Unit 1 c

4 + 2g + 5g = -66

• -5

• -19

• 0

• -10

8(e – 5) = 2(3e – 8), e=

• 11

• 11.5

• 12

• 12.4

32. -3(2h – 4) = 20 – 4h, h=

• -4

• -5

• -2

• 0

The original thickness of the concrete floor slab was 350mm. During a test a load applied to the concrete compressed it by 20mm. Calculate the modulus of elasticity with the following information

Size = 67 x 32 mm

The tensile load = 75 KN  

Calculate stress, strain and modulus.

• Stress= 56 n/mm2

  Strain= 0.6571

  Modulus= 412.61n/mm2

• Stress= 58 n/mm2

  Strain= 0.8571

  Modulus= 455.61n/mm2

• Stress= 34.98 n/mm2

  Strain= 0.0571

  Modulus= 612.61 n/mm2

• Stress= 33 n/mm2

  Strain= 022571

  Modulus= 312.61 n/mm2

(

• 22,000m²

• 25,000m²

• 23,563m²

• 54,325m²

• RA = 2.3kN

• RA = 2.0kN

• RA = 3.5kN

• RA = 2.5kN

The gym has LED lamps attached to the ceiling by 1500 mm long steel

suspension cables.

Suspension cables attached to the LED lamps extend by 5 mm.

Calculate the strain in one steel cable when a LED lamp is attached.

• Strain = 0.002

• Strain = 0.003

• Strain = 0.005

• Strain = 0.023

Calculate the cross sectional area of the reinforced concrete pier.

• 36.5 m²

• 32.5 m²

• 35.5 m²

• 34.5 m²

Calculate RA and RC

• RA=50

  RC=30

• RA=24

  RC=56

• RA=56

  RC=24

• RA=40

  RC=40