qids stringlengths 11 16 | qstr stringclasses 4
values | num_words int64 9 145 | questions stringlengths 44 799 | subject stringclasses 14
values | label stringlengths 1 30 | __index_level_0__ int64 0 113 |
|---|---|---|---|---|---|---|
G-META-13-35 | MCQS-NUM | 38 | Saturation magnetization of an FCC metal with lattice parameter 0.2 nm is 600 kA/m. The net magnetic moment per atom is given by (in Bohr magneton) (A) 8.08 * $10^(57)$ (B) 2.02 * $10^(57)$ (C) 0.517 (D) 0.129 | Magnetism | D | 10 |
G-META-18-47 | NUM | 51 | If the net magnetic moment of an Fe atom in BCC structure is 2 ๐๐ต, then what is the saturation magnetization of Fe in kAm-1 rounded off to one decimal place? Given: ๐๐ต = 9.273 ร $10^(-24)$ A $m^2$, Lattice parameter of BCC iron is 0.287 nm Note: kA is kiloAmperes | Magnetism | 1500 TO 1600 | 11 |
G-META-20-39 | MATCH | 55 | Match the elements in Column I with their electronic behaviour given in Column II. Column I: [(P) Copper, (Q) Iron, (R) Mercury, (S) Silicon] Column II: [1. Ferromagnetic, 2. Superconducting, 3. Semiconducting, 4. Diamagnetic] Options: (A) P-1, Q-2, R-3, S-4 (B) P-3, Q-4, R-1, S-2 (C) P-4, Q-1, R-2, S-3 (D) P-4, Q... | Magnetism | C | 12 |
G-META-22-39 | MCQS | 91 | Figures P, Q, R and S (in the image) schematically show the atomic dipole moments in the absence of external magnetic field. Which one of the following is the correct mapping of nature of magnetism to atomic dipole moments? (A) P - Diamagnetism, Q - Antiferromagnetism, R - Paramagnetism, S - Ferromagnetism (B) P โ Fe... | Magnetism | B | 13 |
G-META-21-20 | NUM | 42 | Given: (Lattice paramter of iron at room temperature = 0.287 nm). If saturation magnetization of iron at room temperature is 1700 $kAm^(-1)$, then magnetic moment (in $Am^(2)$) per iron atom in the crystal is x * $10^(-23)$(round off to 1 decimal place). | Magnetism | 1.7 TO 2.3 | 14 |
G-XEC-2012-8 | MCQS | 25 | Microstrain can be measured by X-ray diffraction using peak (A) Area and intensity (B) Position and area (C) Broadening and intensity (D) Position and broadening | Material characterization | D | 0 |
G-XEC-2012-11 | MATCH | 71 | Match the characterization techniques in Column I with the options in Column II: Column I : [P.Scanning tunneling microscopy, Q. Scanning electron microscopy, R. Transmission electron microscopy, S. Atomic force microscopy] Column II : [1. No vacuum required, 2. Backscattered electrons, 3. Photoelectrons, 4. Atomical... | Material characterization | A | 1 |
G-XEC-2013-12 | MATCH | 89 | Match the microscopes listed in Column I with their principle of operation listed in Column II: Coloumn I: [P. Scanning Electron Microscope (SEM), Q. Transmission Electron Microscope(TEM), R. Scanning Tunnelling Microscope (STM), S. Atomic Force Microscope (AFM)] Coloumn II: [1. van der Waals forces between atoms, 2.... | Material characterization | C | 2 |
G-XEC-2014-4 | MCQS | 29 | Quantitative measurement of the roughness of a polysilicon wafer can be performed with (A) scanning tunneling microscopy (B) scanning electron microscopy (C) transmission electron microscopy (D) atomic force microscopy | Material characterization | D | 3 |
G-XEC-2015-53-10 | MATCH | 68 | Match the techniques listed in Column I with the characteristics of the materials measured in Column II. Coloumn I : [P. DSC, Q. XRD, R. STM, S. SEM] Coloumn II: [1. Density of states, 2. Glass transition temperature, 3. Cathodoluminescence, 4. Crystal structure, 5. Thermal expansion coefficient] Options: (A) P-2,... | Material characterization | C | 4 |
G-XEC-2016-1 | MCQS | 46 | Energy Dispersive Spectroscopy (EDS) in a typical scanning electron microscope enables elemental identification by collecting and examining which of the following: (A) Secondary electrons from the sample (B) Back scattered electrons from the sample (C) Characteristic X-rays from the sample (D) Diffraction pattern from... | Material characterization | C | 5 |
G-XEC-2017-5 | MCQS | 41 | The contrast obtained in scanning electron microscope using back scattered electrons depends on (A) Atomic number of the specimen material (B) Accelerating voltage of the microscope (C) Working distance in the microscope (D) Type of the electron emitter in the microscope | Material characterization | A | 6 |
