Magnetic iron rock
11. It is a graphical representation of a real thing to define and specify the shape and size of a particular object by means of lines.
12. What is Engineering Drawing ?
12.A drawing which is worked out an engineer for the engineering purpose is known as Engineering Drawing.
13.What are the standard sizes of drawing board as per Indian Standards?
13.As per Indian Standards :1250×900,900×650,650×500,500×350,350×250 sizes are available.
14.What is a Vernier Scale ?
14.This is used to measure very small unit with greater accuracy. It consists of a primary scale and a vernier scale.Vernier scale slides on the primary scale.
15. What is Representative Fraction ?
15.It is the ratio of drawing to the Object. R.F=Length of the object in the drawing /Actual length of the object.
16.Otto cycle can be explained by a pressure volume relationship diagram. It shows the functioning cycle of a four stroke engine. The cycle starts with an intake stroke, closing the intake and moving to the compression stroke, starting of combustion, power stroke, heat exchange stroke where heat is rejected and the exhaust stroke. It was designed by Nicolas Otto, a German engineer.
17. What is difference between pressure and stress?
17.When the force or load acting on the fluid (pneumatic or hydraulic) per unit area is known as PRESSURE its purely subjected to fluids.when the force or load acting on the object (solid) within the elastic limit of an object create internal resistance to resist the apply load. that internal resistance is known as STRAIN for per unit area of that object Its mainly subjected to solids
18. What’s the range of poisons ratio of a stable material?
18.Theoretical values are — -1 to 0.5 Practical values are — 0 to 0.5
19. What is the difference between limit of proportionality and elastic limit
19.Up to the Limit of proportionality stress is directly proportional to strain,follows hooks law,elastic limit is limit for elasticity of material.
20.what is neutral axis of the cross-section beam?
20.The neutral axis of the cross-section a beam is that axis at which the bending stress is zero