Recent questions tagged power-plant

During which of following process does heat rejection take place in Carnot vapour cycle? [IES-1992] (a) Constant volume (b) constant pressure (c) Constant temperature (d) constant entropy

Description : During which of following process does heat rejection take place in Carnot vapour cycle? [IES-1992] (a) Constant volume (b) constant pressure (c) Constant temperature (d) constant entropy

Last Answer : (c) Constant temperature

In a Rankine cycle, with the maximum steam temperature being fixed from metallurgical considerations, as the boiler pressure increases (a) The condenser load will increase [IES-1997] (b) The quality of turbine exhaust will decrease (c) The quality of turbine exhaust will increase (d) The quality of turbine exhaust will remain unchanged

Description : In a Rankine cycle, with the maximum steam temperature being fixed from metallurgical considerations, as the boiler pressure increases (a) The condenser load will increase [IES-1997] (b) The ... The quality of turbine exhaust will increase (d) The quality of turbine exhaust will remain unchanged

Last Answer : (b) The quality of turbine exhaust will decrease 

Consider the following processes: [IES-1999] 1. Constant pressure heat addition. 2. Adiabatic compression. 3. Adiabatic expansion. 4. Constant pressure heat rejection. The correct sequence of these processes in Rankine cycle is: (a) 1, 2, 3, 4 (b) 2, 1, 4, 3 (c) 2, 1, 3, 4 (d) 1, 2, 4, 3

Description : Consider the following processes: [IES-1999] 1. Constant pressure heat addition. 2. Adiabatic compression. 3. Adiabatic expansion. 4. Constant pressure heat rejection. The correct sequence of these processes in Rankine cycle is: (a) 1, 2, 3, 4 (b) 2, 1, 4, 3 (c) 2, 1, 3, 4 (d) 1, 2, 4, 3

Last Answer : (c) 2, 1, 3, 4 

In steam and other vapour cycles, the process of removing noncondensable is called [GATE-1992] (a) Scavenging process (b) Deaeration process (c) Exhaust process (d) Condensation process

Description : In steam and other vapour cycles, the process of removing noncondensable is called [GATE-1992] (a) Scavenging process (b) Deaeration process (c) Exhaust process (d) Condensation process  

Last Answer : (b) Deaeration process  

For a given set of operating pressure limits of a Rankine cycle, the highest, efficiency occurs for [GATE-1994] (a) Saturated cycle (b) Superheated cycle (c) Reheat cycle (d) Regenerative cycle.

Description : For a given set of operating pressure limits of a Rankine cycle, the highest, efficiency occurs for [GATE-1994] (a) Saturated cycle (b) Superheated cycle (c) Reheat cycle (d) Regenerative cycle. 

Last Answer : (d) Regenerative cycle. 

In a Rankine cycle, regeneration results in higher efficiency because (a) Pressure inside the boiler increases [GATE-2003] (b) Heat is added before steam enters the low pressure turbine (c) Average temperature of heat addition in the boiler increases (d) Total work delivered by the turbine increases

Description : In a Rankine cycle, regeneration results in higher efficiency because (a) Pressure inside the boiler increases [GATE-2003] (b) Heat is added before steam enters the low pressure turbine (c) ... temperature of heat addition in the boiler increases (d) Total work delivered by the turbine increases 

Last Answer : (c) Average temperature of heat addition in the boiler increases  

The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because [GATE-2002] (a) The enthalpy of main steam is higher for superheat cycle (b) The mean temperature of heat addition is higher for superheat cycle (c) The temperature of steam in the condenser is high (d) The quality of stem in the condenser is low

Description : The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because [GATE-2002] (a) The enthalpy of main steam is higher for superheat cycle (b) The mean temperature of heat ... temperature of steam in the condenser is high (d) The quality of stem in the condenser is low 

Last Answer :  (b) The mean temperature of heat addition is higher for superheat cycle  

The correct sequence of factors in order of deceasing importance for location of a thermal power plant is [IAS-2001] (a) load, coal, water (b) coal, water, load (c) Water, load, coal (d) water, coal, load

Description : The correct sequence of factors in order of deceasing importance for location of a thermal power plant is [IAS-2001] (a) load, coal, water (b) coal, water, load (c) Water, load, coal (d) water, coal, load

Last Answer : (b) coal, water, load 

In thermal power plants, coal is transferred from bunker to the other places by [IES-1992] (a) Hoists (b) conveyors (c) cranes (d) lifts

Description : In thermal power plants, coal is transferred from bunker to the other places by [IES-1992] (a) Hoists (b) conveyors (c) cranes (d) lifts 

Last Answer : (b) conveyors

A thermoelectric engine which consists of two dissimilar electric conductors connected at two junctions maintained at different temperatures, converts (a) Electric energy into heat energy [IES-2006] (b) Heat energy into electric energy (c) Mechanical work into electric energy (d) Electric energy into mechanical work

Description : A thermoelectric engine which consists of two dissimilar electric conductors connected at two junctions maintained at different temperatures, converts (a) Electric energy into heat energy [IES-2006] (b ... energy (c) Mechanical work into electric energy (d) Electric energy into mechanical work  

Last Answer : (b) Heat energy into electric energy  

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