ENGINEERING MECHANICS & STRENGTH OF MATERIALS ( 3 sem Mechanical Engineering Syllabus )

Subject Title                       :           Engineering Mechanics & Strength of Materials.

Subject Code                      :          

Hours Per Week                :           04

Hours Per Semester          :           64

TOPIC ANALYSIS

SL.No	Major Topics	Hours Allotted	Weightage of Marks
SECTION-I
1	Introduction to Engineering Mechanics	01	02
2	Force Analysis	08	18
3	Centre of Gravity & Moment of Inertia	10	30
SECTION-II
4	Simple stresses & Strains	08	20
5	Bending moment & Shear forces	10	30
SECTION-III
6	Strain energy & Impact loading	02	05
7	Theory of simple bending & Theory of torsion	08	20
8	Thick & Thin cylinders	08	20
9	Industry Institute Interaction	05	-
10	Tests & Revisions	04
	Total	64	145

Basic Hydraulic System Test Questions

The following items will test your grasp of the material covered in this lesson. There is only one correct answer for each item. When you have completed the exercise, check your answers with the answer key that follows. If you answer any item incorrectly, study again that part of the lesson which contains the portion involved.

Mechanical Engineering Question Bank Objective Type

Question Bank of Mechanical Engineering Objective Type

Questions

Part1 :

True or False Type Statements

Organisation of Mech. Engg. Deptt.
1. The Mechanical Engineering Department employs 25% of the overall staff
strength of Indian Railways.
2. RCF is situated in Patiala.
3. Repower-packing of Diesel Locos is carried out in DLW.
4. COFMOW deals with New Maintenance Practices for Workshops.
5. Diesel sheds are under the administrative control of CWE

Formula to calculate speed of the shaft and diameter of pulley

FORMULA FOR CALCULATING SPEED OF THE SHAFTS AND DIAMETER OF THE PULLEY

EXPLODE RENDER ANIMATE

rticle FROM Solid Edge Explode — Render — Animate application  Publication Number  spse0154

Defining motors

 

 

 

 

 

· There are two types of motors that can be defined in Solid Edge: rotational and linear.· You use motor features to help you observe how a set of under-constrained parts will move relative to the part you define as a motor

1. · This allows you to design and simulate complex mechanisms where the movement of a set of interrelated parts needs to be simulated.
2. Motor command
   · Defines a rotational or linear motor using an element on a selected part.
   · You can then use the Simulate Motor command to display a kinematic simulation of the motion in an assembly.
   · You use motor features to help you observe how a set of under-constrained parts will move relative to the part you define as a motor.  This allows you to design and simulate complex mechanisms where the movement of a set of interrelated parts needs to be simulated.
   · This is useful when working with assemblies that contain moving parts such as gears, pulleys, crankshafts, parts that travel in grooves or slots, and hydraulic or pneumatic actuators.
   For example, you can specify that a crankshaft part (A) in a mechanism rotates around an axis you specify (B).
   · You can then use the Motor Simulation command to playback a kinematic simulation of how the under-constrained parts in the assembly move.
   · Press F5 to replay the animation
   · You can define properties for the motor, such as the type of motor, the motor rate or speed, motor direction, and any limits you may want to place on the motor.
   · When you define a motor feature using the Motor command, an entry is added for the motor feature to PathFinder.
   · You can select the motor entry in PathFinder to edit the motor feature later.
   Types
   You can define the following types of motors:
   1 .Rotation 2. Linear
   Steps
   The basic steps for defining a motor are:
   • Specify the type of motor you want, Rotation or Linear.
   • Select the part you want to act as a motor.
   • Define the movement axis.
   • Specify the motor rate and limits.
   Specifying Motor Type
   The Motor Type list on the command bar allows you to define the type of motor you want. You can specify whether you want the motor type to be Rotation or Linear.
   Selecting the Part
   • You can only select a part that is under-constrained, or has relationships suppressed.
   • The assembly should also be under-constrained such that the mechanism is free to move in the proper axes.
   Defining the Movement Axis
   · Depending on the motor type you specify, you can select faces, edges, or cylindrical axes to define the motor axis.
   · For example, to define a Rotary motor, you can select cylindrical faces, cylindrical edges, or cylindrical axes.
   Specifying the Motor Rate and Limits
   · The Motor Value and Limits options on the command bar allow you to specify the speed or rate you want the motor operate at, and any limits on the travel you want to impose.
   · For example, you may want to specify that a rotational motor rotates at 1750 revolutions per minute, and makes two complete revolutions (720 degrees).
   · You can set the working units you want to use for the angular and linear velocity of a motor using the Advanced Units button on the Units tab of the File Properties dialog box, on the File menu.
   Motor Definition and Simulation Guidelines
   · You can define as many motors as you want in an assembly.
   · When you define multiple motors in an assembly, use the Motor Group Properties dialog box, available with the Simulate Motor command and the Animation Editor tool to specify which motors you want to use,
   · whether you want to detect collisions during the simulation, and so forth.
   · When working with more than one motor, use the Animation Editor tool to specify when the motors start time, duration time and stop time for each motor.
   · This allows you to design and simulate complex mechanisms where the timing and positioning of the parts is critical to understanding the behavior of the mechanism.
   Note
   · Only motors in the active assembly participate in a motor simulation.
   · If you want subassembly parts to move in response to a motor simulation, you need to make the subassembly adjustable, using the Adjustable Assembly command on the PathFinder shortcut menu.
   Simulate Motor command
   · Display a kinematic simulation of motion in an assembly.
   · You use motor features to define how a set of interrelated parts will move.
   · This is useful when working with assemblies that contain crankshafts, gears, pulleys, and hydraulic or pneumatic actuators.
   · When you click the Simulate Motor button, the Motor Group Properties dialog box is displayed,
   · so you can specify which motors you want to use, whether you want to detect collisions during the simulation, and so forth.
   · When you click OK, the Animation Editor tool is displayed so you can run the simulation.
   · To run the simulation, click the Play button.
   Note
   · The Simulate Motor command contains a subset of the Animation Editor functionality.
   · To access the full functionality of the Animation Editor tool, you must use the Animation Editor command in the Explode-Render-Animate application.
   · To access the Explode-Render-Animate application, on the Tools tab, click Explode-Render-Animate.
   Motor Group Properties dialog box
   No Analysis
   Allows you to move under-constrained parts and observe the results.
   Detect Collisions
   Allows you to detect collisions during motor animation.
   Physical Motion
   • Allows you to simulate physical motion between parts.
   • This option detects contact between unconstrained surfaces and applies temporary constraints between the contacting surfaces.
   • This makes it possible to analyze motion in mechanisms that contain gears and other forms of sliding contact
   Motor Duration
   Specifies how the motor duration is defined.
   Use Motor Limits as Duration if Defined
   Specifies that the motor limits define the duration.
3. Default Motor Duration
4. Specifies the motor duration in seconds. You can type a value.
   Available Motors
   Lists the available motors. You can use the Add and Remove buttons to add motors to and remove motors from the Motors in Animation list.
   Add
   Adds a motor to the Motors in Animation list.
   Remove
   Removes a motor from the Motors in Animation list.
   Motors in Animation
   Lists the motors that will be used in the animation.
   Activity: Motor
   • In this activity, you will assign a motor to a part in an assembly.
   • The type of motor will be a rotational type and be applied to a gear in a clock.
   • The speed of the motor will be such that the second hand of the clock moves at the operating speed of 1 rpm.
   • The gear relationships are predefined, and by assigning the motor to the appropriate gear, motion can be shown through motor simulation.
   • The motor simulation used here will later be used to create an animation of the clock.