G-XEC-2019-8 | MCQS | 23 | Glass transition temperature of a polymer can be determined by (A) Thermo-gravimetric analysis (B) Raman spectroscopy (C) NMR spectroscopy (D) Differential scanning calorimetry | Material characterization | D | 7 |
G-XEC-2021-6 | MCQS | 48 | In scanning electron microscopy, the resolution of backscattered electron (BSE) image is poorer compared to that of secondary electron (SE) image, because (A) energy of BSE is lower (B) sampling volume of BSE is larger (C) yield of BSE is lower (D) sampling volume of SE is larger | Material characterization | B | 8 |
G-XEC-2021-10 | MATCH | 78 | In the context of scanning electron microscopy, match the information in Column I with most appropriate information in Column II. Column I: [(P) Secondary electrons, (Q) Backscattered electrons, (R) Characteristic X-rays, (S) Diffracted backscattered electrons] Column II: [(1) Crystallographic orientation of grains, ... | Material characterization | B | 9 |
G-XEC-2022-5 | MCQS | 98 | A differential scanning calorimetry (DSC) experiment tracks the heat flow into or out of a system as a function of temperature. If the experiments given in the options below are performed at 1 atmospheric pressure, then in which case will the DSC thermogram exhibit a spike, either upward or downward? (A) Heating 10 mg... | Material characterization | C | 10 |
G-META-13-39 | MATCH | 81 | Match the suitability of non-destructive testing method in Group I for the detection of defects listed in Group II: Group I: [(P) Magnetic particle inspection, (Q) X-ray radiography, (R) Dye penetrant test, (S) Ultrasonic testing] Group II; [(1) Surface crack in martensitic stainless steels, (2) Surface crack in aust... | Material characterization | D | 11 |
G-META-14-25 | MCQS | 32 | Which one of the following signals from a specimen is used in a scanning electron microscope to get quantitative elemental analysis? (A) Secondary electrons (B) Backscattered electrons (C) X-rays (D) Transmitted electrons | Material characterization | C | 12 |
G-META-19-30 | MCQS | 46 | In a typical scanning electron microscope (SEM) image, information about topography and atomic contrast are obtained from ? (A) secondary electron and auger electron, respectively. (B) primary electron and secondary electron, respectively. (C) secondary electron and back-scatter electron, respectively. (D) back-scatte... | Material characterization | C | 13 |
G-META-12-7 | MCQS-NUM | 47 | A fluid is flowing with a velocity of 0.5 m/s on a plate moving with a velocity of 0.01 m/s in the same direction. The velocity at the interface of the fluid and plate is (A) 0.0 m/s (B) 0.01 m/s (C) 0.255 m/s (D) 0.50 m/s | Fluid | B | 0 |
G-META-12-49 | MCQS-NUM | 115 | A steel ball (density $ฯ_(steel)$ = 7200 kg/$m^(3)$) is placed in an upward moving liquid Al (density $ฯ_(Al)$ = 2360 kg/$m^(3)$, viscosity $ฮผ_(Al)$ = 1*$10^(โ3)$ Pa.s and Reynolds number = 5*$10^(5)$). The force (F) exerted on the steel ball is expressed as: F = f ฯ $R^(2)$ ($ฯ_(Al)$ $v^2$ /2) where, f is friction fac... | Fluid | B | 1 |
G-META-16-35 | NUM | 69 | Given data: Density of liquid metal = 7000 kg.$m^(-3)$, Nozzle diameter = 30 mm, Nozzle discharge coefficient = 0.80 .The height of a liquid metal column in a cylindrical vessel is 3.2 m. At time t=0, liquid metal is drained out from the vessel through a small nozzle located at the base of the vessel. Neglecting fricti... | Fluid | 31.0 TO 32.0 | 2 |
G-META-16-36 | MATCH | 59 | Match entities listed in Column I with their correct dimensions given in Column II: Column I: [[P] Drag coefficient, [Q] Mass transfer coefficient, [R] Viscosity, [S] Mass flux] Column II: [[1] $ML^(-1)T^(-1)$, [2] $ML^(-2)T^(-1)$, [3] $M^(0)L^(0)T^(0)$, [4] $M^(0)LT^(-1)$] Options: (A) P-3, Q-4, R-1, S-2 (B) P-3... | Fluid | A | 3 |
G-META-18-1 | MCQS | 83 | For a laminar flow of a liquid metal over a flat plate, the thicknesses of the velocity and thermal boundary layers are $๐ฟ_๐ฃ$ and $๐ฟ_๐ก$ respectively. Kinematic viscosity (viscosity/density) of liquid metal is significantly lower than its thermal diffusivity [thermal conductivity / (density ร specific heat)]. Based ... | Fluid | A | 4 |
