Important RGPV Question,
BT-203, Basic Mechanical Engineering, 1st Year
UNIT-1 Materials
UNIT-2 Measurement & Production Engineering
UNIT-3 Fluids
UNIT-4 Thermodynamics & Steam Engineering
UNIT-5 Reciprocating Machines
UNIT - I
Materials
Q. 1) Explain the methods to measure the hardness of materials. (RGPV Dec.2022)
Q. 2) Classify engineering materials. What of you mean by alloys ? Write some applications of alloys. (RGPV Dec.2022)
Q. 3) A rod 200 cm long and of diameter 3.0 cm is subjected to an axial pull of 30kN. If the Young’s modulus of the material of the rod is 2 x 105 N/mm2, determine
i) Stress
ii) Strain
iii) Elongation of the rod (RGPV Dec.2022)
Q. 4) Enlist important mechanical properties of engineering materials. Define any three with suitable examples.
Or
Explain the various mechanical properties of material. (RGPV Jun 2022)
Q. 5) Explain the experimental set up of tensile testing of steel. Also compare stress-strain diagrams of ductile and brittle materials. (RGPV Jun 2022)
Q. 6) Find the young’s modulus of a brass rod of diameter 25 mm and length 250 mm which is subjected to a tensile load of 50kN when the extension of the is equal to 0.3 mm. (RGPV Jun 2022, RGPV Dec 2016, RGPV Dec 2017)
Q. 7) Define following mechanical properties i) Tensile strength ii) Hardness iii) Ductility iv) Toughness (RGPV Jun 2020, RGPV May 2018, RGPV May 2019)
Q. 8) What is composition of Carbon steel ? Give its applications. (RGPV Jun 2020)
Q. 9) What is steel ? Discuss some of the different types of steel with their applications. Give its application. (RGPV Dec 2020, RGPV May 2019, RGPV Jun 2015)
Q. 10) What is hardness ? How to measure the hardness of a material ? Discuss in brief.
Or
Define hardness and explain the Brinell hardness test.
Or
Define hardness. Explain testing method in brief
Or
Define hardness and explain the testing procedure for determining hardness of engineering material. (RGPV Dec 2020, RGPV Dec 2017, RGPV May2018, RGPV Nov 2019, RGPV Nov 2018, RGPV Jun 2016, RGPV Dec 2014)
Q. 11) Discuss basic classification of Engineering materials.
Or
Give a brief classification of engineering materials.
Or
Give the broad classification of engineering materials. (RGPV Jun 2020, RGPV Nov 2019, RGPV Nov 2018, RGPV Dec 2016)
Q. 12) Explain the iron carbon diagram in brief. (RGPV Dec 2020)
Q. 13) Write short notes on Sine bar. (RGPV Jun 2020)
Q. 14) Compare properties of ferrous and non-ferrous metals. (RGPV Dec 2015)
Q. 15) What is cast iron ? (RGPV Dec 2016)
Q. 16) Give the composition, properties and uses of wrought iron. (RGPV Jun 2010)
Q. 17) Explain the steel and iron-carbon diagram.
Or
Explain the iron-carbon diagram.
Or
Draw and iron-carbon diagram for steel.
Or
Sketch the iron-carbon equilibrium diagram and point out its salient feature. (RGPV Jun 2016, RGPV Dec 2014, RGPV Nov 2018, RGPV Dec 2015)
Q. 18) State and explain Hooke’s law and modulus of elasticity.
Or
Explain the Hooke’s law. (RGPV Jun 2015, RGPV Dec 2016)
Q. 19) Draw and explain the stress-strain diagram for ductile material.
Or
Explain the stress-strain diagram for mild steel.
Or
Discuss the stress-strain curve for a ductile material.
