D55 CHECK YOUR LEVEL

Which set square is used to draw lines at 30°, 60° angles?

• 45°-45° set square
• Clinograph
• 30°-60° set square
• Protractor

Answer explanation

The 30°–60° set square is specifically used to draw lines at 30° and 60° angles.

Which shortcut key is used for the OFFSET command in AutoCAD?

• O
• OF
• OS
• OFF

Answer explanation

The OFFSET command in AutoCAD is initiated by typing 'O' and pressing Enter.

What is the typical thickness of Roman roads?

• 250 mm
• 300 mm
• 750 mm to 1.2 m
• 1.5 m

Answer explanation

Roman roads were built with large foundation stones and had a total thickness of 0.75 to 1.2 meters.

Which of the following measures the hardness of a material?

• Izod test
• Rockwell test
• Fatigue test
• Impact test

Answer explanation

Hardness is measured by tests like Brinell, Rockwell, and Vicker's. Rockwell is one of the popular ones.

Which level has a non-reversible telescope?

• Dumpy level
• Wye level
• Cooke’s reversible level
• Cushing’s level

Answer explanation

Dumpy level is a non-reversible level, meaning the telescope cannot rotate vertically.

Assertion (A): Macadam roads are considered modern roads. Reason (R): Macadam construction uses broken stones instead of large foundation stones.

• Both A and R are true and R is the correct explanation of A
• Both A and R are true but R is not the correct explanation of A
• A is true but R is false
• A is false but R is true

Answer explanation

Macadam replaced heavy foundation stones with broken stones, introducing modern road principles.

What is the specific heat defined as?

• Mass per unit volume
• Resistance to heat flow
• Heat needed to raise temp of 1kg by 1°C
• Thermal conductivity

Answer explanation

Specific heat is the quantity of heat required to raise the temperature of 1 kg of material by 1°C.

Which AutoCAD function key is used to turn ORTHO mode on/off?

• F6
• F7
• F8
• F9

Answer explanation

F8 toggles ORTHO mode in AutoCAD, which restricts cursor movement to horizontal or vertical.

Which polygon has all internal angles of 108°?

• Pentagon
• Hexagon
• Heptagon
• Octagon

Answer explanation

A regular pentagon has five equal sides and each internal angle is 108°.

Which benchmark is established by Survey of India?

• Arbitrary BM
• Temporary BM
• Permanent BM
• GTS BM

Answer explanation

GTS benchmarks are established by the Survey of India and are used for accurate leveling.