G-META-18-3 | MCQS | 68 | Analysis of a flow phenomenon in a system requires the following variables: i. Pressure [M$L^(-1)T^(-2)$] ii. Velocity of the fluid [$LT^(-1)$] iii. Size of the system [L] iv. Density of the fluid [M $L^(-3)$] v. Viscosity of the fluid [M$L^(-1)T^(-1)$]. According to Buckingham Pi theorem (dimensional analysis) what is... | Fluid | A | 5 |
G-META-19-7 | MCQS | 82 | Terminal rise velocity of a spherical shaped solid in a liquid obeys the following functional relationship: U = f(d, W, ยต, ฯ), Where, U is the terminal rise velocity, d is the diameter of the solid, W is the apparent weight of the solid, ยต is the viscosity of liquid and ฯ is the density of liquid. According to Buckingh... | Fluid | B | 6 |
G-META-19-44 | NUM | 67 | Assume Darcyโs law is applicable and g = 9.8 ๐. $๐ ^(โ2)$. Density of water = 1000 ๐๐.$๐^(โ3)$. Pressure drop in the granular zone of a blast furnace is 300 mm of water per meter of the bed height. The bed permeability is 0.8 $๐^(4).๐^(โ1).๐ ^(โ1)$ . The volumetric flow rate of gas per unit area through the bed [... | Fluid | 2347 TO 2357 | 7 |
G-META-20-53 | NUM | 80 | Given: 1. Acceleration due to gravity is 9.8 $m.s^(-2)$. Cross-sectional area of gate is 0.2 $m^2$. In a top gated mold, liquid metal enters the mold cavity as freely falling stream under gravity from a height of 0.5m. Ignore the fluid friction due to viscosity and the drag due to changes in the direction of flow. If t... | Fluid | 14 TO 18 | 8 |
G-META-21-34 | MCQS | 78 | For a fully developed 1-D flow of Newtonian fluid through a horizontal pipe of radius R (see figure), the axial velocity ($v_z$) is given by: $v_z$ = [ฮP/L]*({$R^2$ - $r^2$}/4ยต), where ฮP is the pressure difference (P1- P2), ยต is the viscosity, r is the radial distance from the axis and L is the length of the tube. The... | Fluid | A | 9 |
G-META-22-18 | MCQS | 28 | In fluid flow, the dimensionless number that describes the transition from laminar to turbulent flow is (A) Reynolds number (B) Schmidt number (C) Biot number (D) Prandtl number | Fluid | A | 10 |
G-META-22-45 | MCQS | 145 | A non-rotating smooth solid spherical object is fixed in the stream of an inviscid incompressible fluid of density ๐ (see figure). The flow is horizontal, slow, steady, and fully developed far from the object as shown by the streamline arrows near point O. Which of the following statement(s) is(are) TRUE? (Note: B is ... | Fluid | A,B,D | 11 |
G-META-13-47 | NUM | 61 | [Given: density of steel = 7000 kg/$m^3$ , density of alumina = 3650 kg/$m^3$ , viscosity of steel = 6*$10^(-3)$ kg/m/s]. Ladle deoxidation of liquid steel is done at 1600ยฐC by adding ferro-aluminium. By assuming Stokes law behaviour, time (in s) required for alumina particles of 50 ยตm diameter to float to the surface ... | Fluid | 2626 TO 2632 | 12 |
G-META-18-45 | NUM | 75 | Assume Stokes law; i.e., drag force $๐น_๐$ = 3๐๐๐ท๐ฃ, where ๐ is the viscosity of steel. Given: Density of liquid steel = 7900 kg $m^(-3)$ ; Viscosity of liquid steel = 0.0079 Pa s; Density of the inclusion = 2500 kg $m(-3)$ ; Acceleration due to gravity = 9.8 m $s^(-2)$. The terminal velocity(in mm$s^(-1)$ to two ... | Fluid | 0.9 TO 1.0 | 13 |
G-META-14-14 | MCQS | 31 | Which one of the following NDT techniques CANNOT be used to detect an internal crack in a steel shaft? (A) Liquid penetrant inspection (B) Radiography (C) Ultrasonic testing (D) X-ray tomography | Material testing | A | 0 |
G-META-15-50 | MCQS | 45 | Which of the following techniques are NOT applicable for detecting internal flaws in a ceramic material? 1. Liquid penetration test 2. Radiography 3. Ultrasonic testing 4. Eddy current method (A) 1 and 3 (B) 3 and 4 (C) 2 and 4 (D) 1 and 4 | Material testing | D | 1 |
G-META-16-23 | MCQS | 37 | For dye-penetrant test, identify the CORRECT statement (A) Pre- and post-cleaning of parts are not required (B) Internal defects can be detected (C) Surface oxides helps in crack identification (D) Dye with low contact angle is required | Material testing | D | 2 |
G-META-17-25 | MCQS | 25 | Dye penetrant test is based on the principle of (A) polarizes sound waves in liquid (B) magnetic domain (C) absorption of X-rays (D) capillary action | Material testing | D | 3 |
