NCL Assistant Foreman Previous Question Paper | NCL Assistant Foreman Mechanical Previous Year Question Paper
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NCL Assistant Foreman exam held for 100 Marks, 70 marks are given for Technical Subjects, and 30 Marks for General Subjects. Only objective type questions are asked with no negative marking and the maximum duration of the test is 90 Minutes.
Essential Qualifying Marks for the UR, EWS candidates is 50 Marks, and 40 Marks for the Reserved Category with PwBD, ESM.
NCL Assistant Foreman Mechanical Trainee Paper 2020
| Sr. No. | Questions |
| 1 | In equilibrium situation, electric field inside a conductor is
(a) 1 (b) Infinite (c) Zero (d) Equal to outside of conductor |
| 2 | Which of the following correct?
(a) When a conductor is placed in an electric field, charges may be induced on the surface of a conductor (b) Electric potential is vector function (c) Work done in electric field depends on path connecting end points (d) All of the above |
| 3 | Choose the wrong statement about Electric flux?
(a) Flux is positive if the field lines come out of the surface (b) Flux is negative if the field lines come out of the surface (c) Flux is equal to the product of magnitude of the electric field and the projection of area perpendicular to the field (d) None of the above |
| 4 | Choose the correct options among following
(i) Coal and petroleum have been formed from biomass which has been subjected to various biological and geological processes (ii) Coal is the remains the trees, ferns and other plants that lived millions of years ago (iii)Coal is the remains of millions of tiny plants and animals (iv) Only coal not petroleum has been formed from biomass which has been subjected to various biological and geological processes (a) (i) & (ii) (b) (i), (ii) & (iii) (c) (ii), (iii) & (iv) (d) (i), (ii), (iii) & (iv) |
| 5 | Choose the correct option
(i) Changing magnetic flux give rise to an emf (ii) Flux change may be due to change in area through which flux is changing (iii) Flux change may be due to time dependent magnetic field (iv) Lenz’s law relates emf to rate of change of flux (a) (i), (ii) & (iv) (b) (i), (ii) & (iii) (c) (ii), (iii) & (iv) (d) (i), (ii), (iii) & (iv) |
| 6 | What is the poison’s ratio?
(a) Lateral strain/ longitudinal stress (b) Longitudinal stress/ lateral strain (c) Lateral strain/ longitudinal strain (d) Longitudinal strain/ lateral strain |
| 7 | What is shear modulus?
(a) Shear stress/ shear strain (b) Shear strain/ shear stress (c) Volumetric stress/ volumetric strain (d) Longitudinal stress/ longitudinal strain |
| 8 | If the bulk modulus and shear modulus are 1 and 2 respectively, what is the value of young’s modulus of elasticity?
(a) 3 (b) 3.1 (c) 3.6 (d) 3.9 |
| 9 | ‘Seebeck effect’ is due to conversion of which energy form?
(a) Thermal energy to Kinetic energy (b) Potential energy to Thermal energy (c) Thermal energy to Electrical energy (d) Electrical energy to Kinetic energy |
| 10 | Pelton wheel is which type of turbine?
(a) Impulse turbine (b) Active turbine (c) Kaplan type (d) None of the above |
| 11 | What is the viscosity of ideal fluid?
(a) 1 (b) Zero (c) 100 (d) Infinite |
| 12 | What is the approximate density of water?
(a) 1000 kg cubic mtr. (b) 100 kg cubic mtr. (c) 10 kg cubic mtr (d) 1 kg cubic mtr. |
| 13 | What is the unit of viscosity?
(a) Kg – sec per sq. mtr (b) N- Sec per sq. mtr (c) Dyne – sec per mtr (d) None of the above |
| 14 | In U tube manometer, what is the specific gravity of liquid whose pressure is to be measured in respect of liquid in the manometer?
(a) Specific gravity of liquid in the manometer is higher in comparison to specific gravity of liquid whose pressure is to be measured (b) Specific gravity of liquid in the manometer is lower in comparison to specific gravity of liquid whose pressure is to be measured (c) There should be no difference of specific gravity (d) None of the above |
| 15 | Which is NOT part of Hydraulic torque convertor?
(a) Turbine runner (b) Pump impeller (c) Guide vane (d) Gear and pinion |
| 16 | What is true about adiabatic process?
(a) Temperature remains constant (b) Volume remains constant (c) No heat transfer through system (d) Internal energy remains constant |
| 17 | Speed of sound is highest in which medium?