Or
Write short note on- Stress-strain diagram of ductile material. (RGPV Nov 2018, RGPV Dec 2017, RGPV Dec 2012, RGPV Jun 2012)
Q. 20) What is modulus of elasticity ? Give its unit of measurement. (RGPV Dec 2014)
Q. 21) What is alloy steel. Name two types of allow steel giving the composition and uses. (RGPV Jun 2014, RGPV Nov 2018)
UNIT - II
Measurement & Production Engineering
Q. 1) Explain the working of a manometer for pressure measurement. Also relate absolute pressure, gauge pressure and vacuum pressure. (RGPV Dec.2022)
Q. 2) What are dial gauges ? State its applications.
Or
Describe the construction and use of dial gauge. (RGPV Jun 2016, RGPV Dec 2015)
Q. 3) Write short note on slip gauge. (RGPV Jun 2013)
Q. 4) Write down the principle of temperature measurement.
Or
Explain the principle of temperature measurement. (RGPV Jun 2015, RGPV Jun 2014)
Q. 5) What are various methods of measuring temperature ? Explain any one. (RGPV Jun 2020)
Q. 6) Explain the working of Micrometer.
Or
With the help of neat sketch explain the working of micrometer.
Or
What is the use of micrometer. Explain it working. (RGPV Jun 2020, RGPV Nov 2018)
Q. 7) What is the principle of working of RTD. Explain. (RGPV Jun 2020, RGPV May 2019)
Q. 8) Briefly describe the concept of measurement errors. What are the various sources of measuring errors.
Or
Discuss the different sources of errors in the act of taking measurement. (RGPV Jun 2016, RGPV Jun 2015, RGPV Dec 2012)
Q. 9) What is error ? Discuss the various types of errors during measurement. (RGPV Dec 2020)
Q. 10) What is dynamometer ? Explain the different types of dynamometers. (RGPV Dec 2020)
Q. 11) Briefly explain the devices used for measuring the pressure of a fluid. (RGPV Jun 2014)
Q. 12) What is a sine bar ? Give its working principle.
Or
Write short note on – Sine bar. (RGPV Nov 2018, RGPV Jun 2020)
Q. 13) What is the use of sine bar ? State the process to measure any angle using sine bar with neat sketch. (RGPV Jun 2011)
Q. 14) Explain how sine bar used for setting an angle and for finding an unknown angle. (RGPV Dec 2015)
Q. 15) Explain the measurement process using Vernier caliper with neat sketch.
Or
Discuss the method of measurement of Vernier Caliper. (RGPV Dec.2022, RGPV Jun 2020, RGPV Jun 2014)
Q. 16) What are the various methods used for temperature measurement ? explain any one of them. (RGPV Jun 2022)
Q. 17) Explain the process of velocity measurement of fluid.
Or
Explain a process of velocity measurement of a fluid. (RGPV May 2018, RGPV Nov 2019)
Q. 18) How will you measure flow ? Name instruments used . (RGPV Jun 2016)
Q. 19) What is venturimeter ? Derive the expression for measuring rate of flow of fluid in a horizontal pipe.
Or
Explain the principle of venturimeter with a neat sketch and derive the expression for the rate flow of fluid through it.
Or
Describe the measurement of flow rate of a fluid flowing through a circular pipe. (RGPV Dec 2014, RGPV Jun 2014, RGPV Jun 2012)
Q. 20) What is torque ? What are the methods of measuring the torque ?
Q. 21) What a neat diagram explain the main parts of a lathe machine. Explain any two operations performed on a lathe machine.
Or
Draw a neat sketch of lathe machine showing essential components. State functions of three major components.
Or
What are different parts of a lathe machine ? Give their function also. (RGPV Dec.2022, RGPV Nov 2018, RGPV Jun 2016)
Q. 22) With a neat diagram explain the main parts of a drilling machine. Explain any two operations performed on a drilling machine. (RGPV Jun 2022, RGPV Nov 2011)
Q. 23) Explain the working of a vertical drilling machine with the help of a neat sketch. Also state the parameters used to specify a drilling machine. (RGPV Dec 2011)
