Skip to main content

Posts

Showing posts with the label T.O.M

DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
Read more

POWER TRANSMISSION

Power Transmission Belt and Rope Drives When a wrapping connector takes the form of a band with a thickness small in comparison to its width, it is called a belt. When the cross-section of the wrapping connector is circular, it is called a rope. Types of Belts Type Description Use Flat Belt A belt having a rectangular cross-section. It is used for power transmission when the distance between two pulleys is not more than 8 meters. It is mostly used in factories. V-Belt A belt having a trapezoidal cross-section. It is used for power transmission when two pulleys are close to each other. It is suitable for transmitting large power. Circular or Rope Belt A belt having a circular cross-section. It is used when the distance between two pulleys is more than 8 meters. Advantages and Disadvantages of V...
Read more

Mechanisms Page No 3

Q-9.Kinematic Chain:-  A kinematic chain is a combination of kinematic links in space that are so connected that the relative motion of the links is completely or successfully constrained, and the last link is connected to the first link. Example:- Four bar chain                    Slider Crank Relationship which is good for Kinematie Chain  (No of links )  L = 2P ( no of Pair ) - 4                                  & ( No of joint ) J = 3/2L - 2  Kinematic Chains and Their Constraints A kinematic chain consists of a series of kinematic links connected in such a way that the relative motion between the links is either completely constrained, partially constrained, or unconstrained. This chain can be classified based on the relationship between the number of links (l) and the number of pairs (p). 1. Locked Chain (Structure)   ...
Read more

Mechanisms Page No-2

Criterion Machine (M/C) Structure Energy Transformation It transforms energy It does not transform energy Relative Motion Relative motion between its parts No relative motion between its parts Function of Links In this link, motion and power are transmitted In this link, it carries loads having straining actions Examples: Machine (M/C) Examples: Lathe Shaper Structure Examples: Roof Trusses Q-8.what is constrained motion  And :- The motion which is take place in a definite direction. It has 3 types  1. Completely Constrained Motion:-  Motion occurs in a definite direction regardless of applied force. Example:- Motion of a piston in a cylinder. 2. Incompletely Constrained Motion: - Motion occurs in more than one direction. Example:-  Motion of a pair taking place in various directions. 3.Partially or Successfully Const...
Read more

Mechanisms Page No-1

 1. Machine:-   A machine is a device that receives energy in some available form and utilizes it to perform a specific type of work.   2. Theory of Machines (T.O.M): -  It deals with the study of the relative motion between the various parts of a machine and the forces that act on them. Sub-divisions:- 1.Kinematics of Machines :-  Focuses on the relative motion between the parts of a machine without considering the forces that cause this motion. 2.Dynamics of Machines:-  Focuses on the relative motion between the parts of a machine while considering the forces acting on them when they are in motion. It is subdivided into 2 .  a. Statics:- Deals with the study of forces acting on the various parts of a machine when the parts are at rest.   b. Kinetics:-  Deals with the inertia forces due to mass and motion considerations Q-2: Define Rigid Body Ans:-  A rigid body may be defined as a body which can retain its shape and size when appl...
Read more

Popular posts from this blog

DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
Read more

LANCASHIRE BOILER

LANCASHIRE BOILER -   It is non portable fire tube type horizontal boiler. It consists of cylinder shells with two tubes A and B called Fire Tubes which are symmetrical in dimension. Each Fire Tubes Contain a furnace in front of it, there is a Grate over which fuel is burn. CONSTRUCTION - it is a stationary fire tube internally fired horizontal boiler. These boiler have a cylinder shell of 2m in diameter and it's length varies from 7.5m to 10m . It has two large internal fire tubes having diameter 80cm to 100 cm in which grate is situated. WORKING - The fuel is burn in a fire great and on burning the fuel combustion Process take place The fuel gas enter the main tube by the fire deflector. As the flue gas moves in tubes they heat up the tubes and water which is surrounded the tubes is also heated. After this process water is converted into steam. The steam is taken out from steam supply valve. Application - it is used in sugar mills and chemical industry. ADVANTAGES •  It...
Read more

FIRE AND WATER TUBE BOILER

Water Tube Boiler Fire Tube Boiler The rate of steam generation is high, up to 450 tonnes/hr The rate of steam generation is low, up to 9 tonnes/hr It generates steam at high pressure up to 165 bar It generates steam at low pressure, up to 24.5 bar Its overall efficiency is 90% Its overall efficiency is 70% Less water is required for steam generation More water is required for steam generation It is suitable for load fluctuations It is not suitable for load fluctuations Water flows in tubes which are surrounded by fire Fire flows in tubes which are surrounded by water Operating cost is high Operating cost is low Wall thickness is less Wall thickness is more Cost of installation is high Cost of installatio...
Read more