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What will happen to the volume of a confined gas if the pressure is tripled at constant temperature?
What will happen to the volume of a confined gas if the pressure is tripled at constant temperature?
What is the pressure of 750 mmHg in kilopascals (kPa)?
What is the pressure of 750 mmHg in kilopascals (kPa)?
If a gas with an unknown volume expands to a container of 10 m³ at 500 mmHg, what is the unknown volume if the initial pressure is 1 atmosphere?
If a gas with an unknown volume expands to a container of 10 m³ at 500 mmHg, what is the unknown volume if the initial pressure is 1 atmosphere?
What is the density of an iron block that weighs 5 Newtons and has a volume of 200 cm³?
What is the density of an iron block that weighs 5 Newtons and has a volume of 200 cm³?
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Determine the air-standard efficiency of an engine operating on the diesel cycle with a clearance of 6% and suction pressure of 99.87 kPa.
Determine the air-standard efficiency of an engine operating on the diesel cycle with a clearance of 6% and suction pressure of 99.87 kPa.
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For an Otto cycle with a compression ratio of 8, what is the calculated pressure during compression?
For an Otto cycle with a compression ratio of 8, what is the calculated pressure during compression?
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In a Carnot cycle connected in series, what is the work output of cycle C if heat added to cycle A is 1000 kW?
In a Carnot cycle connected in series, what is the work output of cycle C if heat added to cycle A is 1000 kW?
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What is the mass of water vapor contained in a 150m³ room at 100 kPa, 23°C and 40% relative humidity?
What is the mass of water vapor contained in a 150m³ room at 100 kPa, 23°C and 40% relative humidity?
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If air is compressed adiabatically from 30°C to 100°C and the mass of air is 5 kg, what is the change in entropy?
If air is compressed adiabatically from 30°C to 100°C and the mass of air is 5 kg, what is the change in entropy?
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How many hours will the available coal run the boilers if one boiler produces 1591 kg of steam per hour and the other produces 1364 kg?
How many hours will the available coal run the boilers if one boiler produces 1591 kg of steam per hour and the other produces 1364 kg?
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What is the efficiency of the boiler if the heating value of the fuel is 40,000 kJ/kg and the factor of evaporation is 1.10?
What is the efficiency of the boiler if the heating value of the fuel is 40,000 kJ/kg and the factor of evaporation is 1.10?
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What is the rate of evaporation for a water tube boiler with a factor of evaporation of 1.10 and a heating surface area of 250 m²?
What is the rate of evaporation for a water tube boiler with a factor of evaporation of 1.10 and a heating surface area of 250 m²?
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What is the particulate discharged per million BTU of heat input to the furnace based on the given data?
What is the particulate discharged per million BTU of heat input to the furnace based on the given data?
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How high should the chimney be if the gas density is 0.75 kg/m³ and the driving pressure is 0.25 kPa?
How high should the chimney be if the gas density is 0.75 kg/m³ and the driving pressure is 0.25 kPa?
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What is the total number of hours to consume the available fuel based on a boiler capacity of 1000 kg/hr?
What is the total number of hours to consume the available fuel based on a boiler capacity of 1000 kg/hr?
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What is the specific evaporation if the factor of evaporation is 1.10 and the actual evaporation is known to be 10?
What is the specific evaporation if the factor of evaporation is 1.10 and the actual evaporation is known to be 10?
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What is the net power produced by the ideal standard Brayton cycle described, given the conditions stated?
What is the net power produced by the ideal standard Brayton cycle described, given the conditions stated?
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What is the overall efficiency of a 12 MW geothermal power plant with steam entering the turbine at the given mass flow and quality?
What is the overall efficiency of a 12 MW geothermal power plant with steam entering the turbine at the given mass flow and quality?
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How many wells are required for a 16,000 KW geothermal plant with specified efficiencies and quality after throttling?
How many wells are required for a 16,000 KW geothermal plant with specified efficiencies and quality after throttling?
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What is the calculated penstock diameter for a Pelton type turbine given the head and friction loss data?
What is the calculated penstock diameter for a Pelton type turbine given the head and friction loss data?
