SILVER OAK COLLEGE OF ENGINEERING & TECHNOLOGY

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1 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: MECHANICAL MEASUREMENT & METROLOGY ( ) DATE: TIME:11:00 am to 12:30 pm TOTAL MARKS:40 Q.1 (a) Explain errors and its classification. (b) Define the following terms. (i) Threshold (ii) Accuracy (iii) Linearity (iv) Hysteresis (v) Resolution Q.2 (a) Describe with sketch the construction and working of a micrometer. Explain how least count is found and reading is taken. [6] (b) Explain working principle of Linear Variable Differential Transformer [6] (LVDT) and advantages disadvantage of LVDT. (c) Explain any one Limit Gauges for measurement. [3] Q.2 (a) Explain the construction and use of sine bar with neat sketch [6] (b) Describe with neat sketch working of piezoelectric accelerometer. [6] (c) What are the angle gauges? Explain it with neat sketch. [3] Q.3 (a) Explain pitch measurement Methods. [6] (b) Describe the construction and working of Resistance Temperature Detector [6] (RTD) with its advantages and disadvantages. (c) State and explain three laws of Thermocouple. [3] Q.3 (a) Describe with sketch the construction and use of Gear Tooth Vernier Caliper. Derive equation for measurement. [6] (b) Explain Total Radiation Pyrometer. [6] (c) Differentiate between Resistance thermometer and thermister. [3] ****************************************************************************************************

2 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: Engineering Economics and Management ( ) DATE: TIME: 11:00 am to 12:30 pm TOTAL MARKS: 40 Q.1 (a) Discuss the levels of management. [04] (b) Differentiate between Micro-economics and Macro-economics. [03] (c) List down the principles of organizing. [03] Q.2 (a) Explain the determinants of demand. [05] (b) Explain Maslow s need hierarchy theory with the help of a diagram. [05] (c) How is the function of staffing important in management? [05] Q.2 (a) Define elasticity. Explain price elasticity of demand in detail. [05] (b) Explain the following concepts of cost: 1. Opportunity cost 2. Fixed and variable cost [05] 3. Average cost (c) Explain the functions of financial management. [05] Q.3 (a) Define marketing management? Explain marketing mix (4Ps) in detail. [08] (b) What is production? Discuss the factors of production in detail. [07] Q.3 (a) Write short notes on: 1. Matrix Organization Structure [08] 2. Line and Staff Organization Structure (b) Explain Henry Fayol s principles of administrative management. [07] ****************************************************************************************************

3 B.E. Semester- (IV) MID SEMESTER EXAMINATION Summer 2015 SUBJECT: Complex Variables And Numerical Methods ( ) Date: TIME:11:00A.M. to 12:45P.M. Total Marks: 40 Q.1 (a) Find real root of x 3 +x-1= 0 (upto 3 decimal places) using Newton-Raphson Method. 3 (b) Evaluate dx 1 0 x with n=6 by using Simpson s 3/8 rule and hence calculate log2. Q.2 (a) Find the real root of xe x -2 = 0 which lies between 0.8 and 0.9 up to 3 decimal places using Regula Falsi method. (b) Solve the following system of equations by using Gauss-Seidel method correct up to two decimal places: 20x+2y+z= 30, x-40y+3z = -75, 2x - y+10z=30. (c) 6 2 Evaluate the integral ( 1 x 2 ) 3 / dx by Gaussian formula for n =3. 2 Q.2 (a) Find the real root of equation x 3 +4x 2-10=0 using Bisection Method. (b) Solve the following system of equation using Gauss Elimination method with Partial Pivoting: x+y +z =7, 3x+3y+4z = 24, 2x +y+3z= (c) Evaluate 2 x 1 dx 1 0 using four strips by simpson s 3 1 rule. Q.3 (a) What is analytic function? Show that 3 (b) Show that 3 2 f z z is analytic everywhere. u x, y 2x x 3xy is harmonic and Find a harmonic conjugate v ( x, y). (c) 1 dy Use the Euler method to find y (1.4) given that xy 2, y(1) 1 dx. Q.3 (a) 2 3 Evaluate dominant eigenvalue of matrix using power method. 5 4 (b) 2 Solve the equation z 5 i z 8 i 0 (c) Apply Runge-Kutta method of fourth order to calculate y (0.2) given y y ( 0) 1 taking h=0.1. 2, x y ********************************************************************************

