Number 1 Intrebari beton
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Transcript of Number 1 Intrebari beton
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8/11/2019 Number 1 Intrebari beton
1/2
Number 1
1. The failure of concrete in compression is produced by cracks:a. Parallel with the force direction;
b. Perpendicular on the force direction;c. Inclined after the neutral axis.
2. The compressive strength is determined at:a. 1 daysb. 28 days
c. !" days#. $ompressive strength of concrete is computed %ith relation:
a. Rc=Pr/Ab
b. &c'P(ac. &c'2Pr()b
. *ailure of concrete in axial tension is produced by:a. tangential stressesb. tensile stresses
c. compressive transversal stresses+. The relation for determining split tensile strength is:
a. Rtd= 2Pr/ DL
b. &td' Pr(, -c. &td' 2Pr(,
/. )t failure in bending the concrete sho%s:a. t%o cracksb. more cracksc. one crack
0. In torsion concrete is subected to:a. tangential stressesb. tensile stresses
c. compressive stresses. 3hrinkage of concrete occurs %hen:
a. concrete hardens in %aterb. concrete hardens in air
c. concrete is protected during hardening
!. The relation for determining the modulus of deformation isa. 4bp' tg5rb. 4bp' tg6c. Eb= t!"
1". The creep of concrete is:a. defor#ation in ti#e $nder constant load;
b. force that produce deformationc. cracking in time
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8/11/2019 Number 1 Intrebari beton
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11. The steel for reinforced concrete can be used as:a. resistant and constr$cti%e reinforce#ent
b. independent resistant barsc. constructive mesh
12. 3trands are reali7ed of:
a. + %iresb. & wires
c. ! %ires1#. 8ond bet%een concrete and steel is reali7ed by:
a. !ri' stickin! and friction
b. grip and frictionc. adherence and friction
1. 9orking stages for tensioned members: in second stage the concrete is:a. cracked on the entire sectionb. cracked in the compressed 7onec. artial cracked in the tension (one
1+. The failure of beams is produced by:a. the yielding of reinforcement and displacementb. the yieldin! of reinforce#ent and cr$shin! of co#ressed concrete
c. high displacement in the span and cracks1/. The cracks in the tension 7one of beams are:
a. nor#al and inclined
b. inclinedc. normal and hori7ontal
10. embers that are subected to bending are:a. bea#s and slabs
b. beams and columnsc.
beams and arches1. The relation for fcdis:a. fcd'5fck(cb. fcd'fck(cc. fcd'5fc(c
1!. The doubly reinforced rectangular section has:a. 3teel in compression 7oneb. 3teel in compression 7one and tension 7onec. 3teel in tension 7one
2". The ultimate moment capacity of a singly reinforced rectangular section is:a. caps.r' *c?*s?< x=