Description : Which is used as a coolant in nuclear reactor due to its high capture cross-section? (A) H2 (B) N2 (C) He (D) CO2
Last Answer : (A) H2
Description : H2 is a better coolant than CO2 , due to it’s relatively (A) Lower density (B) Higher specific heat (C) Non-reactivity to uranium (D) Lower neutron capture cross-section
Last Answer : (B) Higher specific heat
Description : __________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section. (A) Nitrogen (B) Hydrogen (C) Helium (D) Carbon dioxide
Last Answer : (A) Nitrogen
Description : Water is a better coolant than a gas (like CO2 , He, N2 etc.), because it (A) Is a better neutron moderator as well (B) Require comparatively smaller pumps and heat exchanger for a given heat transfer rate ... , and it can be pressurised to attain a high temperature (D) All (A), (B) and (C)
Last Answer : (D) All (A), (B) and (C)
Description : Heavy water (D2O) in a nuclear reactor serves as a (A) Coolant (B) Moderator (C) Both (A) & (B) (D) Neutron absorber
Last Answer : (C) Both (A) & (B)
Description : Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect? (A) CO2 (B) H2 (C) SO3 (D) N2
Last Answer : (C) SO3
Description : Kopper-Totzek coal gasifier (A) Can give ammonia synthesis gas (H2 + N2 ) (B) Is a moving bed reactor (C) Cannot use coking coal (D) Operate at very high pressure
Last Answer : (A) Can give ammonia synthesis gas (H2 + N2 )
Description : All gases during throttling process at atmospheric temperature and pressure show a cooling effect except (A) CO2 (B) H2 (C) O2 (D) N2
Last Answer : (B) H2
Description : Pressure of CO2 gas (which is a coolant) in the Calder-Hall nuclear reactor is __________ kgf/cm2 . (A) 0.2 (B) 7 (C) 35 (D) 50
Last Answer : (B) 7
Description : __________ gas is normally employed in B.E.T. method of finding out the surface area of catalyst. (A) N2 (B) H2 (C) CO2 (D) He
Last Answer : (A) N2
Description : Molten sodium is used as a coolant in a fast breeder reactor, because of its (A) Excellent moderating properties (B) Neutron breeding capability (C) Faster heat removal capability from the core (D) Capability to increase the reaction rate in the core
Last Answer : (C) Faster heat removal capability from the core
Description : In the gaseous phase ammonia formation reaction (N2 + 3H2 ⇌ 2NH3 ), the value of the equilibrium constant depends on the (A) Total pressure of the system (B) Volume of the reactor (C) Temperature (D) Initial concentration of N2 and H2
Last Answer : (C) Temperature
Description : Which of the following gases will effuse out of football bladder most wieldy? (1) He (2) H2 (3) N2 (4) 02
Last Answer : (2) H2 Explanation: Hydrogen is a chemical element with symbol H and atomic number 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen is the lightest ... forms covalent compounds with most elements and is present in the-water molecule and in most organic compounds.
Description : Which of the following gases will effuse out of football bladder most quickly ? (1) He (2) H2 (3) N2 (4) O2
Last Answer : H2
Description : The calorific value of a gas of composition CO2 = 20%, H2 = 50%, CH4 = 30%, is y. If the composition of gas is changed to H2 = 50%, CH4 = 30%, CO2 = 10%, N2 = 10%, then the calorific value will be (A) y (B) 0.95 y (C) 1.05 y (D) 1.8 y
Last Answer : (A) y
Description : . Water gas constitutes mainly of (A) CO & H2 (B) CO & N2 (C) CO2 & H2 (D) CH4 & H2
Last Answer : (A) CO & H2
Description : Largest constituent of blast furnace gas is (A) N2 (B) CO (C) CO2 (D) H2
Description : Producer gas comprises mainly of (A) CO & N2 (B) CO & H2 (C) CO2 & N2 (D) CO2 & H2
Last Answer : (A) CO & N2
Description : Main constituents of purified Lurgi gas are (A) H2 , CmHn & CO2 (B) CO, H2 & CH4 (C) CO2 , O2 & CO (D) N2 , H2 & CO2
Last Answer : (B) CO, H2 & CH4
Description : Blast furnace gas constitutes mainly of (A) N2 & CH4 (B) N2 & H2 (C) N2 & CO (D) CH4 & CO2
Last Answer : (C) N2 & CO
Description : Main component of sewage gas produced during anaerobic decomposition of organic waste (by suitable bacteria) during sewage disposal is (A) H2 (B) CH4 (C) CO2 (D) N2
Last Answer : (B) CH4
Description : Raw materials for urea production are (A) CO2 and N2 (B) CO2 , H2 and N2 (C) NH3 and CO (D) HNO3 and CaCO3
Last Answer : (B) CO2 , H2 and N2
Description : The essential ingredient of all the synthesis gas is (A) H2 (B) O2 (C) CO2 (D) N2
Last Answer : (A) H
Description : . Shift conversion reaction (A) Converts N2 and H2 into NH3 (B) Converts CO to CO2 with steam (C) Is non-catalytic (D) Is highly exothermic
Last Answer : (B) Converts CO to CO2 with steam
Description : Synthesis gas' meant for the synthesis of organic compound is a variable mixture of (A) N2 & H2 (B) CO2 & H2 (C) CO & H2 (D) C & H2
Last Answer : (C) CO & H2
Description : Producer gas consists mainly of (A) CO, CO2 N2 , H2 (B) CO, H2 (C) H2 , CH4 (D) C2H2 , CO2 , H2
Last Answer : (A) CO, CO2 N2 , H2
Description : Synthesis gas is a mixture of (A) CO and H2 (B) N2 and H2 (C) H2 , CH4 and CO (D) CO2 and H2
Last Answer : (A) CO and H2
Description : In an ammonia plant, the purge off is essential to (A) Maintain inert gas concentration within a limit (B) Remove excess poisonous gases (C) Maintain H2 : N2 ratio at 3 :1 (D) Remove uncondensed ammonia vapour
Last Answer : (C) Maintain H2 : N2 ratio at 3 :1
Description : Which of the following gases makes bread or cake rise making them soft and spongy? (1) CO (2) H2 (3) CO2 (4) O2
Last Answer : (3) CO2 Explanation: Breads rise due to the process of fermentation, a chemical process by which molecules such as glucose are broken down an aerobically.
