D46 CHECK YOUR LEVEL

Which meridian changes its position with time?

• True meridian
• Arbitrary meridian
• Magnetic meridian
• All the above

Answer explanation

Magnetic meridian changes with time due to the variation in the Earth's magnetic field.

The bearing measured clockwise from the north line to the survey line is called:

• Fore bearing
• Back bearing
• Whole Circle Bearing
• Quadrantal Bearing

Answer explanation

Whole Circle Bearing is measured clockwise from the north reference line from 0° to 360°.

Representative fraction (RF) of a map where 1 cm represents 100 m is:

• 1/100
• 1/1000
• 1/10000
• 1/100000

Answer explanation

RF = 1cm / 100m = 1 / 10,000

Assertion (A): The duty of irrigation water increases downstream. Reason (R): Losses reduce as water approaches the field.

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

Answer explanation

As water moves downstream, intermediate losses reduce, so duty appears higher.

Plasticity is the property of a material to:

• Regain original shape
• Break under shock
• Undergo permanent deformation
• Resist temperature

Answer explanation

Plasticity is the ability to retain a deformed shape without failure.

In compass surveying, the bearing observed opposite to the direction of progress is called:

• Fore bearing
• True bearing
• Back bearing
• Magnetic bearing

Answer explanation

Back bearing is taken in the direction opposite to the survey line.

Delta is expressed in terms of:

• hectare
• cubic metre
• cm or m
• litres

Answer explanation

Delta is the total depth of water applied over the base period in cm or m.

The function of agate cap in a prismatic compass is to:

• Support sight vane
• Protect needle pivot
• Balance magnetic field
• Calibrate ring

Answer explanation

Agate cap acts as a hard, wear-resistant pivot bearing for the magnetic needle.

Which property defines the material’s resistance to scratching and penetration?

• Toughness
• Hardness
• Elasticity
• Ductility

Answer explanation

Hardness is the resistance to surface indentation and scratching.

Which of the following allows the most repetitions in concrete construction?

• Timber formwork
• Plastic formwork
• Plywood formwork
• Steel formwork

Answer explanation

Steel formwork is reusable up to 50-100 times, ideal for repeated construction.