Q

Is condensate from the gases of combustion slightly acidic or alkaline?

A

Slightly Acidic

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16
Q

What is a condensate neutralizer?

A

A neutralizer that is added to acidic condensate to prevent corrosion

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17
Q

What do they add in the condensate neutralizer?

A

They connect a plastic container filled with alkaline marble or limestone chips to the drainpipe

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18
Q

What is a Electric Boiler?

A

A boiler that uses electrical heating elements in order to heat water for residential or light commercial hot water heating system

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19
Q

What is an immersion heater?

A

A series of copper rods enclosed in waterproof tubes installed in a boiler and surrounded by water

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20
Q

What is a tankless boiler?

A

A hot water boiler that heats water without a tank

21
Q

What is a burner?

A

Is the heat producing component of combustion boiler where fuel is burned

22
Q

What is a tubular burner?

A

A burner consisting of tubes with drilled holes that allow pressurized gas to escape into the furnace where the gas is burned

23
Q

What is a burner controlled by?

A

A burner is controlled by an embedded control system with built in logic to control the output of the burner to match the load and give the best performance

24
Q

What is a power burner?

A

A burner with a forced air fan that brings air under pressure into close contact with the fuel

25
Q

What is an igniter?

A

A device used to set fire to the fuel in a burner

26
Q

What are the two type of electric igniters?

A

The electric spark igniter and the hot surface igniter

27
Q

What is a pilot burner?

A

A small burner located near burner tubes that ignites the air-fuel mixture released into the burner

28
Q

What is an electric spark igniter?

A

A device that is located near a burner that produces a spark to ignite fuel in the burner

29
Q

What is a Hot Surface igniter?

A

A device located at a burner that uses a small piece of silicon nitride, which produces high temperatures when electric current passes through it

30
Q

What is a hot water boiler fitting?

A

They are components directly attached to a boiler that are required to ensure the safe and efficient operation of the boiler

31
Q

What is a relief valve?

A

A boiler fitting that protects a hot water boiler from exceeding its MAWP

32
Q

How many times should a try lever test be preformed?

A

Every 30 days

33
Q

What is a safety valve?

A

Is a valve that is automatic, pop action valve that is open by an overpressure in the boiler to relive the boiler overpressure

34
Q

What is a safety relief valve?

A

A automatic valve that can be used as a safety valve or relief valve

35
Q

What is a low water fuel cutoff?

A

A boiler fitting that detects low water in the boiler which turns off the burner

36
Q

Where should the water fuel cutoff be located at?

A

It must be located on piping near the boiler or on the associated piping system above the lowest permissible water level in the boiler

37
Q

What are the two types of water fuel cutoff?

A

The probe type and the float type

38
Q

What is a float type water cutoff?

A

Is a float that has the same amount of water level as the boiler and if the water level drops then the float drops in the chamber

39
Q

What is a probe type water cutoff?

A

Is an electrode probe inserted directly into the boiler or boiler supply piping to monitor the water level in the boiler and the piping

40
Q

How many times should a low water fuel cutoff be checked?

A

Once a year

41
Q

What is a water flow proving switch?

A

A boiler fitting used to prove that water is flowing in a hot water system

42
Q

What is a pressure gauge?

A

A boiler fitting that displays the amount of pressure in pounds per square inch (psi) inside a boiler

43
Q

What is a compound gauge?

A

A pressure gauge that displays vacuum in inches of mercury (“Hg) and pressure in pounds per square inch (psi)

44
Q

What is a snubber?

A

A pipe coupling like device that protects a pressure gauge from surges

45
Q

What is a temperature pressure gauge?

A

A boiler fitting that indicates both the temperature and pressure of the water leaving the boiler

46
Q

What is an altitude pressure gauge?

A

A boiler fitting consisting of a needle gauge on a boiler used to indicate when the system is properly filled

47
Q

What is an aqua stat?

A

A hot water boiler fitting that measures the water temperature in the boiler and controls the temperature by starting and stopping the burner

48
Q

Why is a hot water reset control?

A

A hot water boiler fitting that serves as a boiler water set point temperature control system with an outside air thermostat

49
Q

What is an outside air thermostat?

A

A thermostat used to measure the temperature of outside air and then send signals to control the temperature of the water in a hot water boiler

1st Year Low Pressure Boiler (11 decks)

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