How are antifriction bearings selected?

Antifriction bearings are selected based on factors like load, speed, operating conditions, and required life, often using manufacturer's catalogues which provide load ratings and life calculations.

What is MRP processor?

MRP (Material Requirements Planning) processor is a system used in production planning and inventory control to manage materials, schedule production, and ensure timely availability of components.

Explain the concept of productivity in manufacturing.

Productivity is a measure of efficiency, typically defined as the ratio of output (goods or services) to input (labor, capital, materials). It is enhanced by using advanced machinery like machining centers, process optimization, and automation.

What is the significance of depth being more than width for beams?

For beams, depth is generally made more than width to increase the section modulus, which is proportional to bd² (where b is width and d is depth). A larger section modulus leads to a higher resistance to bending, making the beam more efficient in carrying loads.

What are the advantages of liners in IC engines?

Liners in IC engines provide a replaceable wear surface for the piston rings, facilitate cooling, and can be made of materials optimized for wear resistance and thermal conductivity.

How is productivity enhanced by using a machining center?

Machining centers enhance productivity by integrating multiple machining operations (milling, drilling, boring) into a single setup, reducing setup times, improving accuracy, and enabling automated tool changes.

MPSC Mechanical Engineering Optional 2007 Paper - Solved Questions

Name: MPSC Mechanical Engineering Optional 2007 Paper - Solved Questions
Creator: MPSC
Keywords: MPSC Mechanical Engineering Optional 2007, Maharashtra Forest Services Exam Paper, Mechanical Engineering Descriptive Questions, MPSC 2007 Paper Solutions, Strength of Materials Problems, Machine Design Questions, Manufacturing Processes Explained, Thermodynamics Exam Questions, Fluid Mechanics Problems, Production Management Concepts, EDM Process, Beam and Shaft Design, Spring Calculations, Bearing Selection, Robotics in CAM

Maharashtra Government Jobs Engineer 2007

Year 2007
Conducted By MPSC
Questions 5
Maximum Marks 200
Duration 3 Hours
Languages English & Hindi

Exam Details

Detail	Information
Examination	MPSC Maharashtra Forest Services Main Examination
Year	2007
Conducting Body	MPSC
Paper	Mechanical Engineering (Optional)
Subject	Mechanical Engineering
Duration	3 Hours
Maximum Marks	200
Number of Questions	5
Question Type	Descriptive / Subjective

This is the Mechanical Engineering (Optional) paper for the MPSC Maharashtra Forest Services Main Examination held in 2007. The paper consists of descriptive questions, with a total of 200 marks and a time duration of 3 hours. Question 1 is compulsory, and candidates must attempt any four of the remaining questions, selecting one from each section. The questions cover a range of topics within Mechanical Engineering, including mechanics of materials (beams, shafts, springs), fluid mechanics (nozzles), thermodynamics (engines), manufacturing processes (EDM, IC engines), machine design (bearings, belts), robotics, and production management (MRP). The paper aims to assess the in-depth knowledge and application skills of candidates in mechanical engineering principles relevant to forest services. Detailed solutions and analysis are provided for each question, helping aspirants understand the expected depth of answers and problem-solving approaches.

Major Topics Covered

Mechanical Engineering
MPSC Maharashtra Forest Services
Main Examination
2007
Descriptive Questions
Mechanics of Materials
Strength of Materials
Beam Design
Shaft Design
Spring Design
Fluid Mechanics
Nozzles
Thermodynamics
Internal Combustion Engines
Manufacturing Processes
EDM
Pelton Wheel
Bearings
Robotics
CAM
Belts and Pulleys
Production Management
MRP
Productivity
Machining Centers

Why This Paper is Important

Useful for MPSC Maharashtra Forest Services Main Ex preparation
Helps understand the latest exam pattern
Useful for practice and self-assessment
Covers frequently asked General Studies topics
Helpful for analysing question trends

Related Resources

Instructions

ATh MFS 2007 MECHANICAL ENGINEERING (Optional) 000184 यंत्र अभियांत्रिकी ( वैकल्पिक ) Time: 3 hours Maximum Marks: 200
Note: (i) In all attempt Five Questions.
(i) In all attempt Five Questions.
(ii) Question No. 1 is Compulsory.
(iii) Of the remaining Questions, Attempt Any four by selecting one Question from each section Numbers of optional questions upto the prescribed number in the order in which questions
(iv) have been solved, will only be assessed and excess answers of the question/s will not be assessed. Question

Questions (page 2)

Q1. Answer any four (Ten marks each). Cantilever beam of rectangular section, having 2m span, carries vertical load at free end of 10kN. If depth to width ratio is 2, allowable bending stress is 200 N/mmu00b2 and factor of safety 2. Find cross section of beam. Draw nature of S. F. and B. M. diagram. Explain why depth is always more than width for the beams.

Q2. What is purpose of servo system in EDM? Explain with sketch EDM process, it's advantages, limitations and applications.

Q3. Describe with sketch how load and speed regulation and hydraulic braking is. done in pelton wheel.

Q4. Air expands from 3 bar to 1 bar in nozzle. Initial velocity is 90 m/sec and temperature is 150u00b0C. Find final velocity assuming adiabatic condition with Cp = 1.005 ext{ kJ/kgK}.

Q5. Power required to mill is 30,000 kN.m/min. If heat source is at 400^{circ}C and surrounding at 27u00b0C. If actual engine is 30% efficient as Carnot engine, working between same temperature limits. Find energy supplied.

Q6. Describe how antifriction bearings are selected for particular application from manufacturer's catalogue.

Q7. Shaft transmitting 20 kW power at 500 RPM and bending moment of 1000 N.m. If permissible shear strength of shaft material is 100 ext{ N/mm}^2. Find diameter of shaft.

Q8. Define robot. Discuss it's applications in CAM with justification.

Q9. Belt is transmitting power of 15kW with speed reduction from 1440 RPM to 480 RPM. If belt speed is approx. 20m/sec and centre distance between pullies is twice the bigger diameter of pulley. Find pulley diameters, length of belt, wrap angle and correct belt velocity.

Q10. Helical spring is made from wire of 6mm diameter and outside diameter of spring is 75mm. If permissible shear stress is 350 MPa and modules of rigidity 84 kN/mmu00b2. Find axial load which spring can carry and deflection per active number of turns. (Neglect Curvature effect)

Q11. Explain term 'Productivity'. Discuss how productivity is enhanced by using machining centre.

Q12. Describe with sketch, how liners of I.C. engines are manufactured. Explain advantages of the process.

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Frequently asked questions

What is the exam name and year?

The exam is the MPSC Maharashtra Forest Services Main Examination, held in 2007.

What is the subject and paper code?

The subject is Mechanical Engineering (Optional), with paper code 000184.

What is the total marks and time duration?

The maximum marks are 200, and the time allowed is 3 hours.

How many questions need to be attempted?

Candidates must attempt five questions in total. Question 1 is compulsory, and any four from the remaining questions must be attempted, with one from each section.

What topics are covered in the Mechanical Engineering Optional paper?

The paper covers topics such as mechanics of materials, fluid mechanics, thermodynamics, manufacturing processes, machine design, robotics, and production management.

What is the purpose of servo system in EDM?

The purpose of a servo system in EDM (Electrical Discharge Machining) is to precisely control the gap between the electrode and the workpiece, ensuring optimal machining conditions and surface finish.

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