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What is the secondary power that a 9,000 KW hydro-electric plant could deliver upon receiving 110,000 KW-hrs for that day?
What is the secondary power that a 9,000 KW hydro-electric plant could deliver upon receiving 110,000 KW-hrs for that day?
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What is the power output in KW from a Pelton type turbine installed below a gate with certain friction loss?
What is the power output in KW from a Pelton type turbine installed below a gate with certain friction loss?
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How many identical turbines operating at 139.0 rpm with specified efficiency and flow are needed for a head of 1200 ft?
How many identical turbines operating at 139.0 rpm with specified efficiency and flow are needed for a head of 1200 ft?
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What is the diameter of the chimney for gas entering at 8 m/sec with a mass of 50,000 kg/hr?
What is the diameter of the chimney for gas entering at 8 m/sec with a mass of 50,000 kg/hr?
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Determine the diameter of a chimney for a coal-fired steam boiler using 3000 kg of coal per hour.
Determine the diameter of a chimney for a coal-fired steam boiler using 3000 kg of coal per hour.
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What is the appropriate diameter for a stack with flue gases entering at a rate of 5.0 kg/sec and a driving pressure of 0.20 kPa?
What is the appropriate diameter for a stack with flue gases entering at a rate of 5.0 kg/sec and a driving pressure of 0.20 kPa?
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Calculate the intercooler pressure between the first and second stage of a 10-stage air compressor compressing from 100 kPa to 800 kPa.
Calculate the intercooler pressure between the first and second stage of a 10-stage air compressor compressing from 100 kPa to 800 kPa.
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What is the intercooler pressure between the second and third stage in a 3-stage air compressor compressing from 100 kPa to 700 kPa?
What is the intercooler pressure between the second and third stage in a 3-stage air compressor compressing from 100 kPa to 700 kPa?
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What is the suction pressure if the discharge pressure of an air compressor is 5 times the suction pressure and the work is 19.57 kW?
What is the suction pressure if the discharge pressure of an air compressor is 5 times the suction pressure and the work is 19.57 kW?
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What is the cost of the fuel to produce one KW-hr for a diesel electric plant that consumed 240 gallons and produced 3930 KW-hr?
What is the cost of the fuel to produce one KW-hr for a diesel electric plant that consumed 240 gallons and produced 3930 KW-hr?
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How much air is consumed by a turbo-charged, 16-cylinder, Vee-type diesel engine at rated load and speed?
How much air is consumed by a turbo-charged, 16-cylinder, Vee-type diesel engine at rated load and speed?
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In a cascade refrigeration cycle, what is the typical temperature threshold for cooling objects?
In a cascade refrigeration cycle, what is the typical temperature threshold for cooling objects?
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Which type of refrigerant control is specifically designed to maintain a pressure difference while the compressor operates?
Which type of refrigerant control is specifically designed to maintain a pressure difference while the compressor operates?
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What is the approximate percentage reduction in compressor power consumption for every 3C drop in inlet air temperature?
What is the approximate percentage reduction in compressor power consumption for every 3C drop in inlet air temperature?
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What modern method is utilized to detect air compressor leaks?
What modern method is utilized to detect air compressor leaks?
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For foundation of stacks, the maximum pressure on the soil is derived from the weight and what additional factor?
For foundation of stacks, the maximum pressure on the soil is derived from the weight and what additional factor?
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When considering multistage compression in an ideal Brayton cycle, how does the back work ratio typically behave?
When considering multistage compression in an ideal Brayton cycle, how does the back work ratio typically behave?
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What is the atmospheric pressure if a vacuum pump can lift water at a temperature of 20℃ and pressure of 2.34 KPa?
What is the atmospheric pressure if a vacuum pump can lift water at a temperature of 20℃ and pressure of 2.34 KPa?
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When installing a foundation bolt for an engine, the inside diameter of the surrounding pipe sleeve should be at least how many times the diameter of the anchor bolt?
When installing a foundation bolt for an engine, the inside diameter of the surrounding pipe sleeve should be at least how many times the diameter of the anchor bolt?
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What is the diameter of the impeller of the pump if each impeller diameter developed a head of 38 ft?
