MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 317 Mcqs, each offering curated multiple-choice questions to sharpen your ENGINEERING SERVICES EXAMINATION (ESE) knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is |
| A. | Heavy water |
| B. | Graphite |
| C. | Carbon dioxide |
| D. | No moderator is needed |
| Answer» E. | |
| 152. |
Enriched uranium is one in which |
| A. | Percentage of U₂₃₅ has been artificially increased |
| B. | Percentage of U has been artificially increased |
| C. | Percentage of U₂₃₄ has been artificially increased |
| D. | Extra energy is pumped from outside |
| Answer» B. Percentage of U has been artificially increased | |
| 153. |
Which is not identical for an atom and an isotope? |
| A. | Mass number |
| B. | Atomic number |
| C. | Chemical properties |
| D. | Position in periodic table |
| Answer» B. Atomic number | |
| 154. |
Electron volt is the unit of |
| A. | Atomic power |
| B. | Energy |
| C. | Voltage |
| D. | Radio activity |
| Answer» C. Voltage | |
| 155. |
The fast breeder reactor uses the following moderator |
| A. | Demineralised water |
| B. | Carbon dioxide |
| C. | Heavy water |
| D. | No moderator is used |
| Answer» E. | |
| 156. |
Solid fuel for nuclear reactions may be fabricated into various small shapes such as |
| A. | Plates |
| B. | Pallets |
| C. | Pins |
| D. | Any one of the above |
| Answer» E. | |
| 157. |
The function of control rods in nuclear plants is to |
| A. | Control temperature |
| B. | Control radioactive pollution |
| C. | Control absorption of neutron |
| D. | Control fuel consumption |
| Answer» D. Control fuel consumption | |
| 158. |
Natural uranium is made up of |
| A. | 99.282% U₂₃₈, 0.712% U₂₃₅, 0.006% U₂₃₄ |
| B. | 99.282% U₂₃₅, 0.712% U₂₃₈, 0.06%' U₂₃₄ |
| C. | 99.282% U₂₃₄, 0.712% U₂₃₈, 0.006% U₂₃₅ |
| D. | 99.282% U₂₃₅, 0.712% U₂₃₄, 0.006% U₂₃₈ |
| Answer» B. 99.282% U₂₃₅, 0.712% U₂₃₈, 0.06%' U₂₃₄ | |
| 159. |
Which of the following can be used as a coolant in nuclear plant? |
| A. | Light or heavy water |
| B. | Molten lead |
| C. | Carbon dioxide |
| D. | Freon |
| Answer» B. Molten lead | |
| 160. |
In a fission process, maximum percentage of energy is released as |
| A. | Kinetic energy of neutrons |
| B. | Kinetic energy of fission products |
| C. | Instantaneous release of gamma rays |
| D. | Gradual radioactive decay of fission products |
| Answer» C. Instantaneous release of gamma rays | |
| 161. |
The nuclear energy is measured as |
| A. | MeV |
| B. | Curie |
| C. | Farads |
| D. | MW |
| Answer» B. Curie | |
| 162. |
The risk of radioactive hazard is greatest in the turbine with following reactor |
| A. | Pressurised water |
| B. | Boiling water |
| C. | Gas cooled |
| D. | Liquid metal cooled |
| Answer» C. Gas cooled | |
| 163. |
Superheated steam is generated in following reactor |
| A. | Boiling water |
| B. | Gas cooled |
| C. | Pressurised water |
| D. | All of the above |
| Answer» C. Pressurised water | |
| 164. |
A fast breeder reactor uses following as fuel |
| A. | Enriched uranium |
| B. | Plutonium |
| C. | Thorium |
| D. | U₂₃₅ |
| Answer» E. | |
| 165. |
A boiling water reactor uses following as fuel |
| A. | Enriched uranium |
| B. | Plutonium |
| C. | Thorium |
| D. | U |
| Answer» B. Plutonium | |
| 166. |
The mass number of a substance represents the sum of total number of |
| A. | Protons and neutrons in an atom |
| B. | Protons and electrons in an atom |
| C. | Neutrons and electrons in an atom |
| D. | Protons and neutrons in a nucleus |
| Answer» E. | |
| 167. |
Which of the following statement is correct regarding the features of a Breeder reactor? |
| A. | It produces more fuel than it consumes |
| B. | It requires highly enriched fuel |
| C. | It requires liquid sodium metal as moderator |
| D. | All of the above |