4 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: FLUID MECHANICS ( ) DATE: TIME: 11:00 am to 12:30 pm TOTAL MARKS: 40 Q.1 (a) Define the following: 1. Streak line 2. Stream line 3. Path line (b) The pressure difference Δp in a pipe of diameter D and length l due to viscous flow depends on the velocity V, viscosity µ and density ρ. Using Buckingham s π- theorem, obtain an expression for Δp. [3] [7] Q.2 (a) Define: Density, Cohesion, Geometric Similarity, Specific Gravity, Specific Volume. (b) Calculate the dynamic viscosity of oil, which is used for lubrication between a rectangular plate of size 1.0 m 0.8 m and an inclined plane with angle of inclination 25. The mass of the rectangular plate is 20 kg and it slides down the inclined plane with a uniform velocity of 0.5 m/s. the thickness of oil film is 2 mm. (c) A 1:15 scale model of an airplane, the model tested in water (density 998 Kg/m 3 and viscosity 0.02 poise). The pressure drop in model is 6 KN/m 2. The density and viscosity of air 1.23 Kg/m 3 and poise respectively. Calculate pressure drop in the prototype. Q.2 (a) Derive Pascal s law using proper notations? (b) Define continuum and capillary effect. Derive expression for capillary rise for a tube? (c) In a geometrically similar model of spillway the discharge per meter length and force are 1/6 m 3 /s and 2 N. if the scale of the model is 1/36. Find the discharge per meter length of the prototype. Q.3 (a) Velocity components of a fluid flow are given as u=(6xy 2 + t), v= (3yz+t 2 +5), w=(z+3ty) where x, y, z are given in meters and time t in seconds. Determine [6]

5 velocity vector at point P (4,1,2) at time t=4s. Also determine the magnitude of velocity and acceleration of the flow for given location and time. (b) Derive Euler s equation along a stream line and from it obtain the Bernoulli s equation. Clearly mention the assumptions used. (c) Define the following : 1. Uniform and non uniform flow 2. Stream tube 3. Laminar and Turbulent flow 4. Steady and unsteady flow Q.3 (a) Derive the continuity equation for three dimensional Cartesian coordinates. Simplify it for two dimensional, steady and incompressible flows. (b) A horizontal venturi meter of 200mm 100mm is used to measure the discharge of an oil of specific gravity The mercury manometer is used for the purpose. If the discharge is 100 liters per second and if the coefficient of discharge of the venturi meter is 0.97, find the difference of mercury level in between two limbs of manometer. (c) Differentiate between: 1. Eulerian approach and Lagrangian approach 2.Rotational Flow and Irrotational flow [4] [6] [4] ****************************************************************************************************

6 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 MACHINE DESIGN & INDUSTRIAL DRAFTING ( ) DATE: 13/03/2015 TIME: 11:00AM TO 12:45PM TOTAL MARKS: 40 Q.1 (a) Define fit. Describe various types of fits in brief. [3] (b) Explain hole basis system and shaft basis system of fits. [3] (c) How surface roughness is calculated using formulas? Indicate [4] machining symbol showing direction of lay in terms of geometric tolerances. Q.2 (a) Square key is stronger against crushing than rectangular key. Justify [05] the statement. (b) What do you mean by couplings? How couplings are classified? [04] (c) A steel spindle transmits 4kW at 800 rpm. The angular deflection [06] should not exceed 0.25 per meter of the spindle. If the modulus of rigidity for the material of the spindle is N/mm 2. Find the diameter of spindle and shear stress induced in the spindle. Q.2 (a) Explain different types of keys with its applications. [05] (b) Explain the Design of muff coupling. [03] (c) A belt driven C.I pulley of 0.9 m diameter overhangs the bearing by 0.2 [07] m as shown in figure-1. The pulley is driven from the bottom by a belt. The angles of lap and tension on tight side are 180 and 2600 N respectively. The weight of pulley is 600 N. Assume co-efficient of friction between pulley and belt is Shaft is made up of 30C8. σ yt = 400 N/mm², σ ut = 500 N/mm² Determine the shaft diameter according to ASME code. Take Ks=1.0, Kb=1.5.

