Explanation

• A 20 m metric chain has 100 links.
• Therefore, the length of each link is 20 cm.
• Each link is connected by small rings.
• Metric chains are commonly used in land surveying.

Explanation

• An invitation to contractors to do works or supply materials, with a time limit and total cost, is called a tender

Additional information

• Estimate: Preliminary cost calculation.
• Contract: Signed legal agreement
• Specification: Detailed material and work requirements

Explanation

• Work-charged works: Paid directly from the specific project's funds.

Additional information

• Deposit works: Funded by an external agency or depositor.
• Annual works: Routine, yearly maintenance tasks.
• Departmental works: Executed directly by the government department's own labor.

Explanation

• An accident caused by a short-circuit of electricity is called a fire accident
• Because electrical faults produce sparks and heat that start fires.

Additional information:

Accident Types

• Mechanical: Caused by moving parts or machinery.
• Chemical: Caused by dangerous substances or toxic leaks
• Natural: Caused by weather or earth movements.

Explanation

• Curing: Keeping concrete moist to ensure full strength development.

Additional information 

• Compaction: Removing trapped air bubbles to densify the mix.
• Mixing: Blending cement, aggregates, and water into a uniform paste
• Finishing: Levelling and smoothing the concrete surface after placement.