| Answer» E. | |
| 168. |
The size of the reactor is said to be critical when |
| A. | Chain reaction can be initiated |
| B. | It becomes uncontrollable |
| C. | It explodes |
| D. | It produces no power |
| Answer» B. It becomes uncontrollable | |
| 169. |
Reactors for propulsion applications are designed for |
| A. | Any form of uranium |
| B. | Natural uranium |
| C. | Enriched uranium |
| D. | Plutonium |
| Answer» D. Plutonium | |
| 170. |
Reactors designed for propulsion applications are designed for |
| A. | Natural uranium |
| B. | Enriched uranium |
| C. | Pure uranium |
| D. | Any type of uranium |
| Answer» C. Pure uranium | |
| 171. |
Reactors for propulsion applications use |
| A. | Natural uranium |
| B. | Molten lead |
| C. | Any form of uranium |
| D. | Thorium |
| Answer» C. Any form of uranium | |
| 172. |
The percentage 02 by volume in atmosphere air is |
| A. | 21% |
| B. | 23% |
| C. | 77% |
| D. | 79% |
| Answer» B. 23% | |
| 173. |
The draught in locomotive boilers is produced by |
| A. | forced fan |
| B. | chimney |
| C. | steam jet |
| D. | only motion of locomotive |
| Answer» D. only motion of locomotive | |
| 174. |
The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is |
| A. | 0.555 |
| B. | 0.578 |
| C. | 0.5457 |
| D. | 0.6 |
| Answer» D. 0.6 | |
| 175. |
The cooling section in the surface condenser |
| A. | increases the quantity of vapour extracted along with air |
| B. | reduces the quantity of vapour extracted along with air |
| C. | does not affect vapour quantity extracted but reduces pump capacity of air extraction pump |
| D. | none of the above |
| Answer» C. does not affect vapour quantity extracted but reduces pump capacity of air extraction pump | |
| 176. |
Steam turbines are governed by the following methods |
| A. | Throttle governing |
| B. | Nozzle control governing |
| C. | By-pass governing |
| D. | all of the above |
| Answer» E. | |
| 177. |
Pipes carrying steam are generally made up of |
| A. | steel |
| B. | cast iron |
| C. | copper |
| D. | aluminium |
| Answer» B. cast iron | |
| 178. |
The maximum length of a screw conveyer is about |
| A. | 30 metres |
| B. | 40 metres |
| C. | 60 metres |
| D. | 100 metres |
| Answer» B. 40 metres | |
| 179. |
Bucket elevators are used for |
| A. | carrying coal in horizontal direction |
| B. | carrying coal in vertical direction |
| C. | carrying coal in any direction |
| D. | none of the above |
| Answer» C. carrying coal in any direction | |
| 180. |
In steam turbines the reheat factor |
| A. | increases with the increase in number of stages |
| B. | decreases with the increase in number of stages |
| C. | remains same irrespective of number of stages |
| D. | none of the above |
| Answer» B. decreases with the increase in number of stages | |
| 181. |
The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is |
| A. | Higher |
| B. | Lower |
| C. | Same as long as initial pressure and temperature is unchanged |
| D. | None of the above |
| Answer» B. Lower | |
| 182. |
The overall efficiency of thermal power plant is equal to |
| A. | Rankine cycle efficiency |
| B. | Carnot cycle efficiency |
| C. | Regenerative cycle efficiency |
| D. | Boiler efficiency x turbine efficiency x generator efficiency |
| Answer» D. Boiler efficiency x turbine efficiency x generator efficiency | |
| 183. |
For Parson's reaction steam turbine, degree of reaction is |
| A. | 75% |
| B. | 100% |
| C. | 50% |
| D. | 60% |
| Answer» D. 60% | |
| 184. |
Edward?s air pump |
| A. | removes air and also vapour from condenser |
| B. | removes only air from condenser |
| C. | removes only un-condensed vapour from condenser |
| D. | removes air alongwith vapour and also the condensed water from condenser |
| Answer» E. | |
| 185. |
Rateau steam turbine is |
| A. | reaction steam turbine |
