McqMate
| 101. |
Creep of concrete in a structural member is due to |
| A. | elastic strain |
| B. | elasto-plastic strain |
| C. | inelastic strain |
| D. | plastic strain |
| Answer» C. inelastic strain | |
| 102. |
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 |
| Answer» C. loss of moisture and drying of concrete | |
| 103. |
Modulus of elasticity of concrete is generally expressed in terms of |
| A. | shear strength |
| B. | compressive strength |
| C. | tensile strength |
| D. | torsional strength |
| Answer» B. compressive strength | |
| 104. |
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 |
| Answer» C. characteristic strength of concrete | |
| 105. |
Workability of concrete is influenced significantly by |
| A. | target mean strength |
| B. | water/cement ratio |
| C. | type of cement |
| D. | all of the above |
| Answer» B. water/cement ratio | |
| 106. |
High-tensile steel is basically |
| A. | low carbon steel |
| B. | high manganese steel |
| C. | high carbon steel |
| D. | low nickel steel |
| Answer» C. high carbon steel | |
| 107. |
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 |
| Answer» B. notional size of the member | |
| 108. |
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 |
| Answer» C. high-tensile strands | |
| 109. |
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 |
| Answer» C. the high-tensile wires are tensioned before placing concrete in forms | |
| 110. |
Curved cables can be used in |
| A. | pretensioned members |
| B. | externally pretressed member |
| C. | post-tensioned member |
| D. | all of the above |
| Answer» C. post-tensioned member | |
| 111. |
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 |
| Answer» C. several members can be cast | |
| 112. |
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 |
| Answer» C. the wires are tensioned against hardened concrete | |
| 113. |
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 |
| Answer» C. wedge action producing frictional grip between steel and concrete | |
| 114. |
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 |
| Answer» C. lee–mccall system | |
| 115. |
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 |
| Answer» C. baur–leonhardt system | |
| 116. |
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 |
| Answer» C. long span continuous members | |
| 117. |
In prestressed members requiring very large forces, the tendons preferred are |
| A. | wires |
| B. | bars |
| C. | strands |
| D. | none of the above |
| Answer» C. strands | |
| 118. |
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 |
| Answer» C. torpedo splice | |
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