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.

Which of the following is used to improve the bond stress in RCC?

• Decrease beam depth
• Use epoxy bars
• Increase bar diameter
• Increase bar number

Answer explanation

Increasing the number of bars distributes stress and improves bond.

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.

Which formwork is most suitable for repeated use in mass housing projects?

• Timber
• Plywood
• Steel
• Aluminium

Answer explanation

Aluminium formwork is modular, lightweight and reusable, ideal for mass housing.

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.