Skip to main content
Sign in Register
Question no. 27603

How many safety valves are mandated on a steam boiler to ensure operational safety____________?

Select your answer for: How many safety valves are mandated on a steam boiler to ensure operational safety____________?
Show answer

Answer: C. two

Explanation

Statutory boiler regulations mandate that every steam boiler must be equipped with safety devices. These valves automatically release excess steam pressure to prevent catastrophic vessel explosions. Therefore, exactly two independent safety valves are legally required on steam boilers. Safety valves are spring loaded mechanical devices set to lift at specific pressure limits. Redundancy ensures that if one valve jams, the second valve protects the vessel. Boiler inspectors test these valves regularly to guarantee compliance and safety.

Industrial safety standards prioritize human life and plant asset protection above all else. Over pressurization in steam boilers can lead to massive kinetic energy explosions. Operators face severe legal penalties if they operate boilers without certified safety valves. Four safety valves exceed statutory requirements for standard industrial steam boilers. Three valves are more than the legal minimum mandated by standard boiler codes. A single safety valve is prohibited because redundancy is essential for fail safe operation.

Subject
Engineering
Topic
—
Difficulty
medium

Related questions

Q1. What consequence follows the extraction of residual air from a surface condenser___________?

Select your answer for: What consequence follows the extraction of residual air from a surface condenser___________?
Show answer

Answer: A. fall in absolute pressure maintained in condenser

Extracting residual non condensable air from a surface condenser improves the vacuum. Removing these accumulated gases allows steam to condense more effectively on the tubes. Therefore, removing air results in a direct f...

Q2. What characteristic defines the operation of an impulse steam turbine_____________?

Select your answer for: What characteristic defines the operation of an impulse steam turbine_____________?
Show answer

Answer: C. there is enthalpy drop in nozzles

In an impulse steam turbine the entire steam pressure and enthalpy drop occurs exclusively across the stationary nozzles. Moving blades only change the direction of the high velocity steam jet to extract mechanical impul...

Q3. Fuel cells convert ___________ energy directly into electrical energy.

Select your answer for: Fuel cells convert ___________ energy directly into electrical energy.
Show answer

Answer: B. chemical

Fuel cells are electrochemical devices that facilitate direct energy conversion processes. An electrochemical reaction between hydrogen and oxygen releases usable electrical current. Therefore, fuel cells convert chemica...

Q4. What is the function of an Edward's air pump____________?

Select your answer for: What is the function of an Edward's air pump____________?
Show answer

Answer: D. removes air alongwith vapour and also the condensed water from condenser

An Edward's air pump is designed for marine and stationary steam condenser systems. Its unique plunger design handles air, vapor, and liquid condensate without losing prime. Therefore, it removes air along with vapor and...

Q5. How is the work output produced by a turbine calculated in a Rankine cycle__________?

Select your answer for: How is the work output produced by a turbine calculated in a Rankine cycle__________?
Show answer

Answer: B. change of enthaply between inlet and outlet

The specific work output produced by a turbine in an adiabatic Rankine cycle equals the decrease in enthalpy between inlet and outlet. Applying the steady flow energy equation to an adiabatic turbine shows that work is d...

Q6. How do jet-type condensers operate___________?

Select your answer for: How do jet-type condensers operate___________?
Show answer

Answer: C. steam and cooling water mix

In jet type condensers, exhaust steam and cooling water mix directly together. Direct contact between the fluids provides rapid and efficient steam condensation. Therefore, steam and cooling water mix within a jet type c...