What are boiler fittings?

What are boiler mountings?

What are the 13 essential fittings?

What type of pressure gage is commonly attached to steam boiler?

How often do you calibrate the pressure gages and what are the methods?

What should be the range of the pressure gage? What is the accuracy of the pressure gage and what shall you do if the pressure gage does not read accurate value?

What are the specifications of a boiler pressure gage for power boilers as stipulated by ASME Code?

What is the safety feature of a pressure gage used for steam application?

Draw a siphon and describe why it is necessary for a pressure gage in the application of steam?

What is the possible cause of a pressure gage to lose its accuracy

You walk into the boiler room and observe that the gage glass is full with water. What is your next action?

Why it is important to have the lever handle of all cocks parallel to the longitudinal centerline of the gage when the cocks are in normal working condition?

Why it is important to have a feed check valve in the boiler feed line?

What are the common types of valve used for the steam stop valve (main stop valve)?  Describe the advantages and disadvantages. 

Explain the ASME Codes for the installation of main stop valves.

How many stop valves are required if a boiler is connected to a common steam header, and why?

Explain the ASME Codes for the installation of feedwater valves.

What is the difference between blowoff and blowdown valves?

How do you determine if a blowdown valve is leaking?

Describe the blowdown valve used in your boiler.

What are the requirements for blowdown or blowoff lines as stipulated in ASME Code Section I?

For firetube boilers, if the blowdown piping is exposed to the products of combustion, how shall it be attached to the boiler?

For firetube boilers, if the blowdown piping is NOT exposed to the products of combustion, how shall it be attached to the boiler?

What kind of valves may not be used as blowoff valves?

What kind of valves that shall be used as blowoff valves? What are the requirements?

What is the pressure rating of the valves and size required for blowoff line?

What materials should be used for blowoff line, and above what pressure is schedule 80 required for the blowoff line?

How do you operate blowoff valves during operation and how do you prevent water hammering and thermal stress from occurring during blowing off?

What are the typical connections on a boiler?

Can you install a 3-inch national pipe thread safety valve on a 150-psi boiler?

What is the harmful effect of cavitation to a pump? ^{NEW 2ND EDITION}  

What are the five criteria to select a boiler feed pump?  ^{NEW 2ND EDITION}  

What are the items of a boiler control and fittings that should be calibrated? ^{NEW 2ND EDITION}  

What are the common types of feedwater pumps?

Describe the construction and working principle of anyone of the pumps that you have listed.

What are the codes for boiler feedwater pump as stipulated by ASME Code?

What are the codes for feedwater supply as stipulated by ASME Code?

What shall be the pressure rating of feedwater supply line from the boiler to the required check valve?

What are the legal requirements of gage glass of ASME Section I?

What are the types of water level gages?

What are the settings of installation of the gage glass for watertube and firetube boiler?

Describe the principle operation of a prismatic or reflective gage glass.

State the advantages of reflex-type water gage over the tubular glass water gage.

Draw a gage glass of tubular type.

Sketch a water gage of the flat (transparent) type. 

Sketch a water gage of the reflex type.

When are two gage glasses required on a power boiler?

Under what condition that a boiler does not require a gage glass?

You notice that there is only one gage glass provided.  The question is: The code stipulates that you need to have two gage glasses on a boiler.  In this locomotive boiler, there is only one.  Is this against the code?

What are the code rules of installation of water level glass on a locomotive boiler?

How do you know if steam cock is clogged?

How do you know if water cock is clogged?

How often do you test water level gages?

Under what condition does it allow by the code to shutoff one gage glass on high pressure boiler?

Why do you need to test gage glass every shift when the boiler is equipped with low water alarm, Mobrey water level control, and three-element controls?

How do you test a gage glass?

In water level gage for high-pressure watertube boiler, sheets of mica are fitted on the surface of the glass plates on the pressure side, what is the reason?

What can affect the accuracy of level gage glasses?

How do you change broken gage glass during steaming?

If a gage glass broken, can the water inside the boiler leak through the broken glass?

How do you change broken gage glass during steaming?

If a gage glass broken, can the water inside the boiler leak through the broken glass?

What is water column?

Should water column be blown down?

What is the specification of water columns according to the ASME Code of Section I?

What is the purpose of an air cock?

Why it is not recommended to open air cock (air vent) to release steam at a higher pressure (above 2 bars)?

