Unit - 5
121. The prestressed concrete slab systems are ideally suited for
a. Columns
b. Roofs
c. Slabs
d. Beam
122. The precast prestressed hollow core slabs, with or without topping is an important structural element in __
a. Aquariums
b. Structures
c. Industries
d. Nurseries
a. False
b. True
124. One way slabs may be supported across the entire width of the slab by means of
a. Columns
b. Footings
c. Ridges
d. Piers
125. BThe simple or continuous slabs are analyzed for y constructing which structure we can help the fish in their migration?
a. Design foundation
b. Design reinforcement
c. Design slab
d. Design moments
126. The design of a two-way-slab supported on all four sides involves the computation of
a. Cross sections
b. Deformations
c. Bending moment
d. Moments
127. The moment coefficients derived from the ultimate load method are generally lower in _
a. Magnitude
b. Strength
c. Eccentricity
d. Span
128. A simple prestressed flat slab is generally supported by a network of
a. Spans
b. Beams
c. Columns
d. None of above
129. The proportioning of tendons in design of prestressed concrete simple flat slab between the column and middle strips may be based on
a. Loads
b. Moments
c. Codes
d. Deflections
130. The design principles of continuous flat slab floors are similar to
a. Continuous
b. Deformed
c. One way slab
d. Two way slab
131. The peripheral ring beam is prestressed by which type of wire winding?
a. Circular
b. Curved
c. Elliptical
d. Trapezoidal
132. The spherical domes are supported by a ring beam at the
a. Middle
b. Start
c. Both a and b
d. Base
133. The folded plate is also analyzed for
a. Transverse
b. Straight
c. Longitudinal
d. both a & c
134. Fold plates are widely used for Roofs.
a. False
b. True
135. The hyperbolic parabolic shells, grouped under the category of
a. Singly curved shells
b. Four curved shells
c. Three curved shells
d. Doubly curved shells
a. Parabola equation
b. Moment equations
c. Ellipse equation
d. Differential equation
137. The rigorous methods generally involve computations to estimate the
a. Redundant reactions
b. Span reactions
c. Longitudinal reactions
d. Transverse reactions
138. The analysis of circular cylindrical shells with prestressed edge beam is more or less similar to
a. Prestressed concrete beam
b. Partially prestressed beam
c. Chemically prestressed beam
d. Reinforced concrete beam
139. The investigations by Marshall have shown that prestressing considerably reduces transverse moment.
a. True
b. False
140. In general, concrete shells have thin cross sections, which prectude the use of large diameter?
a. Lens
b. Wires
c. Bars
d. Cables
141. The compressive state of stress in the shell membrane results in which construction?
a. Airtight construction
b. Soffit construction
c. Water tight construction
d. Lever construction
142. The parabolic profile of the cables in the edge beam counteracts the
a. Tension
b. Compression
c. Deflection
d. Deformation
143. Long spans exceeding 30m necessitate is?
a. Blocking
b. Anchoring
c. Welding
d. Spinning
144. Reinforced concrete shells are ideally suited to cover floor spaces of up to
a. 50 m
b. 40 m
c. 20 m
d. 30 m
145. The concrete shell roof has been widely used to cover
a. Small floor spaces
b. Edge floor spaces
c. Middle span spaces
d. Large floor spaces
146. The prestressed concrete poles are currently used in
a. Current
b. Heat
c. Mass
d. Wave
147. The appearance of prestressed concrete poles is
a. None of these
b. Black
c. Greesy
d. Clean
148. The maximum moment of resistance in a pole is generally required at
a. Edge
b. Middle
c. Corner
d. Base
149. The prestressed concrete poles for power transmission lines are generally designed as members with
a. Partial pressure
b. Chemical prestress
c. Total prestress
d. Uniform prestress
150. What is the reason to provide silt excluder?
a. Decreased
b. Increased
c. Bended
d. Equal
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