Objective Questions- Gas Turbine Power Plant and Renewable Energy Sources

Gas Turbine Power Plant

 

Brayton cycle is used in ..........

A. SI engine                       B. CI engine                       C. Ram jet engine                            D. Gas turbine 

Which of the following is a types of gas turbine power plant ?

A. Open               B. Single acting                C. Double acting              D. None of these 

 

Brayton cycle is also called as ..........

A. Otto cycle                      B. Joule cycle                    C. Diesel cycle                   D. Carnot cycle 

 

Which cycle is air standard cycle for a gas turbine?

A. Brayton cycle               B. Otto cycle                      C. Carnot cycle                  D. Reheat cycle 

 

Brayton cycle is consist of ..........

A. Two constant volume process and two constant pressure process 

B. Two constant pressure process and two isentropic process 

C. Two isobaric process and two isentropic process 

D. Two isothermal process and two constant volume process. 

 

Gas turbine is a .............. types of combustion chamber. 

A. Internal                         B. External                        C. Open               D. None of these 

 

When Reheating in gas turbine then ...........

A. Decreased compressor work                                 B. Increased compressor work

C. Decreased gas turbine work                                  D. Increased gas turbine work

 

Efficiency of gas turbine is increased by using........

A. Inter cooling                B. Reheating                     C. Adding a generator                    D. All of above 

Which fuel mainly used in gas turbine power plant. 

A. Gas oil             B. Coal and peat               C. Natural gas & liquid petroleum fuel     D. Kerosene oil

 

Which is main component in gas turbine plant ?

A. Boiler              B. Condenser                    C. Compressor                  D. Nozzle

 

 

RENEWABLE ENERGY SOURCES

1. The function of a solar collector is to convert.......

   A.Solar Energy into Electricity                                  B.Solar Energy radiation

   C.Solar Energy thermal energy                                 D.Solar Energy mechanical energy

2. Most of the solar radiation received on earth surface lies within the range of........

   A.0.2 to 0.4 microns                      B.0.38 to 0.78 microns

   C.0 to 0.38 microns                       D.0.5 to 0.8 microns

3. For satellite the source of energy is........

   A.Cryogenic storage                       B.Battery

   C.Solar cell                                       D.Any of the above

 

4. Reflecting mirrors used for exploiting solar energy are called........

   A.Mantle             B.Ponds               C.Diffusers                        D.Heliostats

 

5. The output of solar cell is of the order of........

   A.1 W                   B.5 W                   C.10 W                 D.20 W

 

6. Flat plate collector absorbs.......

   A.Direct radiation only                 B.Diffuse radiation only

   C.Direct and diffuse both             D.All of the above

7. A pyranometer is used for mesurement of........

   A.Direct radiation only                                B.Diffuse radiation only

   C.Direct as well as diffuse radiation         D.All of the above

8. Most widely used solar material is........

   A.Arsenic            B.Cadmium                      C.Silicon             D.Steel

 

9. Photovoltaic cell or solar cell converts........

   A.Thermal energy into electricity                             B.Electromagnetic radiation directly into electricity

   C.Solar radiation into thermal energy                     D.Solar radiation into kinetic energy

10.Temperature attained by a flat-plate collector is of the........

   A.Order of about 90⁰C                  B.Range of 100⁰C to 150⁰C

   C.Above 150⁰C                                 D.None of the above

 

11. What does Heating and cooling of the atmosphere generates?
a) Thermo line circulation           b) Radiation currents
c) Convection currents                  d) Conduction currents

12. How much is the energy available in the winds over the earth surface is estimated to be?
a) 2.9 X 120 MW              b) 1.6 X 107 MW              c) 1 MW               d) 5MW
  

13. How much wind power does India hold?
a) 20,000 MW                 b) 12,000 MW                  c) 140,000 MW                d) 5000 MW
  

14. What is the main source for the formation of wind?
a) Uneven land                 b) Sun                  c) Vegetation                    d) Seasons
  

15. Which country created wind mills?
a) Egypt              b) Mongolia                      c) Iran                 d) Japan
  

