The product of efficiency & heat transferred to the working fluid is? a. Net temperature change b. Net work done c. Net enthalpy change d. None of the mentioned

The product of efficiency & heat transferred to the working fluid is?
a. Net temperature change
b. Net work done
c. Net enthalpy change
d. None of the mentioned
by

1 Answer

Answer :

b. Net work done
by

Related questions

Fire tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy

Description : Fire tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy

Last Answer : a) Flue gases pass through tubes and water around it

Water tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy

Description : Water tube boilers are those in which a) Flue gases pass through tubes and water around it b) Water passes through the tubes and flue gases around it c) Work is done during adiabatic expansion d) Change is enthalpy

Last Answer : b) Water passes through the tubes and flue gases around it

The generated heat is transferred to water to make ______ the process of boiling. • Steam • Boiler • Both • None

Description : The generated heat is transferred to water to make ______ the process of boiling. • Steam • Boiler • Both • None

Last Answer : • Steam

The economiser is used in boilers to........ A]Increase thermal efficiency of boiler B]Economise on fuel C]Extract heat from the exhaust the gases D]Increase flue gas temperature

Description : The economiser is used in boilers to........ A]Increase thermal efficiency of boiler B]Economise on fuel C]Extract heat from the exhaust the gases D]Increase flue gas temperature

Last Answer : A]Increase thermal efficiency of boiler

Boiler efficiency is a measure of how effectively _______ energy in fuel is converted into heat energy in steam going to the turbines A Chemical energy B Heat energy C Thermal energy D All of the above

Description : Boiler efficiency is a measure of how effectively _______ energy in fuel is converted into heat energy in steam going to the turbines A Chemical energy B Heat energy C Thermal energy D All of the above

Last Answer : A Chemical energy

The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be (A) 0.4 (B) 0.56 (C) 0.67 (D) 1.67

Description : The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be (A) 0.4 (B) 0.56 (C) 0.67 (D) 1.67

Last Answer : (A) 0.4

When vapour is cooled at constant total system volume, the _______ changes. A] Volume. B] Pressure C] Temperature. D] None of the mentioned

Description : When vapour is cooled at constant total system volume, the _______ changes. A] Volume. B] Pressure C] Temperature. D] None of the mentioned

Last Answer : B] Pressure

When gas changes to liquid through the process of condensation, the temperature A] Increases. B] Decreases C] Remains constant. D] None of the mentioned

Description : When gas changes to liquid through the process of condensation, the temperature A] Increases. B] Decreases C] Remains constant. D] None of the mentioned

Last Answer : C] Remains constant.

When vapour is compressed isothermally the ____________ changes. A] Volume. B] Pressure C] Temperature D] None of the mentioned

Description : When vapour is compressed isothermally the ____________ changes. A] Volume. B] Pressure C] Temperature D] None of the mentioned

Last Answer : A] Volume.

Rankine cycle efficiency in a good steam power station may be in the range between........ a.15% - 20% b.35% - 40% c.50% - 60% d.90% - 95%

Description : Rankine cycle efficiency in a good steam power station may be in the range between........ a.15% - 20% b.35% - 40% c.50% - 60% d.90% - 95%

Last Answer : b.35% - 40%

Why single boiler unit per turbine is equipped commonly? • For better turbine control • To reduce the cost • For overcoming losses of power • To improve the efficiency

Description : Why single boiler unit per turbine is equipped commonly? • For better turbine control • To reduce the cost • For overcoming losses of power • To improve the efficiency

Last Answer : • For better turbine control

The efficiency of the plant _____ with the mechanical draught a) Increases b) Decreases c) Remain constant d) None of the above

Description : The efficiency of the plant _____ with the mechanical draught a) Increases b) Decreases c) Remain constant d) None of the above

Last Answer : a) Increases

The heat produced in this system is then rejected into the system as _______ a. Steam b. Boiler c. Both a & b d. None

Description : The heat produced in this system is then rejected into the system as _______ a. Steam b. Boiler c. Both a & b d. None

Last Answer : a. Steam

According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  (c) internal energy, enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Description : According to first law of thermodynamics  (a) work done by a system is equal to heat transferred by the system  (b) total internal energy of a system during a process remains constant  ( ... , enthalpy and entropy during a process remain constant  (d) total energy of a system remains constant

Last Answer : Answer : d

Adiabatic process is (A) Essentially an isentropic process is___________ (B) Non-heat transfer process (C) Reversible process (D) Constant temperature process

Description : Adiabatic process is (A) Essentially an isentropic process is___________ (B) Non-heat transfer process (C) Reversible process (D) Constant temperature process

Last Answer : (B) Non-heat transfer process

Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Description : Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant  (a) pressure  (b) temperature  (c) volume  (d) internal energy  (e) entropy.

