If a boiler has more than 500ft of water heating surface and power input more than 1100 kw how many relief valves are required?

If a boiler has more than 500ft of water heating surface and power input more than 1100 kw how many relief valves are required? A. 1 B. 2 C. 3 D....

How many relief valves a boiler should have?

How many relief valves a boiler should have? A. 1 B. 2 C. 3 D. 4 Answer: ...

Which code provides recommendations for the testing, operation and maintenance of safety valves?

Which code provides recommendations for the testing, operation and maintenance of safety valves? A. ASME code section I B. ASME code section II C....

Temperature relief device opens when water temperature rises to about

Temperature relief device opens when water temperature rises to about A. 95C B. 99C C. 96C D. 94C E. 98C Answer:...

Which one is NOT a cause for a relief valve in a heating boiler that is opening or spilling?

Which one is NOT a cause for a relief valve in a heating boiler that is opening or spilling? A. Scale will form if the temperature of the heater...

Who can repair a safety valve?

Who can repair a safety valve? A. Boiler operator only if fully qualified to do so and authorization from the chief inspector B. Manufacture C. Authorized...

When should the pop test be performed?

When should the pop test be performed? a. Weekly b. Monthly c. Semi-annually d. Annual e. Bi-weekly Answer:...

The try lever test should not be used on low pressure boilers unless pressure is at least

The try lever test should not be used on low pressure boilers unless pressure is at least A. 33 kPa B. 36 kPa C. 35 kPa D. 32 kPa E. 31 kPa Answer:...

The main advantage of the torsion bar safety valve is

The main advantage of the torsion bar safety valve is A. Used on high pressure boilers B. Machined to much finer specifications C. More durable than...

Torsion bar safety valve is designed for use on boilers operating at?

Torsion bar safety valve is designed for use on boilers operating at? A. 6000 kPa B. 4000 kPa C. 7000 kPa D. 8000 kPa E. 5000 kPa Answer:...

Superheater safety valves has a exposed spring because?

Superheater safety valves has a exposed spring because? A. Prevent high temperature from destroying the spring B. Prevent high pressure from destroying...

Cast-iron safety valve is are not used on what?

Cast-iron safety valve is are not used on what? A. Boilers B. Heating Boilers C. Superheaters D. Electric Boilers E. Reheater Answer:...

Cast-iron safety valve is suitable for pressures up to?

Cast-iron safety valve is suitable for pressures up to? A. 1700 kPa B. 1720 kPa C. 1740 kPa D 1760 kPa E. 1780 kPa Answer:...

The safety valve popping pressure may be increased or decreased by a maximum of?

The safety valve popping pressure may be increased or decreased by a maximum of? A. 3% B. 2% C. 5% D. 4% E. 6% Answer:...

A wire seal on a safety valve is installed by

A wire seal on a safety valve is installed by a. a power engineer b. boiler inspector c. an engineer d. an ASME-certified valve repair agency e....

Which code states that "Pressure relief valves shall be designed and constructed without chattering"

Which code states that "Pressure relief valves shall be designed and constructed without chattering" A. ASME Code Section I, PG 68 B. ASME Code...

The difference between the pressure at which the valve opens and closes is called?

The difference between the pressure at which the valve opens and closes is called? A. Popping pressure B. Blowdown C. Discharge D. None of the above Answer:...

The pop chamber is provided with what that allows steam to escape from under the skirt?

The pop chamber is provided with what that allows steam to escape from under the skirt? A. Blowdown ring B. Escape port C. Seat D. Spindle E. Valve...

Another name for the pop chamber is?

Another name for the pop chamber is? A. Skirt chamber B. Escape chamber C. Huddling chamber D. Spindle chamber E. Spring chamber Answer:...

Another name for the lip on a safety valve is?

Another name for the lip on a safety valve is? A. Skirt B. Escape port C. Seat D. Spindle E. Pop Chamber Answer:...

The pop valve is provided with ___ which becomes filled with steam when the valve starts to open.

The pop valve is provided with ___ which becomes filled with steam when the valve starts to open. A. Ports B. Blowdown ring C. Spring D. Cap E. Lip Answer:...

