Quiznetik
Structural Design 2 | Set 2
1. Creep of concrete in a structural member is due to
A. elastic strain
B. elasto-plastic strain
C. inelastic strain
D. plastic strain
Correct : C. inelastic strain
2. Shrinkage of concrete in a structural member is due to
A. dead load on the member
B. live load
C. loss of moisture and drying of concrete
D. both a and b
Correct : C. loss of moisture and drying of concrete
3. Modulus of elasticity of concrete is generally expressed in terms of
A. shear strength
B. compressive strength
C. tensile strength
D. torsional strength
Correct : B. compressive strength
4. Target mean strength of concrete depends upon
A. water/cement ratio
B. type of aggregate
C. characteristic strength of concrete
D. all of the above
Correct : C. characteristic strength of concrete
5. Workability of concrete is influenced significantly by
A. target mean strength
B. water/cement ratio
C. type of cement
D. all of the above
Correct : B. water/cement ratio
6. High-tensile steel is basically
A. low carbon steel
B. high manganese steel
C. high carbon steel
D. low nickel steel
Correct : C. high carbon steel
7. The creep coefficient depends upon the
A. span of the structural member
B. notional size of the member
C. depth of the member
D. none of the above
Correct : B. notional size of the member
8. In the case of prestressing steels, the highest stress is reached in
A. high-tensile steel wires
B. high-tensile steel bars
C. high-tensile strands
D. all of the above
Correct : C. high-tensile strands
9. In pretensioning system
A. the member is cast fist followed by tensioning of high-tensile wires
B. the member is prestressed by external anchors
C. the high-tensile wires are tensioned before placing concrete in forms
D. none of the above
Correct : C. the high-tensile wires are tensioned before placing concrete in forms
10. Curved cables can be used in
A. pretensioned members
B. externally pretressed member
C. post-tensioned member
D. all of the above
Correct : C. post-tensioned member
11. In long line method or pretensioning,
A. only one member can be cast
B. two members can be cast
C. several members can be cast
D. none of the above
Correct : C. several members can be cast
12. In post-tensioning system
A. wires are fist tensioned followed by concreting
B. tensioning of wires and concreting is simultaneously done
C. the wires are tensioned against hardened concrete
D. none of the above
Correct : C. the wires are tensioned against hardened concrete
13. Freyssinet system is based on the principle of
A. direct bearing on concrete from bolt heads at the end of wires
B. looping of the wires around concrete
C. wedge action producing frictional grip between steel and concrete
D. all of the above
Correct : C. wedge action producing frictional grip between steel and concrete
14. High-tensile bars threaded at ends are used in
A. freyssinet system
B. gifford–udall system
C. lee–mccall system
D. all of the above
Correct : C. lee–mccall system
15. Looping of high-tensile tendons around the concrete is used in
A. bbrv system
B. magnel–blaton system
C. baur–leonhardt system
D. none of the above
Correct : C. baur–leonhardt system
16. Tendon splices are required in
A. hoyer’s long line method of pretensioning
B. short span prestressed members
C. long span continuous members
D. all of the above
Correct : C. long span continuous members
17. In prestressed members requiring very large forces, the tendons preferred are
A. wires
B. bars
C. strands
D. none of the above
Correct : C. strands
18. The tendon splice preferred in the case of long span continuous prestressed members is
A. wrapped splice
B. clamp splice
C. torpedo splice
D. none of the above
Correct : C. torpedo splice