G-META-18-19 | MCQS | 52 | A long oil pipeline made of steel is suspected to have developed a scale on the inner surface due to corrosion. Which of the following non-destructive techniques is the most suitable for detecting and quantifying such a defect? (A) Dye penetrant test (B) Magnetic particle inspection (C) Ultrasonic inspection (D) Acous... | Material testing | C | 4 |
G-META-19-21 | MCQS | 32 | The most suitable non-destructive testing method for detecting small internal flaws in a dense bulk material is? (A) Dye penetrant method (B) Ultrasonic inspection (C) Eddy current testing (D) Magnetic particle inspection | Material testing | B | 5 |
G-META-20-9 | MCQS | 21 | The dye penetrant test for detecting flaws is based on: (A) Magnetism (B) Sound propagation (C) X-ray absorption (D) Capillary action | Material testing | D | 6 |
G-META-21-28 | MATCH | 65 | Match the nondestructive technique (in Coloumn I) with its underlying phenomenon (in Column II): Column I: [(P) Dye penetrant test, (Q) Radiography, (R) Eddy current test, (S) Ultrasonic inspection] Column II: [1. X-ray absorption, 2. Capillary action, 3. Elastic waves reflection, 4. Electromagnetic induction] Opt... | Material testing | C | 7 |
G-META-22-16 | MCQS | 37 | Which one of the following Non Destructive Testing (NDT) techniques CANNOT be used to identify volume defects in the interior of a casting? (A) Ultrasonic testing (B) X-ray computed tomography (C) Dye-penetrant testing (D) Gamma ray radiography | Material testing | C | 8 |
G-XEC-2012-10 | MATCH | 60 | Match the properties in Column I with the appropriate units in Column II: Column I: [P. Thermal diffusivity, Q. Fracture toughness, R. Surface energy, S. Magnetic permeability] Column II: [1. Hmโ1, 2. m2sโ1, 3. Fmโ1, 4. Nmโ3/2, 5. Jmโ2] Options: (A) P-2, Q-5, R-4, S-1 (B) P-2, Q-4, R-5, S-1 (C) P-3, Q-5, R-4, S-3 ... | Miscellaneous | B | 0 |
G-XEC-2013-11 | MATCH | 74 | Match the terminologies given in Column I with their relations listed in Column II: Column I: [P. domain wall, Q. Fickโs law, R. Matthiessenโs rule, S. Hall-Petch relation, T. Meissner effect] Column II: [1. superconductors, 2. mechanical properties, 3. ferromagnetic materials, 4. resistivity of impure metals, 5. dif... | Miscellaneous | C | 1 |
G-XEC-2017-16 | MCQS | 51 | Which of the following statement(s) is/are true: (i) All piezoelectric materials are necessarily ferroelectric (ii) All ferroelectric materials are necessarily piezoelectric (iii) All pyroelectric materials are necessarily piezoelectric (iv) All pyroelectric materials are necessarily ferroelectric (A) (i) and (ii) (B)... | Miscellaneous | B | 2 |
G-XEC-2019-1 | MCQS | 30 | On decreasing the objective aperture size in an optical microscope (A) the spherical aberration increases (B) the depth of field increases (C) the diffraction-limited resolution increases (D) the astigmatism increases | Miscellaneous | B | 3 |
G-XEC-2020-2 | MCQS | 46 | Smallest of minimum feature size that can be theoretically resolved in an optical microscope does NOT depend on: (A) Refractive index of the medium between the lens and the focal point (B) Intensityh of radiation (C) Wavelength of radiation (D) Numerical aperture of the objective lens | Miscellaneous | B | 4 |
G-META-14-13 | MCQS | 30 | In the trapezoidal rule for numerical integration of a function, the nature of approximation used for the function in each interval is (A) constant (B) linear (C) parabolic (D) cubic | Miscellaneous | B | 5 |
G-META-17-39 | NUM | 36 | A solution contains $10^(-3)$ M of $Fe^(+3)$ at 25ยฐC. The solubility product of $Fe(OH)_3$ is $10^(-39)$. Assuming activity equals concentration, the minimum pH at which $Fe^(+3)$ will precipitate as $Fe(OH)_3$ is?(answer up to two decimals places) | Miscellaneous | 1.80 TO 2.20 | 6 |
G-META-20-44 | NUM | 41 | Given, density of oxide is 6.5 $g.cm^(-3)$. A metal oxidizes at 1200K with a parabolic rate constant of 3* $10^(-6)g^(2).cm^(-4).s^(-1)$. Time taken(in seconds) for the oxide film to grow to a thickness of 2 ยตm is?(round off to two decimal places). | Miscellaneous | 0.54 TO 0.58 | 7 |
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