(a) Solid (b) Liquid (c) Gas (d) Same in all medium |
| 18 | What is NOT correct about ultrasonic waves?
(a) Frequency is very high about 20,000 Hz (b) Human ear can hear them (c) Wavelength of these waves is very low (d) None of the above |
| 19 | Which of these waves is a electromagnetic waves?
(a) Sound wave (b) Ultrasonic wave (c) Alpha wave (d) None of the above |
| 20 | Hygrometer is used for measurement of which of these?
(a) Relative Humidity (b) Latent heat (c) Air pressure (d) All of the above |
| 21 | Which of these is used as Controller rod in Nuclear reactor?
(a) Cadmium (b) Uranium (c) Plutonium (d) All of the above |
| 22 | What is the condition for neutral equilibrium of a floating body?
(a) Meta centre is above centre of gravity of body (b) Meta centre is below centre of gravity of body (c) Meta centre is at the centre of gravity of body (d) All of the above |
| 23 | What is the unit of rate of flow of discharge?
(a) Mtr. Sq./sec (b) Mtr. Cubic/sec (c) Litres X sec (d) All of the above |
| 24 | A hydraulic press has a ram of 30 cm diameter and a plunger of 4.5 cm diameter. What is the weight lifted by the hydraulic press when force applied at the plunger is 500 N?
(a) 66 Kilo Newton (b) 33 Kilo Newton (c) 44 Kilo Newton (d) 22 Kilo Newton |
| 25 | An oil of specific gravity 0.9 is contained in a vessel. At a point the height of oil is 40 meter. Find the corresponding height of water at the point
(a) 72 meter (b) 36 meter (c) 25 meter (d) 24 meter |
| 26 | As per first law of thermodynamics, energy of an isolated system is
(a) Zero (b) 1 (c) Constant (d) Infinite |
| 27 | Two litres of an ideal gas at a pressure of 10 atm expands isothermally into a vacuum until its total volume is 10 litres. How much heat is absorbed in the expansion?
(a) 10 Joule (b) 80 Joule (c) Zero (d) -80 Joule |
| 28 | Which of these is NOT correct statement?
(a) Entropy change at Equilibrium is zero (b) Entropy for a spontaneous process increases till it reaches maximum (c) Gaseous state is state of highest entropy (d) Decrease of regularity in structure would mean decrease in entropy |
| 29 | Which of these is NOT state function?
(a) Entropy (b) Internal energy (c) Enthalpy (d) Work |
| 30 | Which of these is NOT intensive property?
(a) Temperature (b) Heat capacity (c) Density (d) Pressure |
| 31 | In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. What is the change in internal energy for the process?
(a) 307 J (b) Zero (c) 1095 J (d) -1095 J |
| 32 | Which of these is NOT correct equation?
(a) G = H + TS (b) Cp – Cv = R (c) H = U + pV (d) None of the above |
| 33 | When two elements of a pair are in line contact, then pair is known as
(a) Lower pair (b) Higher pair (c) Medium pair (d) Linear pair |
| 34 | A pair is known as Kinematic pair if the relative motion between links of pair is
(a ) completely or successfully constrained (b) not constrained (c) not related with each other (d) none of the above |
| 35 | In Shaper machine, which of the mechanism is used?
(a) Slider Crank Mechanism (b) Rotary Mechanism (c) Oscillating Mechanism (d) Quick return mechanism |
| 36 | Heat engine converts heat to which form of energy?
(a) Potential energy (b) Electrical energy (c) Mechanical energy (d) None of the above |
| 37 | What is module of a gear?
(a) Pitch diameter/ number of teeth (b) Number of teeth/ pitch diameter (c) It is same as pitch of diameter (d) All of the above |
| 38 | What is the clearance of gears?
(a) Difference between dedendum of one gear and dedendum of mating gear (b) Difference between dedendum of one gear and addendum of mating gear (c) Both (a) & (b) (d) None of the above |
| 39 | Which of these is NOT a law of thermodynamics?
