1. Home
  2. All Previous Year Questions List
S.No Question Option A Option B Option C Option D Answer Solution Comments Status Action
1 The first law of thermodynamics has a concern with the conservation of : energy pressure momentum mass a Comments Active
2 While stopping a vehicle moving the down the hill, the brakes must absorb: potential energy of the vehicle kinetic energy of the vehicle kinetic and potential energy of the vehicle rotational energy of wheels c Comments Active
3 “ It is impossible for any system to operate in a way that entropy is destroyed’. This statement is from: Planck statement of the second law of thermodynamics Clarian statement of thermodynamics Entropy statement of the second law of thermodynamics Entropy statement of the third law of thermodynamics c Comments Active
4 In Mohr’s circle, the maximum shear stress occurs on a plane and is indicated with an angle 2. What is the value of that stress? \(θ\) \(45^{0}or 135^{0}\) \(90^{0}or 270^{0}\) \(45^{0}or-45^{0}\) \(0^{0}or 180^{0}\) b Comments Active
5 In a reciprocating engine, the length of connecting rod and radius of the crank are equal. In this configuration, the ratio of maximum primary and secondary unbalanced reciprocating forces is : 1 4 2 0.5 a Comments Active
6 In toothed gearing, an imaginary circle that provides a pure rolling action of two gears is called: pitch circle dedendum circle clearance circle addendum circle a Comments Active
7 The value of modulus of elasticity of metals under tension: decreases with the temperature increases with the temperature increases squarely with the temperature is not dependent on the temperature d Comments Active
8 In a composite or concentric spring, the ratio of loads shared by each spring is equal to: (ratio of solid strength)2 (ratio of wire diameter)2 (ratio of wire stiffness)2 (ratio of spring stiffness)2 b Comments Active
9 An aluminium bar coefficient of thermal expansion and E = 40 GPa is fixed between the two rigid supports and is heated through 50 K. The stress developed in this bar is: \(25×10^{-6}/K\) 20 kPa 80 MPa 50 kPa 50 MPa d Comments Active
10 To regulate the mean speed of an engine against the variation of external loads, the device used is : speedometer governor brake drum flywheel b Comments Active
11 In the vibration isolation system, if , then the phase difference between the transmitted force and the disturbing force is : \(\frac{ω}{ω_{n}}>1\) 900 00 1800 2700 c Comments Active
12 The perpendicular distance between the centre lines of successive rows of rivets is known as: diagonal pitch rivet pitch back pitch marginal pitch c Comments Active
13 The bending moment at the centre of a simply supported beam of span L and subjected to a uniformly distributed load W is: \(\frac{WL^{2}}{4}\) \(\frac{W^{2}L}{2}\) WL \(\frac{WL^{2}}{8}\) d Comments Active
14 The LMTD of a parallel flow heat exchanger unit, compared to counter flow heat exchanger , is: same high low not comparable c Comments Active
15 A component is accelerated at the rate of 2 m/s2 from the rest. The distance covered by the component in 10 sec is: 200 m 10 m 100 m 20 m c Comments Active
16 The initial tension in bolts Pi for making the joint fluid tight , using bolts of diameter d, is : \(P_{i}=2840 d\) \(P_{i}=4120 d\) \(P_{i}=8240 d\) \(P_{i}=1420 d\) a Comments Active
17 Which spiral casing of a Francis reaction turbine has: uniformly varying cross-sectional area and is maximum at the exit. uniformly varying cross-sectional area and is maximum at the entrance uniformly varying cross-sectional non-varying cross-sectional area and is constant throughout b Comments Active
18 Which standard cycle is referred to evaluate the performance of a steam power cycle? Air standard cycle Carnot cycle Rankine cycle Constant pressure cycle c Comments Active
19 In the electro-polishing process, the surface material is removed by the mechanism of: erosion corrosion abrasion diffusion d Comments Active
20 One of the significant advantages of cold forming compared to hot working is : better accuracy achieved more preheating needed less work required for the process less strength due to strain hardening a Comments Active
21 A rectangular plate is submerged vertically in a flui(d) The centre of pressure of the fluid on the surface of the plate is : at the centre of gravity of the plate below the centre of gravity of the plate above the centre of gravity of the plate at the bottom of the plate b Comments Active
22 According to maximum shear stress theory, the maximum shear stress for a case of combined bending and torsion for shafts is : \(τ_{max}=\frac{1}{E}σb2+4τ^{2}\) \(τ_{max}=\frac{1}{2}σb2+τ^{2}\) \(τ_{max}=\frac{1}{2}σb2+4τ^{2}\) \(τ_{max}=\frac{E}{2v}2σb2+τ^{2}\) c Comments Active