If the safety valve is open and there is no pressure in the boiler, what will happen?

If the safety valve is open and there is no pressure in the boiler, what will happen? A. Nothing B. Safety valve will not open unless there is pressure C....

When the safety valve has been set by the adjusting nut a ___ is put in place.

When the safety valve has been set by the adjusting nut a ___ is put in place. A. Spring B. Cap C. Valve disc D. Lock nut E. Lever Answer:...

The adjusting nut on a safety valve is prevented from shifting after adjustment by?

The adjusting nut on a safety valve is prevented from shifting after adjustment by? A. Spring B. Cap C. Valve disc D. Lock nut E. Lever Answer:...

The valve disc on a safety valve is held firmly on its seat by the pressure of the?

The valve disc on a safety valve is held firmly on its seat by the pressure of the? A. Ports B. Blowdown ring C. Spring D. Cap E. Lock nut Answer:...

The point at which the safety valve will lift and relieve the pressure is adjusted by?

The point at which the safety valve will lift and relieve the pressure is adjusted by? a. Inspector's seal b. Valve disc c. Adjusting nut d. Adjusting...

Which code states the rules governing superheater and reheater safety valves?

Which code states the rules governing superheater and reheater safety valves? A. ASME Code Section I, PG 68 B. ASME Code Section I, PG 67.2 C. ASME...

Which code states that "Each boiler shall have at least one pressure relief valve"?

Which code states that "Each boiler shall have at least one pressure relief valve"? A. ASME Code Section I, PG 68 B. ASME Code Section I, PG 67.2 C....

Which code states that "the pressure relief valve capacity for each boiler"?

Which code states that "the pressure relief valve capacity for each boiler"? A. ASME Code Section I, PG 68 B. ASME Code Section I, PG 67.2 C. ASME...

If an electric boiler has a power input more than 1100kW, how many pressure relief valves should it have?

If an electric boiler has a power input more than 1100kW, how many pressure relief valves should it have? A. 1 B. 2 C. 3 D. 4 E. 5 Answer:...

Do not open the safety valve with the test lever:

Do not open the safety valve with the test lever: a. If the valve is less than 2.5 cm inlet diameter b. If the pressure is less than 75% working...

To increase the opening pressure of a safety valve,:

To increase the opening pressure of a safety valve,: a. Raise the blowdown ring b. Increase spring compression c. Reduce spring compression d. Lower...

If a safety valve leaks after a try lever test, the operator should:

If a safety valve leaks after a try lever test, the operator should: a. Plug the safety valve outlet b. Reduce the boiler pressure c. Operate the...

If a boiler has a maximum allowable working pressure of 1000 kPa, what would be the maximum pressure allowed when the safety valve is open?

If a boiler has a maximum allowable working pressure of 1000 kPa, what would be the maximum pressure allowed when the safety valve is open? a. 1060...

An operator should check that a boiler safety valve will open at its set pressure by:

An operator should check that a boiler safety valve will open at its set pressure by: a. Asking the inspector to bring a master pressure gauge b....

A safety relief valve is similar to a safety valve except that it:

A safety relief valve is similar to a safety valve except that it: a. Does not have a blowdown ring or bottom guides b. Must have greater blowdown c....

It is considered good practice to do a try lever test on a safety valve on a/an __________ basis:

It is considered good practice to do a try lever test on a safety valve on a/an __________ basis: a. Weekly b. Monthly c. Semi-annually d. Annual e....

The discharge pipe from a boiler safety valve is supported independently of the safety valve:

The discharge pipe from a boiler safety valve is supported independently of the safety valve: a. Because the steam drum cannot support the extra mass...

Temperature relief valves can open on a rise in temperature by the expansion of a wax-filled rod or by the:

Temperature relief valves can open on a rise in temperature by the expansion of a wax-filled rod or by the: a. Melting of the alloy in a fusible plug b....

When performing a safety valve pop test, one of the first things to do is:

When performing a safety valve pop test, one of the first things to do is: a. Notify the boiler inspector b. Verify the accuracy of the boiler steam...

