D73 CHECK YOUR LEVEL

Which instrument is used to draw circles in both pencil and ink?

• Divider
• Compass
• Protractor
• French curve

Answer explanation

Compass is used for drawing circles with pencil or ink.

In a compass, one leg has a steel needle, the other has:

• Screw
• Socket for attachments
• Eraser
• Lead only

Answer explanation

One leg has a needle, the other has a socket for interchangeable attachments.

Dividers are mainly used for:

• Drawing arcs
• Measuring and transferring dimensions
• Drawing parallel lines
• Checking angles

Answer explanation

Dividers transfer dimensions or divide lines into equal parts.

Which pencil grade indicates medium softness?

• 2H
• HB
• 2B
• 4B

Answer explanation

HB pencil grade denotes medium softness.

The grade H in pencils indicates:

• Hardness
• Softness
• Blackness
• Bluntness

Answer explanation

Grade H increases with hardness of pencil lead.

Which type of pencil is commonly used by professional draughtsman?

• Ordinary wooden pencil
• Mechanical clutch pencil
• Color pencil
• Marker

Answer explanation

Mechanical clutch pencils are easy to use and preferred by draughtsmen.

Which pencil lead shape is suitable for compass work?

• Conical
• Cylindrical
• Bevel (wedge)
• Flat

Answer explanation

In compass, pencil lead is sharpened to bevel point for smooth arcs.

Which method is used to locate position of plane table station using known objects?

• Intersection method
• Radiation method
• Resection method
• Traversing

Answer explanation

Resection method locates station using rays drawn from known points.

Two-point problem in plane tabling requires:

• One known point
• Two known points
• Three known points
• No known point

Answer explanation

Two well-defined points are used in two-point problem.

The three-point problem can be solved by:

• Trial and error
• Mechanical method
• Graphical method
• All of these

Answer explanation

Three-point problem may be solved by mechanical, graphical or trial and error methods.