7 Figure-1 Q.3 (a) Define theories of failures. (b) It is required to design a cotter joint to connect two steel rods of equal [10] diameter. Each rod is subjected to an axial tensile load of 50 kn. The permissible stresses are 67 MPa in tension, 34 MPa in shear and 134 Mpa in crushing for all parts. Calculate following dimension, i) Diameter of spigot, ii) thickness of cotter, iii) Diameter of socket collar, iv) Thickness of socket collar, v) Width of cotter. Q.3 (a) A bell crank lever is to be designed to raise a load of 5kN at the short [7] arm end. The arm lengths are 150mm and 500mm. The permissible stresses for lever pin materials in shear and tension are 60 MPa and 90 Mpa respectively. The bearing pressure intensity on the pin is to be limited to 12 MPa. Assume the lever cross-section as t 4t and length of fulcrum pin as 1.25 times pin diameter. Design the lever from above data. (b) Design a knuckle joint to connect two mild steel bars under a tensile [8] load of 25 kn. The allowable stresses are 65 MPa in tension, 50 MPa in shear and 83 MPa in crushing. ****************************************************************************************************

8 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: MANUFACTURING PROCESSES-II ( ) DATE: TIME: 11:00AM TO 12:30PM TOTAL MARKS: 40 Q.1 (a) Define following terms 1. Mould 2. Cavity 3. Pattern 4. Chaplets 5. Core print 6. Break Even Point (b) What type of allowances is generally incorporated into a casting pattern? Discuss shrinkage and distortion allowances. (c) Determine the permeability number if 2000 cc of air takes 80 sec. to pass through a standard specimen (4.45cm height and 4.45cm dia) and the manometer indicate an air pressure reading of 5 gm/cm 2. (3) (4) (3) Q.2 (a) Explain with neat sketches types of gating systems used in casting process. (5) (b) Explain investment casting process. (7) (c) Explain the properties of moldings sand (any two). (3) Q.2 (a) Describe casting defects stating their causes and remedies. (5) (b) Explain die casting process. (7) (c) Draw the neat sketch of sweep and match plate pattern. (3) Q.3 (a) Explain the principle of rolling process. Classify rolling mill and explain any (6) one in detail. (b) Write short note on wire drawing. (5) (c) Define: slab, bloom, billet and ingot. (4) Q.3 (a) Explain with sketch the difference between direct and indirect extrusion. (5) (b) Differentiate between hot working and cold working. (6) (c) Explain elastic and plastic deformation process briefly. (4) ******************************ALL THE BEST*********************************

9 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: ENGINEERING THERMODYNAMICS ( ) DATE: TIME: 11:00 am to 12:30 pm TOTAL MARKS: 40 Q.1 (a) Define Thermodynamic system. Also explain different thermodynamic [7] systems with appropriate examples. (b) Differentiate between Intensive and Extensive properties of system. [3] Q.2 (a) Prove that Energy A Property of System [4] (b) In a steam power cycle, the dry and saturated steam is supplied at 15 bar. If [6] the Condenser pressure is 0.4 bar, calculate the Carnot and Rankine cycle Efficiencies neglecting the pump work. (c) Write comparison of Carnot and Rankine cycle. Q.2 (a) Explain following terms: Flow work, critical point, triple point. [3] (b) The mass flow rate of steam into a steam turbine is 1.5Kg/s and heat [6] transfer from the turbine is 8.5KW. The steam is entering in the turbine at the pressure of 2 MPa, temperature 350 C, velocity 50m/s, elevation 6m and is leaving the turbine at a pressure of 0.1 MPa, quality of 100% velocity of 200m/s, elevation of 3m. Determine the power output of turbine. (c) Explain P-V and T-s diagram for Diesel cycle. Derive the formula for the [6] efficiency of the cycle. Q.3 (a) Write steady flow energy equation in case of Nozzle, Diffuser and Turbine. [6] (b) In a steam power station, steam flows steadily through a 0.2 m diameter pipeline from the boiler to the turbine. At the boiler end, the steam conditions are found to be: p=4 MPa, t= 400 deg C, h= kj/kg and v= m3/kg. At the turbine end the condition are found to be: p= 3.5 MPa, t=392 deg C, h= kj/kg & v= m3/kg. There is a heat loss of 8.5 kj/kg from the pipe line. Calculate the steam flow rate. (c) Prove that Energy is a point function of a system undergoing change of [4] state.