How can vacuum formed in boiler?

Why is vacuum dangerous in boiler?

What types of safety valves are required on steam boilers?

What is the general principle on which a safety valve works?

Can the superheater safety valve be counted as part of the boiler relieving capacity? If so, under what limits?

Does a superheater require a safety valve?

If you have a superheater safety valve, pertaining to the code, do you still have to install two safety valves on the steam drum?

Which one should be set higher, the main drum safety valve or the superheater safety valve?

Would you install a shut-off valve between the boiler and its safety valve?

Which safety valve should you set first, the lower pressure or the higher pressure? Indicate reasons in your answer.

Why must there be a difference between the safety valve set pressure and the normal operating pressure?

What is the recommended pressure differential between operating pressure and safety valve set pressure?

If a boiler has a MAWP of 400 psi, what should be its maximum operating procedure?

Sketch all parts of a typical spring-loaded safety valve normally installed on a water tube boiler.

Describe the full procedure of resetting the valves under steam after overhaul.

What is the discharge capacity of a superheater safety valve?

What is the maximum pressure a boiler can be subjected during operation?

What shall be the material of safety valve springs?

How much may the spring of a safety valve be reset?

Explain the method of checking safety valve capacity by calculation.  How would you mount the safety valves?

How do you determine the size of the openings in the shell of boilers to install safety valves?

Can you try the lever of safety valve during high firing rate?

How often would you lift the try-lever of the safety valves?

Upon inspection, the disk of a safety valve is found to have scratched and can cause leaking if it is not rectified soon.  Recommend the repair procedures.

What is the difference between a relief valve, a spring-loaded safety valve, and a high-lift safety valve?

What are the code rules for pressure setting of safety valve?

What is blowback pressure of a safety valve? What are the blowback  pressures specified under the code?

What happen if the blowback pressure is not enough?

What are the common problems with safety valves?

What is the recommended method of installation of a safety valve on a boiler chest?

What are the installation mistakes of safety valves?

Can dead-weighted safety valves (also called weight-and-lever safety valves) be used on steam boilers?

Safety valves come in close bonnet that encloses the spring and open bonnet, which exposed the spring to ambient.  What are the guidelines in installation of both types of safety valves on power boilers?

What are the three ways of measuring (i.e. testing) the required safety valve capacity of a boiler?

In normal operating condition, do you let your safety valve blow by itself once in a while?

What information can you find on the manufacturer’s nameplate of a safety valve?

Explain the principle operation of safety valve “pop” type.

What is a rupture (bursting) disk and when it is necessary to install rupture disk?

If a rupture disk is to be installed alongside a safety valve, what shall be the requirements and the pressure rating?

How fusible plug protects the boiler?

What is the type of fusible plug commonly used in boilers?

Pertaining to the code, what should be the material and the size of a fusible plug?

How often does it require to renewing fusible plugs? Why?

Where is the location of fusible plugs in water-tube and fire-tube boilers?

You are shown with a Monel float, which contained water inside.  The question is: Is this condition normal?

What is boiler feedwater regulator?

Is it required to install high water level alarms on power boilers?

What is the normal installation of low water fuel cut-off (LWCO)?

Why are two units of level controllers (two float chambers) installed on power boilers?

What is the difference between modulating and on-off automatic level control?

What is the float-type water-level controller mounted on the boiler?

What is low-water fuel cutout?

How often does it require to test the low-water alarm or fuel cutoff?

What can make the low-water fuel cutoff faulty?

Describe the low-water fuel cutout (LWCO) system installed on boilers.  State the limitations inherent in the system and suggest how these limitations can be overcome.

How many types of water level sensors commonly used in steam boilers? Describe each of them.

How would you test low-water alarm or fuel cutoff?

Draw a manhole cover plate and describe the construction and related statutory codes.

What is a feed check valve?  Draw at least 3 types of check valves commonly used for boiler and describe their working principles and functions.   What are the requirements for installation of feed check valve on a boiler?

Why are manholes oval?

What is a steam pressure-reducing valve? Describe its operation.

Why is it necessary to install a safety valve on the exit side of the pressure-reducing valve?

What is the typical pipe arrangement for pressure-reducing valve?

What are the code rules for installation of a pressure reducing valve (PRV)?

Sketch and describe the operation of inverted-bucket and ball-float steam traps:

Describe in detail the operation of an inverted-bucket steam trap. Steam Trap