1
GATE CE 1993
MCQ (Single Correct Answer)
+1
-0.3
Let $$jd$$ be the lever arm between the resultant tensile force $$T$$ in the reinforcing prestressing steel and the resultant compressive force $$C$$ in concrete of a reinforced / prestressed concrete beam. When subjected to increase in the external bending moment, which one of the following statements is true in reinforced and prestressed concrete beams?

In reinforced concrete beams

A
$$T$$ increases at a faster rate than $$jd$$
B
Both $$T$$ and $$jd$$ increases at the same rate
C
$$jd$$ increases at a faster rate than $$T$$
D
Neither $$T$$ nor $$jd$$ increases
2
GATE CE 1993
MCQ (Single Correct Answer)
+1
-0.3
Let $$jd$$ be the lever arm between the resultant tensile force $$T$$ in the reinforcing prestressing steel and the resultant compressive force $$C$$ in concrete of a reinforced / prestressed concrete beam. When subjected to increase in the external bending moment, which one of the following statements is true in reinforced and prestressed concrete beams?

In prestressed concrete beams

A
$$T$$ increases at a faster rate than $$jd$$
B
Both $$T$$ and $$jd$$ increases at the same rate
C
$$jd$$ increases at a faster rate than $$T$$
D
Neither $$T$$ nor $$jd$$ increases
3
GATE CE 1992
MCQ (Single Correct Answer)
+1
-0.3
The loss of prestress due to elastic shortening of concrete is least in
A
One wire pretensioned beam
B
One wire post-tensioned beam
C
Multiple wire pretensioned beam with sequential cutting of wires
D
Multiple wire post-tensioned beam subjected to sequential prestressing
4
GATE CE 1992
MCQ (Single Correct Answer)
+1
-0.3
A uniformly distributed load intensity, $$w$$ acting on a simply supported prestressed concrete beam of span $$L,$$ producing a bending moment $$M,$$ at mid-span is to be balanced by a parabolic tendon with zero eccentricity at ends and eccentricity $$e,$$ at mid-span. The prestressing force required depends on
A
$$w$$ and $$e$$
B
$$w$$ and $$L$$
C
$$L$$ and $$e$$
D
$$M$$ and $$e$$
GATE CE Subjects
Fluid Mechanics and Hydraulic Machines
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