The set pressure of a safety valve may only be adjusted by:

The set pressure of a safety valve may only be adjusted by: a. a power engineer b. a plumber c. an engineer d. an ASME-certified valve repair agency e....

The test lever on a safety valve must not be used unless the boiler:

The test lever on a safety valve must not be used unless the boiler: a. Is at maximum operating pressure b. Has no load on it c. Inspector approves...

The purpose of the spring in a safety valve is to:

The purpose of the spring in a safety valve is to: a. Help open the testing lever b. Pull open the valve at blowing pressure c. Adjust the pressure...

If a boiler has only one safety valve, its heating surface must not exceed

If a boiler has only one safety valve, its heating surface must not exceed a. 75 m2 b. 47 m2 c. 36 m2 d. 28 m2 e. 19 m2 Answer:...

Testing a safety valve on a boiler by pulling the try-lever

Testing a safety valve on a boiler by pulling the try-lever a. Ensures the popping pressure is correct b. Indicates that valve capacity is adequate c....

If a boiler was fired with the main steam stop valve closed, the safety valves should ensure that the:

If a boiler was fired with the main steam stop valve closed, the safety valves should ensure that the: a. Pressure cannot exceed the maximum working...

Safety valves "pop" open because the pressure of the steam:

Safety valves "pop" open because the pressure of the steam: a. Acts upon a blow down ring b. Acts upon a huddling chamber c. Acts upon a larger area...

If the safety valves on a boiler are undersized, the boiler pressure may:

If the safety valves on a boiler are undersized, the boiler pressure may: a. Rise 5% above the maximum allowable working pressure MAWP b. Not rise...

The blowdown on a safety valve is adjusted by turning the:

The blowdown on a safety valve is adjusted by turning the: a. Inspector's seal b. Valve disc c. Adjusting nut d. Adjusting ring e. Valve seat Answer:...

The safety valves on a boiler and are set to open at 1380 kPa. What is the maximum permissible pressure rise in the boiler if it is fired at full capacity with the steam outlet valve closed?

The safety valves on a boiler and are set to open at 1380 kPa. What is the maximum permissible pressure rise in the boiler if it is fired at full capacity...

What is the minimum number of safety valves required on a boiler that has a heating surface of 42 m2?

What is the minimum number of safety valves required on a boiler that has a heating surface of 42 m2? a. None b. One c. Two d. Three e. Four Answer:...

Which one is NOT a disadvantage of the FBC system?

Which one is NOT a disadvantage of the FBC system? A. Carryover B. High power requirements for combustion air C. Large space required for installation D....

Less maintenance is required on the FBC because?

Less maintenance is required on the FBC because? A. Slag is eliminated B. Clinkers is eliminated C. Soot-blowers are not required D. Dry combustion...

What is an advantage of the FBC?

What is an advantage of the FBC? A. Flexibility of fuel choices B. Less maintenance C. Smaller plant size D. Less fuel feed E. All of the above Answer:...

The steam turbine in the PFBC system, about what percentage of power is produced?

The steam turbine in the PFBC system, about what percentage of power is produced? A. 50% B. 30% C. 60% D. 40% E. 70% Answer:...

The gas turbine in the PFBC system, about what percentage of power is produced?

The gas turbine in the PFBC system, about what percentage of power is produced? A. 50% B. 30% C. 60% D. 20% E. 70% Answer:...

Velocities in the AFBC system through the bed of the fluidizing air are in a range of?

Velocities in the AFBC system through the bed of the fluidizing air are in a range of? A. 1 - 2 m/s B. 2 - 3 m/s C. 3 - 4 m/s D. 4 - 5 m/s E. 6 -...

AFBC has two sub classes which are?

AFBC has two sub classes which are? A. Pressurized bed, circulating bed B. Bubbling bed, fluidized bed C. Fluidized bed, pressurized bed D. Bubbling...

The AFBC can produce up to ___ kg/h of steam but it will soon increase to ___ kg/h.