Last Answer : Answer : a

Condensation starts ________ point. A] Dew point B] Bubble point C] Triple point D] None of the mentioned

Description : Condensation starts ________ point. A] Dew point B] Bubble point C] Triple point D] None of the mentioned

Last Answer : A] Dew point

Direct relation between…….. &………of saturated steam, the amount of energy input to process easy to control. a) volume, pressure b) volume, temperature c) temperature, pressure d) None of above

Description : Direct relation between…….. &………of saturated steam, the amount of energy input to process easy to control. a) volume, pressure b) volume, temperature c) temperature, pressure d) None of above

Last Answer : c) temperature, pressure

What is the main disadvantage of Lamont boiler ? a. Less flexible in design b. Low heat transfer rate c. Formation of bubbles d. Low steam generation capacity

Description : What is the main disadvantage of Lamont boiler ? a. Less flexible in design b. Low heat transfer rate c. Formation of bubbles d. Low steam generation capacity

Last Answer : c. Formation of bubbles

Combustion of which fuels from following is source of heat for boiler 1. Wood 2. Coal 3. Oil 4. All of above

Description : Combustion of which fuels from following is source of heat for boiler 1. Wood 2. Coal 3. Oil 4. All of above

Last Answer : 4. All of above

The relative heat absorption for successively added equal areas of boiler convection heating surfaces__________ (A) Increases (B) Decreases (C) Remain unaffected (D) First increases and then decreases

Description : The relative heat absorption for successively added equal areas of boiler convection heating surfaces__________ (A) Increases (B) Decreases (C) Remain unaffected (D) First increases and then decreases

Last Answer : (B) Decreases

A boiler or steam generator is a device used to create steam by applying heat energy to _____. • Water • Petrol • Oil • All of the above

Description : A boiler or steam generator is a device used to create steam by applying heat energy to _____. • Water • Petrol • Oil • All of the above

Last Answer : • Water

……… is excellent carrier of heat a) Water b) steam c) solid d) None of above

Description : ……… is excellent carrier of heat a) Water b) steam c) solid d) None of above

Last Answer : b) steam

The following is the correct order of energy conversion in thermal power plants a. Chemical energy – Mechanical energy – Electrical energy b. Mechanical energy – Chemical energy – Electrical energy c. Wind energy – Mechanical energy – Electrical energy d. Heat energy – Electrical energy – Mechanical energy.

Description : The following is the correct order of energy conversion in thermal power plants a. Chemical energy - Mechanical energy - Electrical energy b. Mechanical energy - Chemical energy - Electrical energy c ... - Mechanical energy - Electrical energy d. Heat energy - Electrical energy - Mechanical energy.

Last Answer : a. Chemical energy – Mechanical energy – Electrical energy

What kind of energy output is obtained from a ‘Steam Power Plant’? a. Heat energy b. Sound energy c. Electricity d. Thermal energy

Description : What kind of energy output is obtained from a ‘Steam Power Plant’? a. Heat energy b. Sound energy c. Electricity d. Thermal energy

Last Answer : c. Electricity

Basic Parts of a Boiler. Burner, • the combustion chamber, • the heat exchanger • All of the above

Description : Basic Parts of a Boiler. Burner, • the combustion chamber, • the heat exchanger • All of the above

Last Answer : • All of the above

A _______ incorporates a firebox or furnace in order to burn the fuel and generate heat. • Steam • Boiler • Hydrogen • None

Description : A _______ incorporates a firebox or furnace in order to burn the fuel and generate heat. • Steam • Boiler • Hydrogen • None

Last Answer : • Boiler

A boiler is an enclosed vessel that provides a means for ________ and ______ heat to water until it becomes hot water or steam. a. Generate, boiler b. Condenser, loop c. Combustion, transfers d. All of above

Description : A boiler is an enclosed vessel that provides a means for ________ and ______ heat to water until it becomes hot water or steam. a. Generate, boiler b. Condenser, loop c. Combustion, transfers d. All of above

Last Answer : c. Combustion, transfers

A -________ incorporates a firebox or furnace in order to burn the fuel and _________ heat. a. Boiler, generate b. Heat, boiler c. Steam, pressure d. None

Description : A -________ incorporates a firebox or furnace in order to burn the fuel and _________ heat. a. Boiler, generate b. Heat, boiler c. Steam, pressure d. None

Last Answer : a. Boiler, generate

A __________ is a type of heat exchange system where water is heated to its' boiling point via combustion of a fuel blown through a tube submerged in water. a. Condensate loop b. Hyperbolic cooling tower c. Steam boiler d. All of above

Description : A __________ is a type of heat exchange system where water is heated to its' boiling point via combustion of a fuel blown through a tube submerged in water. a. Condensate loop b. Hyperbolic cooling tower c. Steam boiler d. All of above

Last Answer : c. Steam boiler

What is the main component in a boiler a) steam b) heat c) pressure condenser d) combination

Description : What is the main component in a boiler a) steam b) heat c) pressure condenser d) combination

Last Answer : a) steam

The heat in the boiler is used for making ______ a) steam b) condensing process c) ice d) none of these

Description : The heat in the boiler is used for making ______ a) steam b) condensing process c) ice d) none of these

Last Answer : a) steam

A _______ incorporates a firebox or furnace in order to burn the fuel and generate heat. A Steam B Boiler C Hydrogen D None

Description : A _______ incorporates a firebox or furnace in order to burn the fuel and generate heat. A Steam B Boiler C Hydrogen D None

