Civil war Day 20-LSGD-Engineering drawing topics

The angle which we can’t make using both the Set-squares is _____________

• 150°
• 105°
• 165°
• 125°

Answer explanation

The 45°–45° and 30°–60° set squares can form angles like 15°, 75°, 90°, 105°, 120°, 135°, and 150°, but 125° cannot be made using their combinations.

The ratio of area of A0 and A1 drawing sheet is

• 0.5
• 2
• 1.414
• 4

Answer explanation

The area of A0 is twice that of A1. Each smaller sheet in the ISO A-series has half the area of the previous size while maintaining the same aspect ratio (√2 : 1).

Instrument attached to the compass for drawing large sized circles

• Lengthening bar
• Bow compass
• Straight bar
• French curves

Answer explanation

A lengthening bar is attached to a compass to increase its radius, enabling the drawing of large circles accurately.

Clinograph is used for

• Horizontal lines
• Vertical line
• Inclined lines
• All the above

Answer explanation

clinograph is a drawing instrument used with T-squares to draw parallel, perpendicular, or inclined lines.

Which of the following lines are used to show that the object is cut and then viewed?

• Hidden lines
• Leader lines
• Centre lines
• Hatching Lines

Answer explanation

Hatching lines (or section lines) are drawn on cut surfaces to indicate that the object has been sectioned for internal view representation.

The superimposed running dimensioning starts with

• An open arrow
• Closed arrow
• Open circle
• Closed circle

Answer explanation

In superimposed running dimensioning, the first dimension line begins with an open circle to distinguish the starting point of the measurement.

Angle of lettering from horizontal for single stroke letters is

• 15°
• 25°
• 45°
• 75°

Answer explanation

The inclination of single-stroke lettering is kept at 75° to the horizontal, but the slant angle for guide lines from the vertical is 15°, i.e., letters are inclined 15° from the vertical (or 75° from the horizontal). Hence, the correct value from horizontal is 75°.

If 2.5 cm represents 5 hectometers, then what will be the representative factor?

• 1 : 20,000
• 20,000 : 1
• 2000 : 1
• 1 : 2000

Answer explanation

5 hectometers = 500 m = 50,000 cm. RF = length on drawing / actual length = 2.5 / 50,000 = 1 : 20,000.

What is the formula for calculating the length of the scale?

• Minimum length to be measured × R.F
• Minimum length to be measured ÷ R.F
• Maximum length to be measured ÷ R.F
• Maximum length to be measured × R.F

Answer explanation

The length of the scale is found by multiplying the maximum length to be measured by the representative fraction (R.F). Hence, Length = Maximum length × R.F.

When the drawing is made to the same size as the object that it represents the drawing obtained is

• Reduced scale drawing
• Half scale drawing
• Full scale drawing
• Enlarged scale drawing

Answer explanation

A full scale drawing represents the object at its actual size, where the scale ratio is 1:1.