127. The negative sign is assigned to

A. reduction to mean sea level

B. correction for horizontal-alignment

C. correction for slope

D. all the above.

128. Pick up the correct statement from the following :

A. If the applied tension to the tape is more than the standard, the tension correction is positive

B. If the applied tension to the tape is less than the standard, the tension correction is negative

C. If the temperature during measurement is greater than the standard temperature, the temperature correction is positive

D. All the above.

129. The station where observations are not made, but the angles at the station are used in triangulation series, is known as

A. satellite station

B. subsidiary station

C. pivot station

D. main station.

130. The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as

A. satellite station

B. eccentric station

C. false station

D. pivot station.

131. Systematic errors

A. always follow some definite mathematical law

B. can be removed by applying corrections to the observed values

C. either make the result too great or too small

D. all the above.

132. Accidental errors

A. do not follow any definite mathematical law

B. cannot be removed by applying corrections to the observed values

C. are generally small

D. all the above.

133. The equation which is obtained by multiplying each equation by the coefficient of its un-knowns and by adding the equations thus formed, is known as

A. observation equation

B. conditional equation

C. normal equation

D.(d ) none of these.

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