23 The kinetic energy of a body of mass (m) and velocity (v) is equal to: mv/2 mv2 mv mv2/2 d Comments Active
24 According to Wein’s law of radiation , the wavelength corresponding to the maximum energy is : inversely proportional to the absolute temperature of hot body directly proportional to the absolute temperature of hot body directly proportional to temperature difference in the body inversely proportional to temperature difference in the body a Comments Active
25 The isothermal compressibility of a substance is given by the expression: \(K_{T}=(\frac{dv}{dp})_{T}\) \(K_{T}=\frac{1}{v}(\frac{dv}{dp})_{T}\) \(K_{T}=-\frac{1}{v}(\frac{dv}{dp})_{T}\) \(K_{T}=-(\frac{dv}{dp})_{T}\) c Comments Active
26 According to Euler’s theory for buckling of columns, the value of the end fixity coefficient for the case-both ends fixed in the Crippling load equation is: 4 2 0.25 1 a Comments Active
27 A wall of a furnace 150 mm thick and area 100 sq.m has a thermal conductivity of 1.5 W/mK. The heat loss through the wall for a temperature difference of 50 K is : 5 kW 500 W 0.5 W 50 kW d Comments Active
28 The cutting conditions identified in the machining process for a single –point tool operation are tool temperature, coolant and tool material speed of work, feed and depth of cut speed of work , feed and cutting tool material work and tool material and coolant used b Comments Active
29 A hydrodynamic boundary layer thickness is the distance from the surface to where the velocity is : equal to local external velocity equal to 99 percent of the local external velocity more than local external velocity equal to zero local external velocity b Comments Active
30 A zone that consists of a mixture of filler metal and base metal that have completely melted in the welding is called: fusion zone weld interface hot zone heat-affected zone a Comments Active
31 A disc that consists of a mixture of filler metal and base metal that have completely melted in the welding is called: Radial friction clutch Self-disengage clutch centrifugal clutch axial friction clutch d Comments Active
32 A simply supported beam AB carries a vertical load at a point C such that lengths AC < C(B) The maximum deflection of the beam occurs at: between points A and C Point C Point B between points C and B d Comments Active
33 If two forces and acting simultaneously on a particle at an angle are represented in magnitude and direction by the two adjacent sides of a parallelogram, then the direction of resultant with force is given by: \(F_{1}\) \(F_{2}\) \(θ\) \(F_{1}\) \(tan^{-1}(F_{1}cosθ/(F_{1}+F_{2}cosθ ) \) \(tan^{-1}(F_{2}sinθ/(F_{2}+F_{1}cosθ ) \) \(tan^{-1}(F_{2}sinθ/(F_{1}+F_{2}cosθ ) \) \(tan^{-1}(F_{1}sinθ/(F_{1}+F_{2}cosθ ) \) c Comments Active
34 The functions of a draft tube connected to a turbine is to: physically hold and support the turbine convert pressure energy into kinetic energy in the tube convert kinetic energy into pressure energy in the tube decrease the total pressure head c Comments Active
35 The forces whose lines of action lie on the same line are known as : non-coplanar forces concurrent forces collinear forces non-concurrent forces c Comments Active
36 A type of bond that makes a material very strong such as diamond or very weak such as bismuth is called: Metallic bond Covalent bond Vander Walls bond Ionic bond b Comments Active
37 The power –specific speed of an impulse turbine is in the range of: \(N_{sp}\) 1-10 101-150 151-200 11-100 a Comments Active
38 Which material has the highest value of Young’s Modulus among the following? Glass ceramic Silicon Carbide Boron Carbide Tungsten Carbide d Comments Active
39 A real fluid is the one that is different from the ideal fluid in respect of: mass density gravity viscosity d Comments Active
40 The air standard efficiency of a constant volume air cycle depends on: compression ratio sink temperature only source temperature only average cycle pressure a Comments Active
41 The critical speed of a rotating shaft can be determined from the natural frequency of the same shaft vibrating in : forced torsional vibrations transverse free vibrations longitudinal free vibrations torsional free vibrations b Comments Active
42 In the gyroscopic actions of rotating bodies, the plane of spinning and plane of precision are: perpendicular to each other inclined to each other parallel and distinct same a Comments Active
43 In a centrifugal compressor, the work done by an impeller per kg of air is given by the product of tangential force and distance travelle(d) This work is known as : isentropic work euler work actual work static work b Comments Active
44 Cast iron pipes of length many times larger than the diameter are manufactured by the casting process. Which method is preferred? Sand Casting method
