An imaginary line tangential to the longitudinal curve of the bubble tube at its middle point is called

Related MCQs

• If altitude bubble is provided both on index frame as well as on telescope of a theodolite, then the instrument is levelled with reference to i) altitude bubble on index frame ii) altitude bubble on index frame if it is to be used as a level iii) altitude bubble on telescope iv) altitude bubble on telescope if it is to be used as a level The correct answer is
• An imaginary line tangential to the longitudinal curve of the level at the centre of the tube is called
• An imaginary line joining the point of intersection of the cross-hairs of the diaphragm and the optical centre of the object glass, is known as
• The sensitivity of a bubble tube can be increased by
• With the rise of temperature, the sensitivity of a bubble tube
• The axis of bubble tube must be perpendicular to the vertical axis.
• The fundamental requirement of the spiral curve is that its radius of curvature at any point shall vary inversely as the distance from the beginning of the curve.
• A vertical line at any point is a line normal to the level surface at the point.
• An imaginary line lying throughout the surface of ground and preserving a constant inclination to the horizontal is known as
• An imaginary line joining the points of equal elevation on the surface of the earth, represents