MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1901. |
When pressure is applied on the system, icewater, then |
| A. | equilibrium can not be established. |
| B. | more ice will be formed. |
| C. | more water will be formed. |
| D. | evaporation of water will take place. |
| Answer» D. evaporation of water will take place. | |
| 1902. |
Partial molar free energy of an element A in solution is same as its |
| A. | chemical potential |
| B. | activity |
| C. | fugacity |
| D. | activity co-efficient |
| Answer» B. activity | |
| 1903. |
Free energy change at equilibrium is |
| A. | zero |
| B. | positive |
| C. | negative |
| D. | indeterminate |
| Answer» B. positive | |
| 1904. |
Heat pump |
| A. | accomplishes only space heating in winter. |
| B. | accomplishes only space cooling in summer. |
| C. | accomplishes both (a) and (b). |
| D. | works on Carnot cycle. |
| Answer» D. works on Carnot cycle. | |
| 1905. |
The temperature at which both liquid and gas phases are identical, is called the __________ point. |
| A. | critical |
| B. | triple |
| C. | freezing |
| D. | boiling |
| Answer» B. triple | |
| 1906. |
Which of the following types of nuclear reactors is most prone to radioactive hazards ? |
| A. | Pressurised water reactor |
| B. | Gas cooled reactor |
| C. | Molten sodium cooled reactor |
| D. | Boiling water reactor |
| Answer» E. | |
| 1907. |
Thermal neutrons which are used to cause the fission of U-235 have energy __________ eV. |
| A. | < 0.025 |
| B. | > 1 |
| C. | 1-25 |
| D. | > 200. |
| Answer» B. > 1 | |
| 1908. |
Thermal nuclear reactors using enriched uranium as fuel contains a maximum of __________ percent fissile material i.e. U-235. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 7 |
| Answer» D. 7 | |
| 1909. |
The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ? |
| A. | A+Z |
| B. | A- Z |
| C. | A |
| D. | Z |
| Answer» C. A | |
| 1910. |
Which of the following is not used as a nuclear fuel cladding material ? |
| A. | Zircalloy |
| B. | Cadmium |
| C. | Ceramics |
| D. | Stainless steel |
| Answer» C. Ceramics | |
| 1911. |
The first underground nuclear test was conducted by India at |
| A. | Jaisalmer |
| B. | Pokharan |
| C. | Kalpakkam |
| D. | Narora |
| Answer» C. Kalpakkam | |
| 1912. |
A radioactive isotope undergoes decay with respect to time following __________ law. |
| A. | logarithmic |
| B. | exponential |
| C. | linear |
| D. | inverse square |
| Answer» C. linear | |
| 1913. |
The atomic mass of an element is fractional, because |
| A. | of uncertainty principle. |
| B. | it may have isobars. |
| C. | it contains neutrons. |
| D. | it may have isotopes. |
| Answer» E. | |
| 1914. |
Main source of __________ is monazite sand. |
| A. | uranium |
| B. | polonium |
| C. | hafnium |
| D. | thorium |
| Answer» E. | |
| 1915. |
A heterogeneous reactor is the one, in which the moderator and the |
| A. | coolant are different materials. |
| B. | coolant are present in different phases (e.g., heavy water and graphite). |
| C. | fuel are present in different phases (e.g. uranium and heavy water). |
| D. | none of these. |
| Answer» D. none of these. | |
| 1916. |
Radioactivity of an isotope is expressed in |
| A. | barn |
| B. | MeV |
| C. | Curie |
| D. | Ergs |
| Answer» D. Ergs | |
| 1917. |
'Heavy water' is termed as 'heavy' because it is |
| A. | denser than water. |
| B. | an oxide of deuterium. |
| C. | a heavy liquid. |
| D. | an oxide of heavier isotope of oxygen. |
| Answer» C. a heavy liquid. | |
| 1918. |
A pressurised water reactor (PWR) uses pressurised water as a |
| A. | coolant. |
| B. | working fluid in power turbine. |
| C. | moderator. |
| D. | none of these. |
| Answer» B. working fluid in power turbine. | |
| 1919. |
Pressure in a Pressurised Water Reactor (PWR) is used for |
| A. | maintaining constant pressure in the primary cooling circuit under varying loads. |
| B. | superheating the steam. |
| C. | pressurising the water in the primary coolant circuit. |
| D. | none of these. |
| Answer» B. superheating the steam. | |
| 1920. |
The phenomenon of radioactivity was discovered by |
| A. | Madam Curie |
| B. | Bacquerrel |
| C. | Roentgen |
| D. | J.J. Thomson |
| Answer» C. Roentgen | |
| 1921. |
Out of the following places, heavy water plant is not located at |
| A. | Baroda |
| B. | Ramagundam |
| C. | Talcher |
| D. | Tuticorin |
| Answer» C. Talcher | |
| 1922. |
Which of the following isotopes is not present in natural uranium ? |
| A. | U-238 |
| B. | U-234 |
| C. | U-235 |
| D. | U-232 |
| Answer» E. | |
| 1923. |
Water is a better coolant than a gas (like CO2, He, N2 etc.), because it |
| A. | is a better neutron moderator as well. |
| B. | requires comparatively smaller pumps and heat exchanger for a given heat transfer rate. |
| C. | has a better heat transfer characteristics, and it can be pressurised to attain a high temperature. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1924. |
Which of the following is not used as a moderator in nuclear reactor ? |
| A. | Molten sodium |
| B. | Light water |
| C. | Beryllium |
| D. | Boron hydride |