Q. 24) What is Casting ? List it’s advantages.
Or
What is casting ? What are its advantages ? (RGPV Jun 2020, RGPV May 2018)
Q. 25) Define welding. Classify welding processes. Explain arc welding process. (RGPV Jun 2022)
Q. 26) Explain the different types of welding with their applications. (RGPV Dec 2020)
Q. 27) Write short notes on Casting (RGPV Jun 2022)
Q. 28) Write short notes on the Lathe operations (RGPV Dec 2020)
Q. 29) Write short notes on Welding defects (RGPV Dec 2022)
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UNIT - III
Fluids
Q. 1) Explain the working of a reciprocating pump with the suitable diagram. (RGPV Dec 2020)
Q. 2) What is the reciprocating pump? Explain its working with a neat sketch. (RGPV Jun 2022)
Q. 3) A flat plate of area 1.5 x 106 mm2 is pulled with a speed of 0.4 m/s relative to another plate located at a distance of 0.15 mm from it. Find the force and power required to maintain this speed, if the fluid separating them is having viscosity as 1 poise. [ 1 poise = 0.1 N s/m2 ] (RGPV Dec.2022) )
Q. 4) A plate, 0.025mm distant from a fixed plate, moves at 60 cm/s and requires a force of 2 N/unit area i.e. 2 N/m2 to maintain this speed. Determine the fluid viscosity between the plates. (RGPV Jun 2022)
Q. 5) Define viscosity. What is the importance of viscosity while selecting fluids in various engineering applications ? (RGPV Dec.2022)
Q. 6) What is Newton’s law of viscosity ? Explain it significance.
Or
State the Newton’s law of viscosity and give examples of its application.
Or
Write the Newton’s law of viscosity.
Or
State Newton’s law of viscosity. (RGPV Nov 2018, RGPV Jun 2014, RGPV Dec 2016, RGPV Dec 2015, RGPV Jun 2015)
Q. 7) Explain working principle of hydraulic turbines (Pelton wheel) with neat sketch. (RGPV Dec.2022)
Q. 8) What is fluid ? Discuss the various types of fluids.
Or
What do you mean by fluid ? Define any three properties of fluid. (RGPV Dec 2020 (RGPV June 2016)
Q. 9) State Pascal’s law. Derive Bernoulli’s equation. What are the assumptions made in Bernoulli’s equation.
Or
State Bernoulli’s equation for incompressible fluids. (RGPV Jun 2022, RGPV Jun 2016)
Q. 10) Derive Bernoulli’s equation for a perfect incompressible liquid.
Or
Write short note on – Derivation of Bernoulli’s theorem. (RGPV Jun 2015, RGPV May 2019)
Q. 11) Write short notes on Different types of fluids. (RGPV Jun 2022
Q. 12) What is difference between the dynamic viscosity and kinematic viscosity ? (RGPV Dec 2017)
Q. 13) Differentiate between laminar and turbulent flow. (RGPV May 2018)
Q. 14) Calculate specific weight, density, specific volume and specific gravity of petrol, if one litre of petrol weights 6.867 N. (RGPV Jun 2014)
Q. 15) What do you understand by the term kinetic energy ? (RGPV Dec 2016)
Q. 16) Explain with suitable diagram the working principle of fluid coupling.
Or
Explain with suitable diagram working of a fluid coupling.
Or
Describe the working principle of fluid coupling with neat sketch.
Or
Explain construction and working of fluid coupling. (RGPV Nov 2018, RGPV Dec 2016, RGPV Jun 2016, RGPV Jun 2015)
Q. 17) How hydraulic pumps are classified ? Explain. (RGPV Jun 2008, RGPV Jun 2013)
Q. 18) Discuss types of water turbine. (RGPV Jun 2016)
Q. 19) Distinguish between inward and outward flow reaction turbine. (RGPV Dec 2015)
Q. 20) Explain the working of Pelton turbine.
Or
Describe the construction and working of any one hydraulic turbine.
Or
Describe the working of Pelton turbine. (RGPV May 2019, RGPV Jun 2011, RGPV Nov 2019)
Q. 21) Explain the working principle of water turbine. (RGPV Nov 2018)
Q. 22) Define pump, compressor, turbine, positive displacement machine and pneumatic machine. (RGPV Dec 2013)
Q. 23) Write short note on Reciprocating pump. (RGPV Dec 2017)
Q. 24) Differentiate compressor with a pump. (RGPV Dec 2016)
UNIT - IV
Thermodynamics & Steam Engineering
Q. 1) Define the thermodynamic system. Differentiate between open system, closed system and an isolated system.
Or
Define thermodynamic system and explain open, close and isolated systems. (RGPV Dec 2017, RGPV Jun 2022)
Q. 2) State and explain the Zeroth law of thermodynamics.
Or
What is Zeroth law of thermodynamics ?