Description : Thermal shield is used in high powered nuclear reactors to (A) Protect the walls of the reactor from radiation damage B) Absorb the fast neutrons (C) Slow down the secondary neutrons (D) Protect the fuel element from coming in contact with the coolant
Last Answer : (A) Protect the walls of the reactor from radiation damage
Description : An ideal coolant for a nuclear reactor should (A) Be a good absorber of neutrons (B) Be capable of attaining high temperature, only when it is pressurised (C) Have high density, but low heat transfer co-efficient (D) Be free from radiation damage and non-corrosive
Last Answer : (D) Be free from radiation damage and non-corrosive
Description : Producer gas is a mixture of (a) CO and H2 (b) CO and N2 (c) CH4 and H2 (d) CO2 and H2
Last Answer : Ans:(a)
Description : Water gas is a mixture of (A) CO2 and O2 (B) O2 and H2 (C) H2, N2 and O2 (D) CO, N2 and H2.
Last Answer : CO, N2 and H2.
Description : A green house gas is a) H2 b) CO c) CO2 d) N2.
Last Answer : c) CO2
Description : High purity nitrogen is used in (A) Making protective gas (95% N2 + 5% H2 ) for annealing of cold rolled steel strip coils (B) Fire fighting purposes (C) Both (A) & (B) (D) Neither (A) nor (B)
Description : Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 10 13 to 10 14neutrons/cm2 second. (A) Research (B) Power (C) Breeder (D) Homogeneous
Last Answer : (A) Research
Description : What is the maximum amount of NH3 gas formed by mixing of 14 g N2 and 6 g H2 gases is?
Last Answer : N2(g) + 3H2(g) ==> 2NH3(g) is the balanced equation for thisreaction.14 g N2 x 1 mole N2/28 g = 0.5 moles N2 present6 g H2 x 1 mole H2/2 g = 3 moles O2 presentIn this situation, the amount of N2 ... by the amount of N2.0.5 moles N2 x 2 moles NH3/1 mole N2 = 1 moles NH3 is themaximum amount of NH3.
Description : In a homogeneous nuclear reactor, the __________ are mixed together. (A) Fuel & coolant (B) Fuel & moderator (C) Coolant & moderator (D) None of these
Last Answer : (B) Fuel & moderator
Description : A homogeneous reactor is the one, in which the (A) Fissile atoms are evenly distributed throughout the mass of nuclear reactor (B) Same substance (e.g. heavy water) is used as moderator & coolant (C) The fuel and the moderator is mixed to form a homogeneous material (D) All (A), (B) and (C)
Last Answer : (C) The fuel and the moderator is mixed to form a homogeneous material
Description : Light water' used as a coolant in nuclear reactor is nothing but (A) Ordinary water (B) Mildly acidic (pH = 6) water (C) Mildly alkaline (pH = 8) water (D) None of these
Last Answer : (A) Ordinary water
Description : Name the chemical element that is eleventh in the Lanthanide Series in the periodic table. Because of the metal's high thermal-neutron-absorption cross section, it has been of much interest in terms of use in nuclear reactor hardware. The chemical symbol for this element is Er.
Last Answer : ANSWER: ERBIUM
Description : A nuclear reactor can't be used for (A) The production of radioisotopes (B) Supplying intense fields or beams of neutron for scientific experiments (C) Marine ship propulsion (D) None of these
Last Answer : (D) None of these
Description : Graphite is used in nuclear reactor as (A) Insulation lining of the reactor (B) Fuel (C) Lubricant (D) Retarder of neutron velocity
Last Answer : (D) Retarder of neutron velocity
Description : The most unsuitable reactor for carrying out reactions in which high reactant concentration favours high yields is (A) Backmix reactor (B) Plug flow reactor (C) Series of CSTR (D) PFR in series
Last Answer : A) Backmix reactor
Description : In nuclear reactor, heavy water is used as – (1) coolant (2) fuel (3) moderator (4) atomic smasher
Last Answer : (3) moderator Explanation: Heavy water is used in certain types of nuclear reactors where it acts as a neutron moderator to slow down neutrons so that they are more likely to react with ... do not require uranium enrichment, heavy water reactors are of concern in regards to nuclear proliferation.
Description : Which nuclear reactor uses water as a coolant, moderator and reflector ?
Last Answer : Pressurised water reactor.
Description : Heavy water used as a coolant in nuclear reactor. Heavy Water is:
Last Answer : Water containing heavy Isotopes of Hydrogen atom
Description : Reactors in commercial nuclear power plants in the U.S. are often referred to as thermal reactors. A thermal reactor uses: w) fissionable plutonium-239 as fuel. x) a relatively low heat output. y) neutrons moderated to relatively low energies. z) liquid sodium as a coolant.
Last Answer : ANSWER: Y -- NEUTRONS MODERATED TO RELATIVELY LOW ENERGIES.
Description : The part of a nuclear power plant that prevents thermal pollution of lakes or rivers is the: w) reactor x) coolant/moderator y) cooling tower z) control rod
Last Answer : ANSWER: Y -- COOLING TOWER