| Answer» B. Light water | |
| 1925. |
In -decay of radioactive material, the ratio of neutron to proton |
| A. | increases. |
| B. | remains same. |
| C. | decreases. |
| D. | is unpredictable; may increase or decrease. |
| Answer» D. is unpredictable; may increase or decrease. | |
| 1926. |
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as |
| A. | isomers |
| B. | isotopes |
| C. | isobars |
| D. | isotones |
| Answer» E. | |
| 1927. |
The critical mass of a fissionable material can be reduced by |
| A. | heating it. |
| B. | cooling it. |
| C. | surrounding it by neutron reflecting material. |
| D. | surrounding it by neutron absorbing material. |
| Answer» D. surrounding it by neutron absorbing material. | |
| 1928. |
Primary purpose of a __________ nuclear reactor is to supply a high neutron flux of the order of 1013 to 1014 neutrons/cm2 second. |
| A. | research |
| B. | power |
| C. | breeder |
| D. | homogeneous |
| Answer» B. power | |
| 1929. |
Nucleus of 92U235 contains __________ protons. |
| A. | 92 |
| B. | 235 |
| C. | 143 |
| D. | 325 |
| Answer» B. 235 | |
| 1930. |
Which of the following undergoes fission reaction easily ? |
| A. | U-235 |
| B. | U-238 |
| C. | Th-232 |
| D. | none of these |
| Answer» B. U-238 | |
| 1931. |
Percentage of heavy water in ordinary water is around |
| A. | 0.015 |
| B. | 7.54 |
| C. | 0.71 |
| D. | 32.97 |
| Answer» B. 7.54 | |
| 1932. |
Safety rods provided in nuclear reactors to guard against accidents, in case of earthquake are made of |
| A. | high carbon steel. |
| B. | molybdenum. |
| C. | zircalloy. |
| D. | boron or cadmium. |
| Answer» E. | |
| 1933. |
Nuclear power generation capacity in India is |
| A. | 3000 MW. |
| B. | 10000 MW. |
| C. | more than hydroelectric power generation capacity. |
| D. | more than thermal power generation capacity. |
| Answer» B. 10000 MW. | |
| 1934. |
Indian monazite sand contains __________ percent thorium. |
| A. | 10 |
| B. | 25 |
| C. | 60 |
| D. | 90 |
| Answer» B. 25 | |
| 1935. |
Out of the following, nucleus of __________ atom contains the largest number of neutrons. |
| A. | U-235 |
| B. | U-238 |
| C. | U-239 |
| D. | Pu-239 |
| Answer» D. Pu-239 | |
| 1936. |
Which of the following radiations is the least penetrating ? |
| A. | -rays |
| B. | -rays |
| C. | -rays |
| D. | X-rays |
| Answer» B. -rays | |
| 1937. |
-rays emission in radioactive disintegration is always accompanied by the emission of |
| A. | -rays |
| B. | -rays |
| C. | neutrons |
| D. | none of these |
| Answer» B. -rays | |
| 1938. |
Hydrogen differs from deuterium in __________ properties. |
| A. | radioactive |
| B. | physical |
| C. | chemical |
| D. | all (a), (b) and (c) |
| Answer» C. chemical | |
| 1939. |
Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage. |
| A. | fuel elements |
| B. | operating personnels |
| C. | walls of the reactor |
| D. | none of these |
| Answer» C. walls of the reactor | |
| 1940. |
Both tritium and deuterium have the same number of |
| A. | neutrons |
| B. | electrons |
| C. | protons |
| D. | nucleons |
| Answer» B. electrons | |
| 1941. |
Which of the following reactors is operated at high neutron flux and low power level ? |
| A. | Breeder reactor. |
| B. | Research reactor. |
| C. | Heterogeneous reactor. |
| D. | Liquid metal (e.g., molten sodium) cooled reactor. |
| Answer» C. Heterogeneous reactor. | |
| 1942. |
Nuclear reactors are provided with shield to guard against the emission of mainly __________ rays. |
| A. | X |
| B. | and |
| C. | neutrons & gamma |
| D. | infrared |
| Answer» D. infrared | |
| 1943. |
Radioactive decay of a material involves a __________ order reaction. |
| A. | third |
| B. | second |
| C. | first |
| D. | zero |
| Answer» D. zero | |
| 1944. |
The mass number of an element is equal to the number of __________ in the nucleus. |
| A. | electrons |
| B. | neutrons |
| C. | protons |
| D. | neutrons plus protons (i.e., nucleons) |
| Answer» E. | |
| 1945. |
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. |
| Answer» D. capability to increase the reaction rate in the core. | |
| 1946. |
Neutrons have mass approximately equal to that of __________ atoms. |
| A. | hydrogen |
| B. | helium |
| C. | deuterium |
| D. | none of these |
| Answer» B. helium | |
| 1947. |
Which of the following is the most harmful for the human being ? |
| A. | -rays |
| B. | X-rays |
| C. | -rays |
| D. | ultra violet rays |
| Answer» D. ultra violet rays | |
| 1948. |
Heavy water is preferred over ordinary water as a coolant, because it. |
| A. | acts both as an efficient coolant as well as a moderator. |
| B. | can be heated to a higher temperature without pressurizing. |
| C. | is less prone to radiation damage. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1949. |
An element having large number of __________ is most easily subjected to nuclear fission. |
| A. | protons |
| B. | electrons |
| C. | neutrons |
| D. | nucleons |
| Answer» E. | |
| 1950. |
Coolant used in a fast breeder reactor is |
| A. | molten sodium |
| B. | heavy water |
| C. | ordinary water |
| D. | helium |
| Answer» B. heavy water | |