SSC JE 2019-20: Technical Quiz 78

A curve is laid with a 30 m long chain such that chainage at T₁ is found to be 1545.32 m and length of the curve is 545 m. Calculate the number of full chords required for setting of curve.

Consider the following statements:

(i) Weight of a quantity is directly proportional to number of times the quantity is measured.

(ii) Weights are assigned to an observation as per the accuracy and precision with which the observations are made.

(iii) If the observation is repeated large number of times, weight is proportional to the square of probable error in measurement.

(iv) The corrections to be applied to observed quantities is directly proportional to their weights.

Which of the above statements are correct?

Statement (I): Geodetic survey cannot be done for works requiring high precision.

Statement (II): The curvature of earth is accounted for measurements in Geodetic survey.

Which of the following statements are true regarding compensating errors?

(i) They tend to accumulate with increase in number of observations.

(ii) They are mainly caused by limitations of instrument and observer.

Maximum length of offset depends upon

i. Degree of accuracy required

ii. Scale of plotting

iii. General layout of chain line

iv. Nature of ground

Consider the following statements regarding internal rate of return (IRR)

1) IRR is also known as yield on investment method.

2) Project is economically viable when IRR is less than interest rate.

3) It considers inflation effect on net present value.

Which of the above statements are correct?

Consider the following statements

1) For chlorination of water, pH is kept between 5-7.

2) Chlorine will react with ammonia present in water and form trichloramine when pH of water is greater than 7.5

3) Presence of metal compound increases the efficiency of chlorination.

Which of the above statements are correct?

Consider the following statements

1) The fastener which is farthest from the centre of gravity of fastener group and farthest from the applied load line is the most “critical” one

2) The fastener which is farthest from the centre of gravity of fastener group and nearest to the applied load line is the most critical one

3) Two conditions are possible (2 possible ways) of analyzing the eccentric riveted connection i.e. (i) when moment and plane of fastener in same plane

(ii) When moment and plane of fasteners are in mutually perpendicular planes.

Which of the above statements are correct?

Statement (I): ‘Compreg’ timbers have higher specific gravity of up to 1.30 and are stronger than other timbers.

Statement (II): Impregnation of resins and special curing methods are adopted to develop ‘Compreg’ timbers.

Statement (I): In A-O-A network, there can not be more than one initial node.

Statement (II): In A-O-N network, there can not be more than one initial node.