16. When did the development of wind power in India began?
a) 1965                b) 1954                c) 1990                d) 1985

17. What happens when the land near the earth’s equator is heated?
a) All the oceans gets heated up                 b) Small wind currents are formed
c) Rise in tides                                                d) Large atmospheric winds are created
 

18. What type of energy is wind energy?
a) Renewable energy                     b) Non-renewable energy
c) Conventional energy                 d) Commercial energy
  

19. What are used to turn wind energy into electrical energy?
a) Turbine          b) Generators                   c) Yaw motor                    d) Blades
  

20. What is the diameter of wind turbine blades?
a) 320 feet          b) 220 feet          c) 80 feet             d) 500 feet

 

Composed By:      

 R.Satheesh, M.E., Asso.Prof.,

E-Mail:  rsatheeshemail@gmail.com

Objective Questions- Diesel Power Plant and Hydroelectric Power Plant

 

Diesel Power Plant

What is supercharging?
a. Pumping of air into the cylinder at the pressure greater than atmospheric pressure.
b. Pumping of air out of the cylinder at the pressure greater than atmospheric pressure.
c. Pumping of air into the cylinder at the pressure lower than atmospheric pressure.
d. Pumping of air out of the cylinder at the pressure lower than atmospheric pressure.

Calculate the overall efficiency of the diesel plant if the fuel consumption is 0.24 kg per kWh and the calorific value of the fuel being 10000 kcal/kg.
a. 30.78               b. 35.83               c. 28.73               d. 36.86

The lubrication cost in a diesel power plant is
a. High                b. Low                  c. Moderate                       d. Very low.

The identification of a two stroke engine is given by
a. Cooling system.            b. Lubrication system.                   c. Absence of valve.         d. All of these.

Maximum temperature developed in a diesel engine is in the range of
a. 2000 - 2500 °C            b. 500 – 1000 °C              c. 1500 – 2000 °C            d. 1000 – 1500 °C

High output diesel engines are started by
a. Self starter.                   b. Compressed air.          c. Battery.           d. Cranking.

Heating value of diesel is around?
a. 4000 kcal/kg                b. 10000 kcal/kg             c. 15000 kcal/kg              d. 20000 kcal/kg

The temperature of the cooling water leaving the diesel engine should not exceed.
a. 25 °C                b. 40 °C               c. 85 °C                d. 70 °C

Hydroelectric Power Plant

1. Which of the following is the correct equation for the electrical power generated by the hydroelectric power plant?
a) 75×0.736 wQHη Watt              b) (7.5/0.736) × wQHη Watt
c) 0.845 ×wQHη Watt                  d) 9.81 ×wQHη

2. Which of the following is not a requirement for site selection of hydroelectric power plant?
a) Availability of water                  b) Large catchment area
c) Rocky land                                   d) Sedimentation

3. The amount of electrical energy that can be generated by a hydroelectric power plant depends upon ___________
a) Head of water                             b) Quantity of water
c) Specific weight of water           d) Efficiency of Alternator

4. Which of the following statement is true about hydroelectric power plant?
a) Hydroelectric power plants are multipurpose.
b) Due to non-uniform flow of water frequency control in such plants is very difficult.
c) Hydroelectric power plant has high running cost
d) Water is used as fuel in hydroelectric power plant

5. Hydroelectric power plant is __________
a) Non-renewable source of energy                          b) Conventional source of energy
c) Non-conventional source of energy                     d) Continuous source of energy

6.  Which of the following is not an advantage of hydroelectric power plant?
a) no fuel requirement                                                b) low running cost
c) continuous power source                                       d) no standby losses

7. Hydroelectric power plant is mainly located in ____________
a) Flat areas                      b) Deserts           c) Hilly areas                     d) Deltas

8. Which statement about hydroelectric power plant is wrong?
a) Efficiency of hydroelectric power plant does not reduce with age
b) Its construction coast is very high and takes a long time for erection.
c) It is very neat and clean plant because no smoke or ash is produced.
d) Meeting rapidly changing load demands is not possible in hydroelectric power plant.
 

