RCD 1 MINI QUIZ

What is the reduction factor for flexure of tension steel not yielding

• 0.65

• 0.75

• 0.90

• All of them

Minimum concrete cover for structures exposed to weather (ex. Exterior Beams and Columns)

• 40 mm

• 50 mm

• 75 mm

• 20 mm

What is the minimum modular ratio for tension steel reinforcement?

• 5

• 6

• 7

• 8

Maximum strain at the extreme compression fiber shall be assumed as

• 0.003

• 0.004

• 0.005

• 0.002

Which of the following is not a criteria for determining the length of the overhanging flange width for T-beams on each side of the web?

• 8h

• s/2

• Center-to-Center Length / 8

• Clear Span Length / 8

For continuous beams under gravity loadings, the negative moments are:

• near the supports

• near the center

• at every quarter point

• not present

Which of the following is a criteria to multiply a modification factor with the minimum depth values for either beams or one-way slabs as provided by the Code?

• length is less than 3 m

• doubly-reinforced

• normal-weight concrete

• Not Gr. 60 rebars

Which of the following is not a criteria for the minimum clear spacing for flexure and S&T bars?

• 25 mm

• 50 mm

• diameter of bar

• 4/3 diameter of aggregates

One requirement to use the approximate moment and shear table for continuous beams and one way slabs, is that the longer of the two adjacent spans does not exceed the shorter by more than:

• 10%

• 15%

• 20%

• 25%

A reinforced concrete rectangular beam has a width of 300 mm and an effective depth of 400 mm. Concrete strength, f’c = 28 MPa, and the steel yield strength fy = 280 MPa. What is the balanced steel ratio in percentage form (2 decimal places)