What is the diameter of the impeller of the pump if each impeller diameter developed a head of 38 ft?
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What is the horsepower of the engine when it is making 300 rpm with an average pressure of 120 psi?
What is the horsepower of the engine when it is making 300 rpm with an average pressure of 120 psi?
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How much work is done if the heat transferred out of the system is 150 kJ/kg and internal energy decreases by 400 kJ/kg?
How much work is done if the heat transferred out of the system is 150 kJ/kg and internal energy decreases by 400 kJ/kg?
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What is the power produced by an engine with a thermal efficiency of 50% and heat transferred at a rate of $10^6$ kJ/hr?
What is the power produced by an engine with a thermal efficiency of 50% and heat transferred at a rate of $10^6$ kJ/hr?
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How many calories are absorbed each second by the boiler if the steam engine delivers 8 Hp and operates at 30% efficiency of a Carnot engine?
How many calories are absorbed each second by the boiler if the steam engine delivers 8 Hp and operates at 30% efficiency of a Carnot engine?
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What is the indicated mean effective pressure of an engine with a brake mean effective pressure of 750 kPa and 80% mechanical efficiency?
What is the indicated mean effective pressure of an engine with a brake mean effective pressure of 750 kPa and 80% mechanical efficiency?
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Determine the diameter of the stud bolt required to fasten down the cylinder head of a 203 mm x 304 mm gas engine, given the explosion pressure of 31 kg/sq.cm.
Determine the diameter of the stud bolt required to fasten down the cylinder head of a 203 mm x 304 mm gas engine, given the explosion pressure of 31 kg/sq.cm.
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What is the pitch of a single threaded trapezoidal metric thread used as a translation screw?
What is the pitch of a single threaded trapezoidal metric thread used as a translation screw?
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Study Notes
Thermodynamics 1
- Pressure and Volume Relationship (Constant Temperature): If pressure triples at constant temperature, volume reduces to one-third its original value.
- Pressure Conversion: 750 mmHg equals approximately 100 KN/m².
- Temperature Conversion: 620°R equals approximately 71.11°C.
- Gas Volume Calculation: Unknown volume can be determined if volume, pressure and temperature are known, and the initial container is allowed to expand to another container.
- Density Calculation: The density of an iron block weighing 5 Newton and having a volume of 200 cm³ is approximately 2549 kg/m³.
Thermodynamics 2
- Diesel Cycle Efficiency: Air-standard efficiency of a diesel engine with 6% clearance, operating at 99.87 kPa suction pressure, with 7% stroke fuel injection, and k = 1.4 is approximately 62.11%.
- Otto Cycle Compression Ratio: An otto cycle with a compression ratio of 8 will have a different compression pressure.
- Carnot Cycle Work Output: A Carnot cycle with a 1000 kW heat input to the first part of the series will have a different work output depending on the operation.
- Adiabatic Air Compression: A change in entropy is calculated during an adiabatic compression of air from 30°C to 100°C for 5 kg of air.
- Internal Energy Change (Tank): A decrease in internal energy calculation is given.
- Heat Transfer: Stefan-Boltzmann constant is discussed for power/unit area.
- Heat Loss Calculation: Heat loss per hour through 1 sq ft of 18-inch thick furnace wall, given inside wall temp and thermal conductivity, can be calculated.
- Water Temperature Change: Calculations for heat exchanger with 55,000 gallons of water are given.
Heat Transfer
- Heat Transfer Operations: Common operations using the power/unit area Stefan-Boltzmann constant for a black body radiation are given in the text.
- Wall Temperature Calculation: Calculation is available for the outside surface temperature of a wall given its heat loss per hour through 1 sq ft.
- Water Temperature Calculation: An example calculation for the entrance water temperature of 55,000 gallons of water through a heat exchanger at a given exit temperature is given.
Combustion
- Fuel Consumption and Storage: Calculations involving a cylindrical fuel storage tank are shown.
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Description
Test your knowledge on key concepts in thermodynamics, including pressure and volume relationships, temperature conversions, and cycle efficiencies. This quiz covers essential principles such as the Diesel and Otto cycles, along with various calculations related to gas laws and densities.