| B. | velocity compounded impulse steam turbine |
| C. | pressure compounded impulse steam turbine |
| D. | pressure velocity compounded steam turbine |
| Answer» D. pressure velocity compounded steam turbine | |
| 186. |
The maximum percentage gain in Regenerative feed heating cycle thermal efficiency |
| A. | increases with number of feed heaters increasing |
| B. | decreases with number of feed heaters increasing |
| C. | remains same unaffected by number of feed heaters |
| D. | none of the above |
| Answer» B. decreases with number of feed heaters increasing | |
| 187. |
Regenerative cycle thermal efficiency |
| A. | is always greater than simple Rankine thermal efficiency |
| B. | is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure |
| C. | is same as simple Rankine cycle thermal efficiency |
| D. | is always less than simple Rankine cycle thermal efficiency |
| Answer» B. is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure | |
| 188. |
Deaerative heating is done to |
| A. | Heat the water |
| B. | Heat the air in the water |
| C. | Remove dissolved gases in the water |
| D. | None of these |
| Answer» D. None of these | |
| 189. |
The main source of production of biogas is |
| A. | human waste |
| B. | wet cow dung |
| C. | wet livestock waste |
| D. | all above |
| Answer» E. | |
| 190. |
The average ash content in Indian co als is about |
| A. | 5% |
| B. | 10% |
| C. | 15% |
| D. | 20% |
| Answer» E. | |
| 191. |
The energy radiated by sun on a bright sunny day is approximately |
| A. | 700 W/m² |
| B. | 800 W/m² |
| C. | 1 kW/m² |
| D. | 2 kW/m² |
| Answer» D. 2 kW/m² | |
| 192. |
In regenerative cycle feed water is heated by |
| A. | exhaust gases |
| B. | heaters |
| C. | draining steam from the turbine |
| D. | all above |
| Answer» D. all above | |
| 193. |
Mercury is a choice with steam in binary vapour cycle because it has |
| A. | higher critical temperature and pressure |
| B. | higher saturation temperature than other fluids |
| C. | relatively low vapourisation pressure |
| D. | all above |
| Answer» E. | |
| 194. |
Curtis turbine is |
| A. | reaction steam turbine |
| B. | pressure velocity compounded steam turbine |
| C. | pressure compounded impulse steam turbine |
| D. | velocity compounded impulse steam turbine |
| Answer» C. pressure compounded impulse steam turbine | |
| 195. |
Reheat factor is the ratio of |
| A. | isentropic heat drop to useful heat drop |
| B. | adiabatic heat drop to isentropic heat drop |
| C. | cumulative actual enthalpy drop for the stages to total is isentropic enthalpy heat drop |
| D. | none of the above |
| Answer» D. none of the above | |
| 196. |
The amount of air which is supplied for complete combustion is called |
| A. | primary air |
| B. | secondary air |
| C. | tertiary air |
| D. | none of the above |
| Answer» C. tertiary air | |
| 197. |
Economisers improve boiler efficiency by |
| A. | 1 to 5% |
| B. | 4 to 10% |
| C. | 10 to 12% |
| D. | 8 to 12% |
| Answer» C. 10 to 12% | |
| 198. |
In a shell and tube surface condenser |
| A. | steam and cooling water mix to give the condensate |
| B. | cooling water passes through the tubes and steam surrounds them |
| C. | steam passes through the cooling tubes and cooling water surrounds them |
| D. | all of the above varying with situation |
| Answer» C. steam passes through the cooling tubes and cooling water surrounds them | |
| 199. |
Artificial draught is produced by |
| A. | induced fan |
| B. | forced fan |
| C. | induced and forced fan |
| D. | all of the above |
| Answer» E. | |
| 200. |
A steam power station requires space |
| A. | equal to diesel power station |
| B. | more than diesel power station |
| C. | less than diesel power station |
| D. | none of the above |
| Answer» C. less than diesel power station | |