Or
State Zeroth law of thermodynamics. (RGPV May 2018, RGPV Nov 2019, RGPV Jun 2020)
Q. 3) Discuss the concept of thermal equilibrium and state zeroth law of thermodynamics. (RGPV May 2019)
Q. 4) Explain the Kelvin Plank and Clausius statement of thermodynamics.
Or
State and explain second law of thermodynamics.
Or
What is second law of thermodynamics ? Explain the two statements of this law. (RGPV Dec 2020, 2017, 2011, RGPV Jun 2008,2013,2014)
Q. 5) Determine the work of compression for 1 kg of air when t is compressed from a volume of 0.15 m3 at a pressure of 1 bar to a volume of 0.05 m3 at a pressure of 1 bar to a volume of 0.05 m3, when compression is –
(i) Isothermally (ii) Adiabatically (RGPV May 2019)
Q. 6) During a trial operation of a boiler 1630 kg of coal were consumed in 24 hrs. and 13000 kg of water evaporated. The mean steam pressure was 7 kgf/cm2 and condition dry saturated. The fuel contained 3 percent moisture and 4 percent ash and had a calorific value of 7200 kcal/kg. The feed water temperature was 350C. Determine
i) The boiler efficiency
ii) The equivalent evaporation per kg of dry coal
iii) The equivalent evaporation per kg of combustibles. (RGPV Dec.2022)
Q. 7) In a boiler test the following quantities were obtained ; mean temperature of the feed 200C; mean boiler pressure 10 kgf/cm2, mean steam dryness 0.9, coal burnt/hr 250 kg, water supplied to boiler per hour 2260 kg. The mass of water in the boiler at the end of the test was less than that at the commencement by 240 kg. Calculate:
i) The actual evaporation per kg of coal and
ii) The equivalent evaporation.
[ Take data as :- at 10 kgf/cm2, Hfl = 181.3 kcal/kg: hfg + 482 kcal/kg ] (RGPV Jun 2022)
Q. 8) The water is flowing through a pipe having diameter 20 cm and 10 cm at section 1 and 2 respectively. The rate of flow through pipe is 35 liters/s. The section 1 is 6m above the datum and section 2 is 4m above the datum. If the pressure at the section 1 is 39.34 N/cm2. Find intensity of pressure at section 2. (RGPV Dec 2020)
Q. 9) Discuss briefly the differences between externally fired and internally fired steam generators. Also discuss the application of each type of steam generators. (RGPV Dec.2022)
Q. 10) Discuss the difference between the boiler mountings and accessories. Explain the working of economizer in brief.
Or
What is the difference between the boiler mountings and accessories ?
Or
Differentiate between the boiler mounting and accessory. (RGPV Dec 2020, RGPV Dec 2017, RGPV Dec 2011)
Q. 11) Write short note boiler mountings. (RGPV May 2019, RGPV Nov 2019, RGPV Dec 2014)
Q. 12) Write short note boiler accessories. (RGPV Nov 2018, RGPV Jun 2020)
Q. 13) What are requirements of a good boiler. (RGPV Jun 2020, RGPV Nov 2019)
Q. 14) Discuss, how the steam generators are classified. Give example of each classification.
Or
Give classification of boilers on different basis.
Or
Discuss four types of boiler classification.
Or
State the classification of boilers. (RGPV Jun 2022, RGPV May 2019, RGPV Jun 2016, RGPV Dec 2012)
Q. 15) What is the difference between fire tube and water tube boiler ? Give example of each. (RGPV Dec 2016)
Q. 16) Explain the working of a water tube boiler with the help of neat sketch. (RGPV Jun 2012)
Q. 17) What is draught ? What are the various types of draughts.
Or
Write short notes on Boiler draught.
Or
What is draught ? Write various types. (RGPV Dec 2020, RGPV Jun 2020,RGPV Nov 2018,RGPV Dec 2016)
Q. 18) Differentiate between natural and artificial draughts. (RGPV Nov 2019, RGPV May 2019, RGPV Feb 2010)
Q. 19) Write short notes on the Boiler efficiency (RGPV Dec 2020)
Q. 20) Equivalent evaporation from and at 100OC. Explain the meaning of the term and give the reason for its use in the context of boiler performance.
