Showing posts from October, 2020

What is COUPLING in mechanical engineering - ITI ONLINE NOTE

 Couplings  1- Shaft transportation problem are usually available up to 7 meters length more length causes as. 2- To have greater length, it is necessary to join two or more pieces of shafts by means of couplings . 3- Connect the ends of two shafts together.  4- Transmit power from one shaft to other shaft.  5- Reduce the vibrations.  6- Provide mechanical flexibility. 7- Permit misalignment of shafts. Requirements of couplings  1- It should be easy to connect or disconnect.  2- It should transmit full power of shaft. 3- It should hold the shafts in perfect alignment.  4- It should have no projecting parts.  Types of couplings  1- Rigid Couplings . 2- Flexible Couplings . Rigid couplings  1- It is used to connect two shafts which are perfectly aligned.  Types of rigid couplings  1- Sleeve or muff coupling .  2- Clamp or split muff couplings .  3- Flange coupling.   > Protected type . > Un protected type . > Marine type  Sleeve or muff coupling 1- Sleeve or muff coupling is th


Safety Signe 1- In older days road locomotive carrying a red flag by day and red lantern by night.  2- Safety is the prime motive of every traffic.  Kinds of road signs  a)- Mandatory . b)- Cautionary . c)- and Informatory a)- Mandatory sign- Violation of mandatory sign can lead to penalties.  Ex. Stop, give  way  limits, prohibited, no parking and compulsory sign. b)- Cautionary signs- Cautionary/ warning signs are especially safe.  Do's and dont's for pedestrians, cyclists, bus passengers and motorists. c)- Information signs- Information signs are especially benefit to the passengers and two wheelers. Marking lines on road- • Marking lines are directing or warn to the moving vehicles, cyclist and pedestrians to follow the law.  • Single and short broken lines with middle of the road allow the vehicle to cross the dotted lines safely overtake whenever required.  • When moving vehicle approaching pedestrian crossing, be ready to slow down or stop to let people cross.  • Do not


First-aid 1)- There is every possibility of an accident in the workshops or industries and can be happened at any time.  2)- It is not practically possible to have doctor available all the time and at every place.  3)- So in case of sudden an accident, sickness or wounded condition, before any doctor or shifting to near hospital the patient is given some treatment known as First Aid .  The duty of First Aid person is as follows: 1. The first of all duty of a First Aid person is try to call the doctor at once and try to give relief to the patient suffering from pain, fever or injury etc. till the doctor comes. 2. If blood is flowing from injury try to stop it at once. 3. It is well known fact that accident can be occurred by chance and if the location of doctor or hospital is far away then try to apply whatsoever is available in the interest of a patient. 4. Patient or injured person should be lay down to the bed so that he can breathe properly and if he feels some problem then arti


 FITTER TRADE PRACTICAL-EX NO-2 Safety attitude development of the trainees by educating them to use personal protective equipment (PPE). Job Sequence •  1- I will Read and interpret the visuals of personal protective equipment on real devices or from the charts.  2- Identify and select personal protective equipment used for different types of protection.  3- Write the name of the PPE and the corresponding type of protection and the hazards in table 1. TABLE- 1 SL NO IMAGE NAME OF THE PPE HAZARDS TYPE OF PROTECTION  1  Full body protection   chemical, biological, radiological, nuclear   protection is required when the greatest potential for exposure to hazards exists.  2  Safety belt  Death – Not wearing a safety belt can cause fatal injuries  If you fell on the long height, Wear then your body protects.  3 Helmet F

Personal Protective Equipment (PPE)-FITTER ONLINE NOTE

 Personal Protective Equipment (PPE) i)- Personal Protective Equipment (PPE) is specialized clothing. ii) Personal Protective Equipment (PPE) is specialized clothing or equipment worn by an employee for protection against. iii)- Depending upon the nature of hazard, the PPE is broadly divided into the two categories.      a)- Non- respiratory, b)- Respiratory Non- respiratory   Those used for protection against injury from outside the body, i.e. for protecting the head, eye ,   face , hand, arm, foot, leg and other body parts. Respiratory: Those used for protection from harm due to inhalation of contaminated air.                                              PPE 1 Helmet PPE2 Safety footwear PPE3 Respiratory protective equipment PPE 4 Arms and hands protection PPE 5 Eyes and face protection PPE 6 Protective clothing and coverall