What term describes the generation of 15.653 kg of steam per hour from and at 100°C_________________?
Show answer Hide answer
Answer: D. one boiler h.p.
Explanation
Boiler horsepower is an historical engineering unit used to quantify the steaming capacity of industrial steam generators. It is formally defined as the thermal energy required to evaporate 15.653 kilograms of water per hour at 100 degrees Celsius. The process assumes water enters at 100 degrees Celsius and transforms completely into dry saturated steam at atmospheric pressure. One boiler horsepower is equivalent to a heat transfer rate of approximately 33,475 British thermal units per hour. This metric standardizes boiler ratings independently of the feed water temperature and operating pressure variations. Modern large utility boilers are rated in megawatts of thermal output or kilograms per hour of steam rather than boiler horsepower.
Evaporative capacity refers generally to the total mass of steam generated per hour without specifying the 100 degree standard. Factor of evaporation is a multiplier used to convert actual evaporation rates into equivalent evaporation from and at 100 degrees. Equivalent evaporation is the overall calculated result, whereas boiler horsepower is the specific numerical definition given in the prompt.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. What is a major limitation associated with a product layout manufacturing system_________________?
Show answer Hide answer
Answer: A. high initial investment for the specialized facilities
A product layout arranges dedicated machinery in a fixed linear sequence for mass production. Purchasing specialized, single-purpose equipment for every specific operation requires massive capital. This high initial fina...
Q2. What essential electrical component is required to generate high-voltage ignition sparks in a battery-powered petrol engine_______________?
Show answer Hide answer
Answer: B. ignition coil and distributor
Battery-powered petrol engines operate on low primary circuit voltage that cannot bridge spark plug gaps. An ignition coil steps up the battery voltage to thousands of volts required for firing sparks. A distributor then...
Q3. A compressor has a capacity rating of 5 m/min. What does this 5 m/min measurement indicate_______________?
Show answer Hide answer
Answer: B. free air
Compressor capacity ratings are conventionally expressed in terms of free air delivered under ambient atmospheric conditions. Free air standardizes volumetric output measurements regardless of intake temperature, humidit...
Q4. What is the primary structural difference between a Cornish boiler and a Lancashire boiler_________________?
Show answer Hide answer
Answer: C. former contains one fire tube and latter contains two fire tubes
Boiler classifications often depend on the number and arrangement of internal furnace tubes. The Cornish boiler features a single internal fire tube running through its shell. In contrast, the Lancashire boiler is struct...
Q5. What fundamental fluid mechanics principle is expressed by the continuity equation__________________?
Show answer Hide answer
Answer: C. conservation of mass
The continuity equation relates fluid velocity, cross-sectional area, and density throughout a flow field. It ensures that mass is neither created nor destroyed as a fluid moves through pipes or channels. Mathematically,...
Q6. What is fluid flow called when particle velocities fluctuate unpredictably in both magnitude and direction from point to point and instant to instant__________________?
Show answer Hide answer
Answer: D. turbulent flow
Turbulent flow features chaotic fluid particle velocity fluctuations occurring unpredictably in both magnitude and direction. Fluid particles mix violently across adjacent layers, creating eddies, vortices, and high inte...