Q.1) What safety precautions should be observed while working in the workshop ?
1) Keep shop floor clean, free from oil and other slippery materials.
2) Wear proper dress and avoid loose clothing and loose hair.
3) Wear shoes and avoid chapels.
4) Avoid playing, loose talk and funning inside the shop floor.
5) Keep good housekeeping and put all unnecessary items and rejected items in scrap box.
6) Learn everything about the machine before starting and clear all the doubts.
7) Keep a safe distance from rotating and sliding parts.
8) Never store inflammable materials inside or around the shop.
9) Never play with electricity, fire, parts with sharp edge etc.
10) Keep fire buckets and extinguishers ready for use.
Q.2) What are the precautions to be taken to avoid fire ?
1) The buckets along with sand should be placed inside the workshop.
2) Switches and other electrical parts must be made of fireproof material.
3) Carbon dioxide gas should be place at required points in special containers.
4) Fire extinguishers of suitable type should be placed at accessible places.
Q 3) What are the methods of extinguishing fire ?
1) Starvation. Separating or removing the burning material from the neighbour hood of the fire.
2) Blanketing. Preventing the air flow to the fire.
3) Cooling. Lowering the heat created by burning materials.
Q.4) What is a Drawing ?
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
1) Keep shop floor clean, free from oil and other slippery materials.
2) Wear proper dress and avoid loose clothing and loose hair.
3) Wear shoes and avoid chapels.
4) Avoid playing, loose talk and funning inside the shop floor.
5) Keep good housekeeping and put all unnecessary items and rejected items in scrap box.
6) Learn everything about the machine before starting and clear all the doubts.
7) Keep a safe distance from rotating and sliding parts.
8) Never store inflammable materials inside or around the shop.
9) Never play with electricity, fire, parts with sharp edge etc.
10) Keep fire buckets and extinguishers ready for use.
Q.2) What are the precautions to be taken to avoid fire ?
1) The buckets along with sand should be placed inside the workshop.
2) Switches and other electrical parts must be made of fireproof material.
3) Carbon dioxide gas should be place at required points in special containers.
4) Fire extinguishers of suitable type should be placed at accessible places.
Q 3) What are the methods of extinguishing fire ?
1) Starvation. Separating or removing the burning material from the neighbour hood of the fire.
2) Blanketing. Preventing the air flow to the fire.
3) Cooling. Lowering the heat created by burning materials.
Q.4) What is a Drawing ?
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
5) What is Engineering Drawing ?
A drawing which is worked out an engineer for the engineering purpose is known as Engineering Drawing.
A drawing which is worked out an engineer for the engineering purpose is known as Engineering Drawing.
6) What is a sketching ?
This is freehand expression of the graphic language.
This is freehand expression of the graphic language.
7) What do you mean by First Aid ?
First Aid is immediate and temporary care given to a person who affected accidental injury or a sudden illness before the arrival of doctor.
First Aid is immediate and temporary care given to a person who affected accidental injury or a sudden illness before the arrival of doctor.
8) What is an accident ?
An accident is a unexpected and unforeseen event which may or may not injury to a person or a machine tool.
An accident is a unexpected and unforeseen event which may or may not injury to a person or a machine tool.
9) What are the standard sizes of drawing board as per Indian Standards?
As per Indian Standards :1250×900,900×650,650×500,500×350,350×250 sizes are available.
As per Indian Standards :1250×900,900×650,650×500,500×350,350×250 sizes are available.
10) What are the functions of a scale ?
(a) To measure distance accurately.
(b) For making drawing to scale either in full size, reduced size or enlarged size.
(a) To measure distance accurately.
(b) For making drawing to scale either in full size, reduced size or enlarged size.
11) What is the use of mechanical engineer’s scale ?
This is flat or triangular shape and used for making drawings of machines and structural parts in 1/8, 1/4, 1/2 or full size.
This is flat or triangular shape and used for making drawings of machines and structural parts in 1/8, 1/4, 1/2 or full size.
12) What is a Vernier Scale ?
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.
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.
13) What is Representative Fraction ?
It is the ratio of drawing to the object. R.F=Length of the object in the drawing /Actual length of the object.
It is the ratio of drawing to the object. R.F=Length of the object in the drawing /Actual length of the object.
14) What is Drafting machine(Mini Drafter) ?
It is a device to do drawing work neatly and quickly.An attachment provided to move any position and may be adjusted at any required height.
It is a device to do drawing work neatly and quickly.An attachment provided to move any position and may be adjusted at any required height.
15) What is a lettering ?
Lettering is the presentation of information data on a drawing.
Lettering is the presentation of information data on a drawing.
16) Why Gothic style lettering is universally used in industry ?
Because it is more legible than other styles.
Because it is more legible than other styles.
17) What are Section lines ?
Section lines are thin lines and used to show the cut surface of an object in sectional view.
Section lines are thin lines and used to show the cut surface of an object in sectional view.
18) What is a Centre line ?
Centreline is a thin line in the form long and short dashes. It indicates area of symmetrical parts, circles and path of motion.
Centreline is a thin line in the form long and short dashes. It indicates area of symmetrical parts, circles and path of motion.
19) Explain briefly the following lines used in Engineering drawing ?
(a)Dimension Lines (b)Extension Lines (c)Leaders
Dimension lines are the thin lines used to indicate extents and direction of dimension. These are terminated with arrowheads.
Extension lines are also thin lines and it used to indicate the termination of a dimension.
Leaders are used to direct notes or identification symbols to feature on the drawing.
(a)Dimension Lines (b)Extension Lines (c)Leaders
Dimension lines are the thin lines used to indicate extents and direction of dimension. These are terminated with arrowheads.
Extension lines are also thin lines and it used to indicate the termination of a dimension.
Leaders are used to direct notes or identification symbols to feature on the drawing.
20) What are Cutting Plane Lines ?
These are thick lines used to indicate the location of cutting planes in sectioning and the viewing position of removed pieces.
These are thick lines used to indicate the location of cutting planes in sectioning and the viewing position of removed pieces.
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