MCQ Questions on Generation of Electrical Power

151. The maximum demand of a consumer is 2 kW and the corresponding daily energy consumption is 30 units. The load factor is

(a) 5%
(b) 50%
(c) 62.5%
(d) 75%

152. Sluice gates and automated isolating valves are components of

(a) Valve House
(b) Head race
(c) Spill Way
(d) Penstock [UPPCL – 2016]

153. Among the following which is/are the base load power station/plant?

1. Hydroelectric
2. Biogas
3. Diesel
4. Pumped storage

(a) Only 1, 2, 3
(b) Only 4
(c) Only 4, 3
(d) Only 1, 2

154. Which of the following pair is NOT correctly matched? [UPPCL AE – 2016]

(a) Impulse turbine – Pelton wheel turbine
(b) Impulse turbine – Propellar turbine
(c) Reaction turbine – Kaplan turbine
(d) Reaction turbine – Francis turbine

155. With reference to hydropower station, the graphical representation of water discharge and time is known as

(a) Hydrograph
(b) Hectograph
(c) Load duration curve
(d) Load curve

156. The part of hydel power plant which takes water from valve house to turbine is

(a) Penstock
(b) Forebay
(c) Tail race
(d) Spill way [UPPCL JE 2016]

157. Francis turbine is a/an

(a) Reaction turbine
(b) Impulse turbine
(c) Friction turbine
(d) Friction and Impulse turbine both

158. In a medium or high-head hydroelectric power station, a surge tank is provided to

(a) Reduce the length of the penstock pipes
(b) Augment water at the forebay
(c) Control the pressure variation in the penstock pipes due to sudden load changes
(d) Control the water flow through the turbines

159. Maximum demand tariff is not applied to domestic consumers due to low

(a) Maximum demand
(b) Energy consumption
(c) Power factor
(d) Load factor

160. Form factor is the ratio of

(a) Maximum value to R.M.S. value
(b) Maximum value to average value
(c) R.M.S. value to average value
(d) R.M.S. value to instantaneous value

161. The product of demand factor and load factor is

(a) Average load/maximum demand
(b) Connected load/average load
(c) Connected load/maximum demand
(d) Average load/ connected load

162. In a nuclear power station using boiling water reactor (BWR), water used as

(a) Moderator but not as a coolant
(b) Coolant but not as a moderator
(c) Both moderator and coolant
(d) Neither moderator nor coolant

163. Which of the following material is used as moderator?

(a) Graphite
(b) Boron
(c) Sodium potassium liquid
(d) Plutonium

164. Which of the following power plants involves high initial cost in erecting?

(a) Hydroelectric power plant
(b) Steam power plant
(c) Gas turbine power plant
(d) Nuclear power plant

165. Which of the following is not used as coolant in nuclear power plant? [UPPCL – 2015]

(a) Sodium
(b) Lithium
(c) Helium
(d) Magnesium

166. Which of the following is used as moderator in nuclear power plants? [LMRC – 2015]

(a) Sodium
(b) Graphite
(c) Heavy water
(d) Hydrogen

167. Which of the following will produce the largest amount of energy? [UPPCL – 2016]

(a) Burning of 1 kg petrol
(b) Burning of 1 kg anthracite
(c) Burning of 10 kg wood
(d) Nuclear fission of 1 kg uranium

168. Kalpakkam, Tarapur and Kota are famous for

(a) Hydro Power Plants
(b) Nuclear Power Plants
(c) Thermal Power Plants
(d) Diesel Power Plants [UPPCL – 2016]

169. Which of the following is not used as fuel in nuclear power plants

(a) U-238
(b) U-235
(c) Pu-239
(d) Th-232 [UPPCL-2016]

170. Which one is not a commonly used as coolant for fast breeder reactor?

(a) Water
(b) Liquid metal
(c) Helium
(d) Carbon dioxide

171. Which of the following plant is suitable for peak load?

(a) Diesel engine plant
(b) Steam power plant
(c) Nuclear power plant
(d) Hydro-electric plant

172. A diesel power station spends 0.25 kg/kWh fuel. If the calorific value is 10,000 kcal/kg then overall efficiency of the power station will be

(a) 25%
(b) 30%
(c) 34.4%
(d) 100%

173. Which of the following is not part of diesel engine power plant?

(a) Cooling tower
(b) Penstock
(c) Oil pump
(d) Strainer

174. Which of them is peak load station?

(a) Small capacity thermal plants
(b) Diesel stations
(c) Run of river plant
(d) All of them

175. In a nuclear reactor, chain reaction is controlled by

(a) Graphite rods
(b) Cadmium rods
(c) Brass rods
(d) Iron rods

176. An electrical appliance is rated as 220 V, 5 kW, AC Here, the value 220 V refers to

(a) maximum value
(b) rms value
(c) average value
(d) lowest value [UPPCL – 2016]

177. Capital cost of a gas turbine plant is ……. than that of a steam power plant of same capacity.

(a) Same
(b) Less
(c) More
(d) Irrelevant

178. Compressor used in gas turbines is

(a) Reciprocating compressor
(b) Plunger type compressor
(c) Screw compressor
(d) Multistage axial flow compressor