10 Q.3 (a) What is meant by thermodynamic equilibrium? How goes it differ from thermal equilibrium. (b) Carnot cycle is not practical. Justify. [3] (c) A Carnot engine receives 4000 KJ as heat addition at 337 c and rejects [7] energy at triple point of water. Calculate (1) thermal efficiency (2) The net work output in KJ If the efficiency of an irreversible engine is 70 % of Carnot engine. Find the % change in heat rejected for the same input and fluid temperature. ****************************************************************************************************

11 BE - SEMESTER IV MID SEMESTER EXAMINATION SUMMER 2015 SUBJECT: KINEMATIC OF MACHINES ( ) DATE: TIME: 11:00 am to 12:30 pm TOTAL MARKS: 40 Q.1 (a) Classify cams and followers in detail. [4] (b) Define: [3] i) Contact Ratio ii) Module iii) Circular Pitch (c) Explain the difference between interference and undercut with neat sketch. [3] Q.2 (a) Define the following terms: [7] 1. Link 2. Locked Chain 3. Higher Pair 4. Ternary Joint 5. Degrees of freedom 6. Constrained Motion 7. Quaternary Link. (b) Define the following terms as applied to cam with a neat sketch :- (a)base circle, (b) Pitch circle, (c) Pressure angle, and (d) Trace Point (e) Pitch Curve. (c) Explain the following terms [3] (1) Resistant body (2) D.O.F (3) link Q.2 (a) Sketch and describe the working of Beam Engine. (b) Explain types of motions [3] (1) Completely constrained motion; (2) Incompletely constrained motion; (3) Successfully constrained motion (c) A cam is to give the following motion to a knife-edged follower: [7] 1. Outstroke during 60 of cam rotation; 2. Dwell for the next 30 of cam rotation; 3. Return stroke during next 60 of cam rotation and 4. Dwell for the remaining 210 of cam rotation. The stroke of the follower is 40 mm and the minimum radius of the cam is 50 mm. The follower moves with uniform velocity during both the outstroke and return strokes. Draw the profile of the cam when the axis of the follower passes through the axis of the cam shaft,

12 Q.3 (a) Explain Compound gear train with neat sketch in detail. [6] (b) An epicyclic gear train as shown in fig. has a sun wheel S of 30 teeth and two [9] planet wheels P of 50 teeth. The planet wheel mesh with the internal teeth of a fixed annular A. The driving shaft carrying the sun wheel transmits 4 KW at 300 rpm. The driven shaft is connected to an arm which carries the planet wheel. Determine the speed of the driven shaft. Q.3 (a) Derive an Expression for Length of Path of contact of Gears. [7] (b) Determine the minimum number of teeth required on a pinion, in order to [8] avoid interference which is to gear with, 1. A wheel to give a gear ratio of 3 to 1; and 2. An equal wheel. The pressure angle is 20 and a standard addendum of 1 module for the wheel may be assumed. ****************************************************************************************************

AE302,ME302,DAE14,DME14

AE302,ME302,DAE14,DME14 III SEMESTER DIPLOMA EXAMINATION, JANUARY-2013 MANUFACTURING TECHNOLOGY-I Time: 3 Hours Max. Marks: 75 GROUP A : Answer any three questions. (Question No. 1 is compulsory) Q.1 What