D42 CHECK YOUR LEVEL

What is the principle used in GPS to determine position?

• Triangulation
• Trilateration
• Interpolation
• Rectification

Answer explanation

GPS uses the principle of Trilateration to determine positions by intersecting distances from multiple satellites.

Which component of a cantilever retaining wall acts like a vertical cantilever under lateral earth pressure?

• Heel
• Toe
• Stem
• Weep hole

Answer explanation

The stem is the upright part of a cantilever retaining wall and acts like a vertical cantilever resisting lateral earth pressure.

Which IS code covers general construction in steel structures?

• IS 456
• IS 800
• IS 875
• IS 3370

Answer explanation

IS 800 is the code of practice for use of structural steel in general building construction.

Which method of seasoning uses high frequency current for rapid drying?

• Water seasoning
• Kiln seasoning
• Electrical seasoning
• Boiling

Answer explanation

Electrical seasoning uses high frequency alternating current for rapid drying of timber.

What is the trimmed size of an A2 drawing sheet?

• 420 x 594 mm
• 594 x 841 mm
• 210 x 297 mm
• 297 x 420 mm

Answer explanation

A2 drawing sheets have a trimmed size of 420 x 594 mm.

In a one-way slab, what is the typical effective depth provided for a span up to 1 m with 500 kg/m² load?

• 2 cm
• 4 cm
• 6 cm
• 8 cm

Answer explanation

Effective depth of 4 cm is recommended per meter span for loading up to 500 kg/m² in one-way slabs.

Which component of the railway track transfers loads from rails to ballast?

• Rail
• Sleeper
• Ballast
• Subgrade

Answer explanation

Sleepers transfer the load from rails to the ballast.

Which type of canal alignment is most economical and requires the least cross drainage works?

• Contour Canal
• Ridge Canal
• Side Slope Canal
• Navigation Canal

Answer explanation

Ridge canals run along the watershed line and require fewer cross drainage works, making them economical.

Which of the following is a defect in timber due to fungi?

• Knot
• Blue stain
• Twist
• Wane

Answer explanation

Blue stain is caused by fungal action in sap wood, leading to a bluish discoloration.

Which type of vernier has its scale division less than the main scale division?

• Backward vernier
• Extended vernier
• Direct vernier
• Double vernier

Answer explanation

Direct vernier or forward vernier has its vernier scale division less than the main scale division.