179. Which is the negative grid voltage for a given plate potential at which ionization of the gas starts? [MP JE – 2016]

(a) Grid baffles
(b) Control grid
(c) Thyratron
(d) Critical grid voltage

180. If ‘a’ denotes rate per kW of maximum demand, ‘b’ is energy rate per kWh and ‘y’ is the energy consumed in kWh, then the total bill given by the expression ‘a + by’ will be

(a) Straight meter Rate
(b) Three part Tariff
(c) Flat demand Rate
(d) Two part Tariff [UPPCL – 2016]

181. A generating station has a connected load of 500 MW and a maximum demand of 250 MW. The units generated being 10000 per week. Calculate the average demand.

(a) 150 kW
(b) 297.6 kW
(c) 29.8 kW
(d) 59.52 kW

182. Load factor for a system or a plant is defined as …….. for a certain period of time. [Jharkhand JE – 2017]

(a) Product of the peak laod and the average load
(b) Ratio of the connected load to the average
(c) Ratio of the peak load to the average load
(d) Ratio of the average load to the peak load

183. A generating station has a connected load of 500 MW and a maximum demand of 250 MW. The units generated being 10000 per week. Calculate the demand factor. [Jharkhand JE – 2017]

(a) 2
(c) 20
(b) 40
(d) 0.5

184. In a power plant decreament in utilization factor means the power plant will

(a) Work as base as well as peak load
(b) Used when necessary
(c) When maintenance is in process
(d) Use for base load only [Jharkhand JE. 2017]

185. Which of the following factor is decided by diversity factor

(a) Plant capacity
(b) Average load
(c) Peak load
(d) kWh generated

186. The area under a load curve gives

(a) Average demand
(b) Energy consumed
(c) Maximum demand
(d) Minimum demand

187. The ratio of average load to the maximum load during a given period is

(a) Demand factor
(b) Diversity factor
(c) Load factor
(d) Connected load [NMRC – 2017]

188. In a generating station, fixed charges at 100% load factor is 6 paise/kWh. With 25% load factor, the charges in paise/kWh would be

(a) 1.5
(b) 10
(c) 24
(d) 3

189. In the context of interconnected systems, which statement is NOT correct? [LMRC JE 2016]

(a) Reduces the installed capacity
(b) Increase the cost of generation
(c) Decreases spinning reserve capacity
(d) Increase the service reliability

190. The efficiency of Sovonius Wind mill is about

(a) 5%
(b) 15%
(c) 25%
(d) 35% [UPPCL JE – 2016]

191. In a bio-gas plant, pH of the slurry is kept between

(a) 4.5 – 5.5
(b) 5.5 – 6.5
(c) 6.5 – 8.5
(d) 8.5 – 10.5 [UPPCL JE – 2016]

192. Which of the following is not a type of Horizontal Axis Wind mill?

(a) Multi Blade
(b) Sail
(c) Propellar
(d) Darious [UPPCL JE – 2016]

193. In context to solar energy production, the efficiency of flat plate collectors is usually

(a) 20 – 30%
(b) 30 – 50%
(c) 50 – 70%
(d) 70 – 90% [UPPCL JE 2016]

194. ………… gas in majority produced by an arcboic decomposition of human or animal excreta.

(a) Methane
(c) Nitrogen di oxide
(d) Ammonia
(b) Carbon dioxide [UPPCL JE 2016]

195. Biogas comprises mainly of

(a) 60% oxygen and 40% carbon dioxide
(b) 60% oxygen and 40% methane
(c) 60% methane and 40% oxygen
(d) 60% methane and rest carbon dioxide [Uttarkhand JE 2013]

196. The possible site for Geothermal energy extraction for the purpose of electricity in India is

(a) Madhya Pradesh
(b) Kerala
(c) Tamil Nadu
(d) Assam [Uttarkhand JE 2013]

197. Minimum wind speed required for generating electricity in a wind mill is

(a) 15 m/hour
(b) 1 km/hour
(c) 15 km/hour
(d) None of the above

198. Non-Conventional methods of power generation is/are

(a) Solar power generation
(b) Thermionic converters
(c) Both of the above
(d) None of the above [MP JE 2016]

199. Match the following

1. Load curve
2. Tidal power
3. Non-conventional methods of power generation
4. Solar cell
5. Everlasting
6. Variation of load on generation the reference to time
7. Photo voltaic effect
8. Fuel cells generation

(a) 1-b 2-a, 3-d, 4-c
(b) 1-a 2-b, 3-c, 4-d
(c) 1-c, 2-d, 3-b, 4-a
(d) 1-a, 2-d, 3-c, 4-b

200. Which of the following statements is false?

(a) The amount of Tidal energy is independent of range of tides
(b) Biogas contains approximately 70% of methane
(c) The manure we get from biogas plant easily mixes with the soil
(d) Solar energy can be employed for running water pumps