Last Answer : B Boiler

For caring the heat efficiently the steam must be__________ a) dry b) wet c) saturated d) none of above

Description : For caring the heat efficiently the steam must be__________ a) dry b) wet c) saturated d) none of above

Last Answer : c) saturated

_________is the most widely used media in distribution of heat over distance in industries a) Steam b) light c) Springs c) water

Description : _________is the most widely used media in distribution of heat over distance in industries a) Steam b) light c) Springs c) water

Last Answer : a) Steam

A boiler is a device used to create steam by applying __________to water a) Light energy b) heat energy c) Wind energy d) mechanical energy

Description : A boiler is a device used to create steam by applying __________to water a) Light energy b) heat energy c) Wind energy d) mechanical energy

Last Answer : b) heat energy

Based on the exhaust gas analysis, a controller maintains stoichiometric combustion __ a. by commanding a servo motor to adjust the combustion air damper b. By commanding servo motor to adjust the fuel supply valve. c. Both a. & b. d. None of the above.

Description : Based on the exhaust gas analysis, a controller maintains stoichiometric combustion __ a. by commanding a servo motor to adjust the combustion air damper b. By commanding servo motor to adjust the fuel supply valve. c. Both a. & b. d. None of the above.

Last Answer : c. Both a. & b.

Detecting and monitoring carbon monoxide assures the air/fuel ratio is not too rich as a. The excess air is trimmed b. Excess air is let out c. Both a. & b. d. None of above

Description : Detecting and monitoring carbon monoxide assures the air/fuel ratio is not too rich as a. The excess air is trimmed b. Excess air is let out c. Both a. & b. d. None of above

Last Answer : a. The excess air is trimmed

It is easy to detect and monitor excess air a. As oxygen not used for combustion is heated and discharged with the exhaust gases. b. Oxygen is discharged without heating c. Both a. & b. d. None of above

Description : It is easy to detect and monitor excess air a. As oxygen not used for combustion is heated and discharged with the exhaust gases. b. Oxygen is discharged without heating c. Both a. & b. d. None of above

Last Answer : a. As oxygen not used for combustion is heated and discharged with the exhaust gases.

For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Description : For process boilers , combustion air fans must meet the following requirements ___ a. The fan motor shall be driven by a variable speed drive b. The fan motor shall include controls that limit the fan motor demand to no more than 30 %. c. Both a. & b. d. None of the above

Last Answer : c. Both a. & b.

A flue damper and a vent damper are two examples of _______ a. Combustion air positive shut off devices b. Combustion air negative shut off devices c. Both a. & b. d. None of the above

Description : A flue damper and a vent damper are two examples of _______ a. Combustion air positive shut off devices b. Combustion air negative shut off devices c. Both a. & b. d. None of the above

Last Answer : a. Combustion air positive shut off devices

when steam is condensate volume is drastically……. a) reduces b) increase c) both a) & b) d) None of above

Description : when steam is condensate volume is drastically……. a) reduces b) increase c) both a) & b) d) None of above

Last Answer : a) reduces

If the water level inside the boiler were not carefully control cased… a) explosion b) overheat and fail c) both a) & b) d) None of above

Description : If the water level inside the boiler were not carefully control cased… a) explosion b) overheat and fail c) both a) & b) d) None of above

Last Answer : c) both a) & b)

Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls

Description : Find false statement about effect of sulphur in fuel? (A) It has heating value (B) It helps in electrostatic precipitation of ash in flue gases (C) It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low (D) It erodes furnace walls

Last Answer : (D) It erodes furnace walls

When the bubbles of steam are produced? • Once the water reaches saturation temperature • Once the water starts evaporating • Once the temperature decreases • None of the above

Description : When the bubbles of steam are produced? • Once the water reaches saturation temperature • Once the water starts evaporating • Once the temperature decreases • None of the above

Last Answer : • Once the water reaches saturation temperature

Feed water usually at…… °C temperature. a) 70 b) 120 c) 1000 d) 80

Description : Feed water usually at…… °C temperature. a) 70 b) 120 c) 1000 d) 80

Last Answer : d) 80

What is the temperature at which the steam boiler are capable to withstand • 200°C • 280°C • 540°C • 358°C

Description : What is the temperature at which the steam boiler are capable to withstand • 200°C • 280°C • 540°C • 358°C

Last Answer : • 540°C

What is the temperature at which the steam boiler are Capable to withstand a. 200°C b. 280°C c. 540°C d. 358°C

Description : What is the temperature at which the steam boiler are Capable to withstand a. 200°C b. 280°C c. 540°C d. 358°C

Last Answer : c. 540°C

What happens when air dissolves in condensate? a) non corrosive b) temperature of air increases c) corrosive d) none of above

Description : What happens when air dissolves in condensate? a) non corrosive b) temperature of air increases c) corrosive d) none of above

Last Answer : c) corrosive

The temperature and pressure in saturated stem has__________relationship a) Direct b) indirect c) Neither of above d) both a and b

Description : The temperature and pressure in saturated stem has__________relationship a) Direct b) indirect c) Neither of above d) both a and b

Last Answer : b) indirect