b . Die casting method		 Centrifugal casting method Lost wax method c Comments Active
45 The line of action of a tensile load is away from the centroidal axis of the component. Then this load will produce: tensile and shear stresses bending and shear stresses shear and bending stresses tensile and bending stresses d Comments Active
46 The failure or yield of a component occurs at a point when the maximum shear stress in the biaxial stress system reaches a value equal to the shear stress at the yield point in a simple tension test. This theory is known as. Rankine’s theory Guest’s Theory Haigh’s theory Saint Venant’s Theory b Comments Active
47 The strength of a single transverse fillet weld joint per unit length for the thickness of plate t and allowable stress for the weld material is : \(σ_{t}\) P = 0.9 \(σ_{t}\) \(P=1.414 tσ_{t}\) \(P=0.707tσ_{t}\) \(P=0.45 tσ_{t}\) c Comments Active
48 A gas in a container under a pressure of 15 Pa, temperature and a volume of 5 litres is compressed with the hyperbolic process to 3 litres. The final pressure of the gas is : \(20℃\) 15 Pa 25 Pa 125 Pa 100 Pa b Comments Active
49 The Liquid Shrinkage Allowance used while designing casting pattern on reduction in volume changes: in the mold upon cooling from liquid state to solid state of metal due to ramming in the riser volume b Comments Active
50 A thin cylinder of diameter 0.5mm and thickness of 5mm is subjected to an internal pressure of 2 MP(a) The circumferential and longitudinal stresses , respectively, in the cylinder are: 100 kPa, 50 kPa 25 kPa, 50 kPa 50 kPa, 100 kPa 50 kPa, 25 kPa a Comments Active
51 An inward flow reaction turbine has a tangential velocity of runner as 24 m/s and velocity of a whirl as 9.81 m/s. The hydraulic efficiency of this turbine for a total head of water of 40 m is : 60 percent 24.53 percent 30 percent 40.88 percent a Comments Active
52 What are the dimensions of surface tension ? \(M^{0}LT^{-2}\) \(ML^{0}T^{-2}\) \(ML^{0}T^{-1}\) \(MLT^{-1}\) b Comments Active
53 The actual capacity of an air compressor is expressed as: compressed air delivery by the pump per hour swept volume of cylinder per minute actual free air delivered per minute clearance volume of the pump per minute c Comments Active
54 A shaft is vibrating under the free vibration condition. The stresses developed in this shaft are in bending stresses. Which type of vibrations the shaft is subjected to? Torsional vibrations Longitudinal free vibrations Transverse vibrations Forced Longitudinal vibrations c Comments Active
55 Offset yield stress is determined by setting a line parallel to its initial linear region by a standard strain of: 0.02 percent 2 percent 0.2 percent 1 percent c Comments Active
56 A piezometer is used for measuring the gauge pressure inside a pipe carrying water. If the rise in the column of the meter is 30 cm, the fluid pressure inside the pipe is: 30 kN/m2 0.293 kN/m2 333 kN/m2 2.943 kN/m2 d Comments Active
57 A bar of cross-sectional area of 25 mm2 and length 50 mm is subject to tensile loading. The initial slope of the load-extension curve is 110 kN/mm. Then the modulus of elasticity of the bar material is : 55 kN//mm2 22000 kN/mm2 11000 kN/mm2 220 kN/mm2 d Comments Active
58 The approximate value of modulus of elasticity for a brass material is : 200 GPa 150 GPa 80 GPa 240 GPa c Comments Active
59 The ability of a material to conduct thermal energy relative to its ability to store thermal energy is called: thermal capacity thermal diffusivity thermal resistivity thermal conductivity b Comments Active
60 In a thermodynamic system, the work done on the system is 10 kJ, while the internal energy has increased by 40 kJ. Then the heat supplied to the system is : 60 kJ 40 kJ 30 kJ 50 kJAnswer: c Comments Active
61 “If a force acts at any point on a rigid body, it may also be considered to act at any other point on its line of action, provided this point is rigidly connected with the body”. This is the principle of: composition of forces transmissibility of forces parallelogram law of forces physical independence of forces b Comments Active
62 A circular shaft of diameter 20 mm is used to transmit power and the shear stress in the materials is limited to 40 MPa. This shaft can transmit a torque of: kNmm \(20Ï€\) kNmm \(40Ï€ \) kNmm \(20Ï€ \) kNmm \(40Ï€ \) a Comments Active
63 The instantaneous value of stress required to continue deforming the material in metal forming is known as : bulk stress ultimate stress engineering stress flow stress d Comments Active
64 The efficiency of a Rankine cycle can be improved by : increasing the pressure of the steam decreasing the pressure of the steam increasing the wetness of the steam decreasing the temperature of the steam a Comments Active