The AFBC can produce up to ___ kg/h of steam but it will soon increase to ___ kg/h. A. 300 000 to 500 000 B. 400 000 to 800 000 C. 500 000 to 1 000...

Which one is NOT a disadvantage of the Flue Gas Desulphurization (FGD) system?

Which one is NOT a disadvantage of the Flue Gas Desulphurization (FGD) system? A. Required a lot of space B. Expensive to build C. Troublesome to...

In a fluidized bed boiler, a gradual loss of the fluidized bed, including fuel (carbon) particles, is due to:

In a fluidized bed boiler, a gradual loss of the fluidized bed, including fuel (carbon) particles, is due to: a. Carryover b. Uplift c. Priming d....

A design disadvantage of a pressurized fluidized bed furnace is:

A design disadvantage of a pressurized fluidized bed furnace is: a. Erosion and/or corrosion/fouling of turbine blades may occur b. A wide range...

Fluidized bed boilers can successfully burn coal with ash contents as high as

Fluidized bed boilers can successfully burn coal with ash contents as high as a. 10% b. 30% c. 55% d. 60% e. 70% Answer:...

Large "clinkers" are not produced in fluidized bed furnaces because of:

Large "clinkers" are not produced in fluidized bed furnaces because of: a. Lower furnace temperatures b. Fast fluidization air movement c. The kind...

In order to get maximum heat transfer in a bubbling bed furnace, it is necessary to:

In order to get maximum heat transfer in a bubbling bed furnace, it is necessary to: a. Increase the fuel consumption per hour b. Ensure that the...

To effectively remove fine dust from flue gas, the most common method in power plants uses:

To effectively remove fine dust from flue gas, the most common method in power plants uses: a. Cyclone separators and filter beds b. Oil wetted...

The efficiency of a combined cycle plant, using a pressurized fluidized bed boiler, is about _____ higher than that of a conventional pulverized coal plant.

The efficiency of a combined cycle plant, using a pressurized fluidized bed boiler, is about _____ higher than that of a conventional pulverized coal...

In an atmospheric fluidized bed boiler, the combustion air pressure is typically 25 cm of water at the FD fan, 16 cm of water at the base of the active bed and _____ at the top of the combustion mass:

In an atmospheric fluidized bed boiler, the combustion air pressure is typically 25 cm of water at the FD fan, 16 cm of water at the base of the active...

Due to the comparative size of FBC power plants, a significant saving is gained in:

Due to the comparative size of FBC power plants, a significant saving is gained in: a. Fuel and waste costs b. Material and construction costs c....

In fluidized bed combustion, the fuel content (by mass) in the turbulent material is usually:

In fluidized bed combustion, the fuel content (by mass) in the turbulent material is usually: a. greater than 25% b. extremely high in sulfur c....

The inert bed material of a fluidized bed boiler must be heated to about __________ °C.

The inert bed material of a fluidized bed boiler must be heated to about __________ °C. a. 350 b. 500 c. 600 d. 750 e. 900 Answer:...

Limestone, when added to a fluidized bed boiler

Limestone, when added to a fluidized bed boiler a. Lowers the combustion bed temperature b. Acts as a de-sulphuring agent c. Absorbs NOx d. Reduces...

The typical time required to heat a fluidized bed to ignition temperature prior to the introduction of coal is:

The typical time required to heat a fluidized bed to ignition temperature prior to the introduction of coal is: a. One hour b. 30 minutes c. Two hours d....

The feed-through tubes of a fluidized bed boiler are located in the:

The feed-through tubes of a fluidized bed boiler are located in the: a. Windbox b. Furnace ceiling c. Furnace walls d. Corners of the furnace e. Furnace...

One operating variable that is manipulated relatively easily and which the operators of FBC boilers must always be aware, is:

One operating variable that is manipulated relatively easily and which the operators of FBC boilers must always be aware, is: a. Slag production b....

In a typical bubbling fluidized bed boiler, to what depth is the combustion bed maintained?

In a typical bubbling fluidized bed boiler, to what depth is the combustion bed maintained? a. 1.5 meters b. 1 meter c. 2 meters d. 2.5 meters e....