(a) Zeroth law of thermodynamics (b) First law of thermodynamics (c) Second law of thermodynamics (d) None of the above |
| 40 | Hacksaw blade cuts on the
(a) Forward stroke (b) Return stroke (c) Both forward and return stroke (d) All of the above |
| 41 | The flux commonly used on brazing is
(a) Zinc chloride (b) Ammonium chloride (c) Resin plus alcohol (d) Borax |
| 42 | A ‘two high rolling mill’ consists of two rolls which rotate
(a) At the same speed and in same direction (b) At the same speed but in opposite direction (c) At different speeds and in same direction (d) At different speeds and in opposite direction |
| 43 | A flywheel is used
(a) To limit the fluctuations of speed during each cycle (b) To control the mean speed of the engine (c) To maintain a constant speed (d) To come into act in when speed varies |
| 44 | The type of spring used to absorb shocks and vibrations in vehicles is
(a) Helical extension spring (b) Multi leaf spring (c) Spiral spring (d) Coned disk spring |
| 45 | Hot working
(a) Increases toughness and ductility (b) Increases surface finish (c) Increases hardness and strength (d) None of the above |
| 46 | Heat transfer in liquid and gases takes place by
(a) Conduction (b) Convection (c) Radiation (d) Conduction and convection |
| 47 | Cetane number of diesel fuel is a measure of
(a) Volatility (b) Viscosity (c) Ignition quality (d) Delay period |
| 48 | Compared with solid section, hollow section column has
(a) High buckling strength (b) Low buckling strength (c) Same buckling strength (d) None of the above |
| 49 | In 6 x 19 designation of wire rope, the numbers of 6 and 19 represent (a) Number of strands and diameter of wire rope (b) diameter and length of wire rope (c) Number of strands and number of wires in each strand (d) Number of wires in each strand and number of strand |
| 50 | An object is placed between two inclined mirrors. How many images will be formed if angle between mirrors is 30 degree?
(a) 10 (b) 11 (c) 12 (d) 20 |
| 51 | An open tank contains water up to a depth of 2m and above it an oil of specific gravity 0.9 for a depth of 1 m. What is the pressure at the bottom of tank?
(a) 28449 N per meter square (b) 18449 N per meter square (c) 8829 N per meter square (d) 19620 N per meter square |
| 52 | What is the position of centre of buoyancy for a wooden block of width 2.5 m and depth of 1.5 m, when it floats horizontally in water? The density of wooden block is 650 kg per cubic meter and its length 6 m?
(a) 0.659 m from base (b) 0.975 m from base (c) 0.487 m from base (d) 1.462 m from base |
| 53 | What is not basic characteristic of supercritical boilers?
(a) Higher plant efficiency (b) Heavy drum is required for separating water and steam (c) Short start up time (d) None of the above |
| 54 | In which of the following, milling machine table can be tilted in a vertical plane by providing swivel arrangement at knee?
(a) Omniversal milling machine (b) Hand milling machine (c) Universal milling machine (d) Vertical milling machine |
| 55 | Which of the following elements is NOT used as a roller in roller bearings?
(a) Cylindrical (b) Taper (c) Spherical (d) None of the above |
| 56 | The rated capacity of a power plant is 400 MW. The peak load on the plant is 350 MW. If the average load of plant is 280 MW, what is load factor?
(a) 0.8 (b) 0.7 (c) 1.2 (d) 1.3 |
| 57 | What is the critical temperature of water?
(a) 273 degree (b) 650 degree (c) 374 degree (d) 100 degree |
| 58 | The steam consumption in a turbine running at 400 rpm is 5 kg/s. The power developed is 4.4 KW. If the mean diameter is 96 cm, what is the peripheral velocity of blades?
(a) 200 m/sec (b) 150 m/sec (c) 20 m/sec (d) 60 m/sec |
| 59 | Which of these statements is correct for inelastic collision?
(a) The kinetic energy of a body during impact remains constant (b) The kinetic energy of a body before impact is equal to the kinetic energy of a body after impact (c) The kinetic energy of body before impact is less than the kinetic energy of a body after impact (d) The kinetic energy of body before impact is more than the kinetic energy of a body after impact |
| 60 | A bearing is designated by the number 410. It means that it is a bearing of
(a) Light series with bore diameter of 10 mm (b) Heavy series with bore diameter of 10 mm (c) Light series with bore diameter of 50 mm (d) Heavy series with bore diameter of 50 mm |
Answer –
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| c | a | b | a | b | c | a | c | c | a |
| 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| b | a | b | a | d | c | a | b | d | a |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| a | c | b | d | b | c | c | d | d | b |
| 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |
| a | a | b | a | d | c | a | b | d | A |
| 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 |
| d | b | a | b | a | b | d | a | c | b |
| 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |
| a | c | b | c | d | a | c | c | d | d |
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