65 The minimum and maximum speed values , respectively of a flywheel are 200 rpm and 400 rpm. Then the coefficient of fluctuation of speed is: 0.66 2.0 0.5 1.0 a Comments Active
66 The resistance per unit area to the deformation set up by the body for external forces is called: stress resilience modulus stiffness a Comments Active
67 The ratio of the maximum displacement of vibrating system in the forced vibration situation to its deflection due to the static force is called: dynamic magnifier damping factor stiffness logarithmic decrement factor a Comments Active
68 A body is subjected to the mutually perpendicular strains and then the centre of the Mohr’s circle for the strain from the origin is: \(ε_{x}\) \(ε_{y}; \) \((ε_{x}-ε_{y})\) \((ε_{x}-ε_{y})/2\) \((ε_{x}+ε_{y})\) \((ε_{x}+ε_{y})/2\) d Comments Active
69 Thermodynamics intensive properties are those values are: dependent on the flow dependent on the size independent of the flow independent of the size d Comments Active
70 ‘It is impossible for any system to operate in such a way that the sole result would be an energy transfer by heat from a cooler to a hotter body’. This statement is known as: Entropy statement Clausius statement Clarian statement Kelvin-Planck statement b Comments Active
71 The temperature at which the transformation of ice into water and steam at constant pressure occurs is called: vapourisation temperature latent heat temperature saturation temperature melting temperature c Comments Active
72 The radiation transfer occurs efficiently in: gas solid vacuum liquid c Comments Active
73 The shear force in a cantilever beam subjected to a load P at its free end is : constant throughout the beam and is equal to P constant throughout the beam and is equal to –P –P at the fixed end and zero at the free end zero at the fixed end and –P at the free end b Comments Active
74 The coefficient of velocity is the ratio between the actual velocity of a jet of liquid and the theoretical velocity of a jet. The actual velocity of the liquid is measured at: vena-contracta exit of the orifice mid of the orifice entrance of the orifice a Comments Active
75 Two different metallic walls of the same thickness and cross-sectional area have thermal conductivities in the ratio 1:3. If the ratio of temperature drop across the walls is 3:5, what is the ratio of heat flow in these walls? 3:5 5:5 5:1 1:5 d Comments Active
76 A steel bar of thickness 8 mm is bent into a circular arc of radius 5m. The bending stress induced in this bar having E = 200 GPa is : 80 GPa 160 MPa 50 MPa 80 MPa b Comments Active
77 The endurance limit for a given stress range R can be determined by using the endurance limit for completely reversed stresses with the equation: \(σe'=\frac{σ_{e}}{2-R}\) \(σe'=\frac{3σ_{e}}{2-R}V\) \(σe'=\frac{σ_{e}}{3-R}\) \(σe'=\frac{2σ_{e}}{3-R}\) b Comments Active
78 Two bodies at different temperatures communicate thermally with a finite temperature difference between them. The process of heat transfer is : irreversible cyclic and reversible reversible cyclic a Comments Active
79 In the equation of motion of fluids , the force due to compressibility is negligible .Such equation of motion is known as: Reynold’s equations of motion Naviers-Stokes Equation of Motion Gant’s Equation of Motion Euler’s equation of Motion a Comments Active
80 A frame that is made up of members just sufficient to keep it in equilibrium is known as: perfect frame redundant frame deficient frame imperfect frame a Comments Active
81 The ‘thermal arrest’ a part of the cooling curve in the casting process is: the solidification of metal using latent heat of fusion the immediate cooling of sand mould the blocking of cooling of metal by the riser the blocking of cooling of metal by the sand mould a Comments Active
82 A refrigeration system based on the Carnot cycle operates between the two temperatures
-3 and . The coefficient of performance of the refrigeration is: \(℃ \) \(+6℃\)		 30 90 1 3 a Comments Active
83 The solidification time, Ts, required for casting during cooling, is proportional to: (surface area/volume)2 (volume/surface area)2 surface area (surface area)2 b Comments Active
84 The continuity equation for a fluid flowing through the pipe at all the cross-section is based on the principle of : conservation of mass conservation of kinetic energy conservation of potential energy conservation of momentum a Comments Active
85 A single-cylinder diesel engine has a stroke volume of 800 c(c) During operation, its compression ratio is 21. The clearance volume of this engine cylinder is: 80 cc 38.1 cc 76.2 cc 40 cc d Comments Active