 

 

Composed By:      

 R.Satheesh, M.E., Asso.Prof.,

E-Mail:  rsatheeshemail@gmail.com

TE LAB-PENSKY MARTEN CLOSED CUP APPARATUS

Ex.No:                                                                                                                                     Date:

 

DETERMINATION OF FLASH AND FIRE POINT OF OIL BY PENSKY MARTEN

CLOSED CUP APPARATUS

Aim:

To determine flash and fire point of a given sample of oil by using Pensky Marten closed cup apparatus.

 

Apparatus Required:

• Pensky Marten closed cup apparatus

• Oil sample

• Thermometer

 

Principle:

Flash point is the lowest temperature at which the lubricating oil gives off enough vapors that ignite for a moment when tiny flame is brought near it.

Fire point is the lowest temperature at which the vapors of the oil burn continuously for at least five seconds when a tiny flame is brought near it

 

Significance: 

Flash and fire points are used to indicate

• Fire hazard of petroleum products and evaporation loses under high temperature loses,

• It gives us the idea about the maximum temperature below which the oil can be used,

• It is used as the means of identification of specific lubricating oil,

• For detection of contamination in the given lubricating oil.

 

Procedure:

1. Check up the heater working condition of Pensky Marten closed-cup apparatus.

2. Fill up the given sample of oil up to the required level.

3. Place the thermometer and stirrer inside the oil.

4. Switch on the heater and stirrer.

5. Initially regulate the heater to rise in temperature of oil 6 o ±1 o per minute

6. On approaching the flash point the rate is reduced to 3 o ± 0.5 o per minute

7. Place the flame just above the surface of the oil.

8. At one point, a bluish flame appears and it will last for only a fraction of a second.

9. This is the FLASH point temperature of the given sample of oil.

10. Increase the temperature of the oil further and again place the flame just above the surface of the oil.

11. At one point, a reddish or yellowish flame will appear and it will burn continuously.

12. This is the FIRE point temperature of the oil.

13. Remove the stirrer from the Pensky Marten apparatus.

 

Tabulation:

Name of oil	Flash point °c	Fire point °c

 

Result:

Thus the flash point and fire point of given sample oil are found out as follows;

a) The flash point        = __________°C

b) The fire point          = __________ °C

 

PO Attainment:

Composed By:  

 R.Satheesh, M.E., Asso.Prof.,

TE LAB-CLEVELAND OPEN CUP APPARATUS

 

Ex.No:                                                                                                                                     Date:

DETERMINATION OF FLASH AND FIRE POINT

OF OIL BY

CLEVELAND OPEN CUP APPARATUS

Aim:

To find the flash and fire point of the given oil using Cleveland's apparatus

 

Apparatus Required

1 Cleveland's cup apparatus 2. Thermometer

 

Principle:

Mineral Oil when heated sufficiently to high temperature decomposes chemically to hydrocarbons & chemically breakup into volatile combustible gases. Flash point is the lowest temperature at which it forms vapours and produces combustible mixture with air. This is the formation of compressible and slightly explosive gas mixture before the surface of the oil. Fire point or the burning point is the lowest temperature at which the production of combustible gases from the oil is enough to maintain steady state after ignition.

 

Procedure:

• The open cup is filled with the given sample oil up to the standard filling mark in the cup.

• The thermometer is held in the oil in such a way that it does not touch the metallic part.

• The sample of oil is heated so that it gives on vapor.

• At the testing time the test flames is applied by heating short distance over the surface of oil and watched for flickering sound.

• The minimum temperature at which a momentary flash is obtained is called flash point.

• Heating is continued after obtaining the flash point. The lowest temperature at which the ignited vapour continues to burn is called fire point.

• Note the flash point and fire point of the given oil in a separate tabular column.

 

Tabulation:

Name of oil	Flash point °c	Fire point °c

 

Result:

Thus the flash point and fire point of given sample oil are found out as follows;

a) The flash point        = ___________°C

b) The fire point          = ___________ °C

PO Attainment:

Composed By:  

 R.Satheesh, M.E., Asso.Prof.,