The correction for sag is

Related MCQs

• The error in measured length due to sag of chain or tape is known as
• Refraction correction
• Correction required for curvature for a distance of 1500 m is….
• Correction required for refraction for a distance of 10 km is….
• Combined correction for curvature and refraction for 800 m distance is……
• In levelling, the correction for combined curvature and refraction (in metres) is equal to
• The correction to be applied to each 30 m chain for a line measured along a slope of ? is
• In levelling, the correction for curvature (in metres) is equal, where D = Distance from the level to the staff reading in kilometres.
• The correction to the measured length will be negative when the chain is held on the ground sloping upwards.
• When the effect of refraction is taken into account in levelling, the true staff reading is obtained by subtracting the correction for refraction from the observed staff reading.