A Complete Online Guide For Every Mechanical Engineers
1. What is the difference between Pipe and Tube? Ex. Iron Pipe, Carbon Tube, Steel Tube etc. · Tube is defined by Outer diameter and Wall thickness (OD and WT). While Pipe is defined by Inner diameter (ID). Example: 2 inch pipe have 2.375 inch outer diameter, where 2 inch tube have same 2 inch…
Introduction to AUTOCAD: AutoCAD, created by Autodesk, is the most widely used technical drawing program wherewith over 1.25 million registered users. Autodesk is the fourth largest PC software company in the world. According to the Autodesk, and for Computer Aided Design (CAD), but can also stand for Computer Aided Drafting or Drawing. The first version…
Introduction to Pro / Engineer Wildfire Pro/Engineer Wildfire is a powerful program used to create complex designs with great precision. The design intent of any three dimensional model or an assembly is defined by its specification and its use. You can use the powerful tools of Pro/Engineer Wildfire to capture the design intent of any…
Gas Welding Process: Gas welding is a fusion process in which fusion is obtained by completely melting the joint. The heat required for heating and melting the parent and filler metal is obtained by the combustion of a fuel gas with oxygen. Fuel gas used in welding can be acetylene, propane, hydrogen, butane and natural…
(1) Pitot tube is used for measurement of (a) Pressure (b) Temperature (c) Discharge (d) Velocity Ans.: (d) Velocity (2) Slow plastic deformation of material under constant stress is (a) Creep (b) Fatigue (c) Endurance (d) Elastic deformation Ans.: (a) Creep (3) Mass balancing is done to (a) Avoid flutter (b) Increase bending stress (c)…
1. Normalizing operation is carried out in a) Water b) Oil c) Air d) Furnace Ans.: c) Air 2. The main purpose of heat treatment of steels is to change the a) Chemical composition b) Mechanical properties c) Surface finish d) Physical properties Ans.: b) Mechanical properties 3. Which of the…
1. Draft on pattern means b) Allowance for machining c) Locating pad d) Compensate for stripping e) Compensation for shrinkage Ans.: d) Compensate for stripping 2. Slag inclusion in the casting is a a) Surface defects b) Internal defect c) Crack d) Notch Ans.: a) Surface defects 3. Fettling is an operation performed…
1. Seamless rings are made by the process a) Super-plastic forming b) Mandrel forging c) Ring rolling d) Diffusion bonding Ans.: c) Ring rolling 2. Internal defects in material is detected by a) Fluorescent penetrate check b) Red dye check c) Ultrasonic d) Eddy current check Ans.: c) Ultrasonic 3. Smaller the grains…
Solar radiation received on earth in just one hour is more than what the whole world’s population consumes in one year. 3,850,000 Exajoules (EJ) amount of solar energy received by Earth Surface per year. In 2011, worldwide primary energy consumptions was 550 EJ. 7 hours of Solar Energy at Deserts can meet annual global energy…
Inspection of Castings: A large number of methods have been developed to inspect castings for defects that may occur during their production. Such inspections may be in process inspections or finished product inspections. In process inspections are carried out before a lot of castings have been completed to detect any flaws that may have occurred…
Sand Casting Defects: • Production of castings involves a large number of steps including casting design, pattern making, moulding, melting, pouring, shake out, fettling, inspection and finishing. • It is not uncommon for one or more of these steps to be performed unsatisfactorily due to use of defective material or equipment, carelessness of the operator…
Sand Casting Defects: • Production of castings involves a large number of steps including casting design, pattern making, moulding, melting, pouring, shake out, fettling, inspection and finishing. • It is not uncommon for one or more of these steps to be performed unsatisfactorily due to use of defective material or equipment, carelessness of the operator…
Centrifugal Casting: Centrifugal casting is done by pouring molten metal into a rotating mould. The centrifugal force acting on the mould helps in feeding and positioning the metal in the mould. Mould rotation is continued till after the metal is solidified. Centrifugal casting results in denser and cleaner metal as heavier metal is thrown to…
Die Casting: The die casting process uses steel dies into which metal is forced under pressure through a runner and gate to fill the dies. The pressure (70 to 5000 kg/cm2) is maintained while the casting solidifies after which the dies are separated, cores are withdrawn and the casting is ejected. Metals and alloys that…
