Hole- All the internal feature of a machine including those which are not cylindrical It is denoted by capital letter (H,G ,E) Shaft- All the external feature of a machine including those which is not circular. It is denoted by small letter (h,g,e) Allowance it is the difference between basic dimensions of holes an…

Boiler mountings 1) Safety valve 2) Water level indicator 3) Pressure gauge 4) Fusible plug 5) Steam stop valve 6) Feed check valve 7) Blow-off valve 8) Safety valve Type of safety valves are- Lever safety valve Spring-loaded safety valve High steam-low water safety valve Safety valves are attach…

difference between two stroke and four stroke engine S.No. Four stroke engine Two stroke engine 1.  It has one power stroke for every two revolutions of the crankshaft. It has one power stroke for each revolution of the crankshaft. 2.   Heavy flywheel is required and engine runs unbalanced because turning moment …

The deformation of metal according to the temperature of the material is  Hot working Cold working H ot working  Mechanical working processes which are done above recrystallization temperature of the metal are known as hot working processes. Some metals, such as lead and tin, have a low  recrystallization  temperature and…

There are many type of measuring tools which are used in workshop some of important tools are given below- Steel scale They are used to measure lengths and other geometrical parameters. They can be a single steel plate or flexible tape type tool. Calipers They are usually of two types- inside and outside caliper. They are…