Engineering Questions with Answers - Multiple Choice Questions
Load on Positive and Negative Projecting Conduits
1 - Question
Positive projecting conduits are of ___________ types.
a) 2
b) 5
c) 3
d) 4
View Answer
Answer: d
Explanation: Positive projecting conduits are of four types: i) complete ditch conditions ii) complete projection conduits iii) incomplete ditch conduit iv) incomplete projection conduits.
2 - Question
The settlement ratio for a negative projecting conduit is __________
a) Always positive
b) Always negative
c) Negative in some cases
d) None of the mentioned
View Answer
Answer: b
Explanation: The settlement ratio for negative projecting conduits is always negative since the settlement of the critical plane is more than the settlement of the natural ground.
3 - Question
The magnitude and direction of relative movements between the interior and exterior prisms of the conduits are dependent upon the ___________
a) Settlement ratio
b) Projection ratio
c) Settlement of conduits
d) Compressive strain
View Answer
Answer: a
Explanation: The magnitude and direction of relative movements are dependent upon the settlement ration rsd defined by the equation:
rsd = (sm + sg) – (sf + dc)/sm.
4 - Question
Critical plane in conduit is located at ___________
a) Tangential to the top of the conduit
b) Tangential to the bottom of the conduit
c) Centre of the conduit
d) All of the mentioned
View Answer
Answer: a
Explanation: The critical plane is a horizontal plane, located tangential to the top of the conduit.
5 - Question
If the critical plane settles more than the top of the conduit, the settlement ratio is __________
a) Zero
b) Negative
c) Positive
d) Unity
View Answer
Answer: c
Explanation: If the critical plane settles more than the top of the conduit i.e. if (sm + sg) is more than (sf + dc) the settlement ratio is positive.
6 - Question
Both the projection condition and the ditch conditions of a positive projecting conduit may be __________
a) Complete
b) Incomplete
c) All of the mentioned
d) None of the mentioned
View Answer
Answer: c
Explanation: Depending upon the position of plane of equal settlement, both the projection conditions and the ditch conditions of a positive projecting conduit may be complete or incomplete.
7 - Question
If the plane of settlement does not fall within the embankment, then such a condition is called _________
a) Complete ditch condition and Complete project condition
b) Incomplete ditch condition
c) None of the mentioned
d) All of the mentioned
View Answer
Answer: a
Explanation: If the embankment is not of sufficient height, the plane of equal settlement does not fall within the embankment (i.e., He > H); such a condition is called complete projection condition or complete ditch condition.
8 - Question
The sign used for complete projection is __________
a) +
b) –
c) No sign is used
d) None of the mentioned
View Answer
Answer: a
Explanation: Since + is used for positive settlement ratio, (+) sign is used for complete projection and (–) sign used for complete ditch condition.
9 - Question
The recommended value of settlement ratio for embankment, to use in design is __________
a) +0.5
b) +1.0
c) – 0.3
d) – 0.4
View Answer
Answer: b
Explanation: The value of rsd for embankment of rigid conduit type is +1.0, which can be used for any ordinary rock hard, hard or unyielding soil as foundation soil.
10 - Question
The load on a negative conduit is given by the equation __________
a) Wc = Cn γ Bd
b) Wc = Cn γ Bd2
c) Wc = γ Bd
d) Wc = Cn Bd2
View Answer
Answer: b
Explanation: The load on the conduit is given as WC = Cn γ Bd2, where Cn= load coefficient for negative projecting conduit.