Civil Engineering MCQs

Page No. 122

The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?


awagon drill, churn drill, shot drill


bwagon drill, shot drill, churn drill


cshot drill, churn drill, wagon drill


dchurn drill, wagon drill, shot drill



Drifters can be used to drill_________________?


aonly up holes


bonly down holes


chorizontal or up holes


d horizor„al, down or up holes



A good blast with a good yield is obtained if the cut hole is___________________?


anormal to face


b inclined at 45° to the face


c inclined at 15° to the face


dinclined at 30° to the face



PERT technique of network analysis is mainly useful for__________________?


a small projects


b large and complex projects


cresearch and development projects


d deterministic activities



Select the correct statement?


aActivity arrows in a CPM network are drawn to scale


bThe tail of an arrow represents the finish of an activity


c Arrow bead represents the start of an activity


d none of the above


View Answer none of the above

In PERT analysis, the time estimates of activities and probability of their occurrence follow_______________?


anormal distribution curve


b Poisson’s distribution curve


cBeta – distribution curve


dnone of the above



Earliest finish of an activity is always_______________?


a greater than earliest event time of the following node


b less than earliest event time of the following node


c less than or equal to earliest event time of the following node


d greater than or equal to earliest event time of the following node



In the network shown in Fig. (15 fig) the latest start time of an activity 4-5 is_________________?


a2


b4


c8


d7


View Answer 4

If an activity has its optimistic, most likely and pessimistic times as 2, 3 and 7 respectively, then its expected time and variance are respectively___________________?


a3.5 and 5/6


b5 and 25/36


c 3.5 and 25/36


d4 and 5/6


View Answer 3.5 and 25/36

Free float is mainly used to_________________?


aidentify the activities which can be delayed without affecting the total float of preceding activity


bidentify the activities, which can be delayed without affecting the total float of succeeding activity


cestablish priorities


d identify the activities which can be delayed without affecting the total float of either the preceding or succeeding activities



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