Or
What is equivalent evaporation. (RGPV Dec 2015, RGPV Jun 2015)
Q. 21) What is dryness fraction ? (RGPV Dec 2016)
Q. 22) What is later heat of vaporization ? (RGPV Dec 2016)
Q. 23) What is internal energy ? (RGPV Dec 2014)
Q. 24) Show the various processes of steam in a T-s diagram. (RGPV Jun 2014)
Q. 25) Find the temperature, enthalpy, entropy and internal energy of 1 kg of dry saturated steam at 10 bar. (RGPV May 2018)
Q. 26) At 1.2 MPa, 250OC steam enters into a turbine and expands to 30OC. Determine the work output of turbine for 10 kg/s of flow rate. (RGPV Dec 2014)
Q. 27) Write short notes on Thermodynamic properties (RGPV Dec.2022)
Q. 28) State Zeroth Law of thermodynamics. How is mercury in thermometer able to find the temperature of a body using the Zeroth Law of thermodynamics ? (RGPV Dec 2022, RGPV Jun 2020)
UNIT - V
Reciprocating Machines
Q. 1) State the function of steam engine. State its applications. Also give its classification. (RGPV Jun 2016 , RGPV Dec 2011)
Q. 2) Compare Otto and Diesel cycles.
Or
Explain the fundamental difference between Otto and Diesel cycle. (RGPV Jun 2016, RGPV Dec 2014)
Q. 3) Why cooling of an I.C. Engine is required ? (RGPV Jun 2015
Q. 4) Derive an expression for efficiency of Carnot cycle with neat sketches of PV and TS diagrams.
Or
Draw the p-v diagram of Carnot cycle and express its efficiency. (RGPV Jun 2022, RGPV Dec 2014)
Q. 5) Explain the Carnot cycle with suitable PV and TS diagrams. (RGPV Dec 2020)
Q. 6) Explain the working of four stroke diesel engine with suitable PV diagram.
Or
With the help of p-v diagram, explain the working of a four stroke diesel engine.
Or
Write short note on working of 4-stroke diesel engine. (RGPV Dec 2020, RGPV Dec 2016, RGPV Dec 2014, RGPV Nov 2018, RGPV Jun 2020)
Q. 7) What is cut-off ratio ? How does it affect the air standard efficiency of an Otto cycle ? (RGPV Dec 2015)
Q. 8) Explain the following related to steam engine-
(i) Hypothetical indicator diagram
(ii) Actual indicator diagram (RGPV Jun 2016)
Q. 9) Derive an expression for efficiency of Otto cycle with neat sketches of PV and TS diagrams.
Or
Derive the expression for thermal efficiency of Otto cycle. Calculate the value for a compression ratio of 8. (RGPV Dec. 2022, RGPV Nov 2019, RGPV Jun 2020)
Q. 10) Differentiate between two stroke and four stroke I.C. Engine. (RGPV Dec 2014, RGPV Dec 2011)
Q. 11) Differentiate between the spark and compression ignition engines.
Or
Differentiate between S.I. and C.I. engine.
Or
Differentiate between petrol and diesel engines. (RGPV Dec 2017, RGPV Dec 2012, RGPV Jun 2010, RGPV Jun 2012)
Q. 12) How is the mean effective pressure for reciprocating engine defined. (RGPV Dec 2015)
Q. 13) Explain the working of four stroke diesel engine with neat sketch.
Or
Write short notes on Working of 4-stroke diesel engine (RGPV Dec 2022, RGPV Dec 2020)
Q. 14) Explain the working of two stroke petrol engine with neat sketch.
Or
Write short note on working of 2-stroke engine. (RGPV Jun 2022, RGPV Nov 2019, RGPV Jun 2011)
Q. 15) Explain the working principle of steam engine.
Or
Explain the working of a double acting steam engine with the help of a neat diagram. (RGPV May 2018, RGPV Jun 2012, RGPV Feb 2010)
Q. 16) Name the different parts of a steam engine.
Or
Give list of parts of double acting steam engine.
Or
Discuss the functions of each part of steam engine. (RGPV Dec 2016, RGPV Jun 2015, RGPV Jun 2011)
Q. 17) Define volumetric efficiency of an engine. (RGPV Dec 2016)
Q. 18) What is clearance volume. (RGPV Dec 2016)
Q. 19) Write short notes on the Compressor
Or
State the function of a compressor. State its various types. Discuss the working of any one type. (RGPV Dec 2020, RGPV Jun 2011)
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