RCC Structures Design MCQ Practice Questions (Civil Eng) Set 1

In a prestressed beam carrying an external load W with a bent tendon is having angle of inclination ? and prestressed load PThe net downward load at the centre is:

Options are :

• W - 2P cos ?
• W - 2P sin ?
• W - P cos ?
• W - P sin ?
• W + 2P sin ?

Answer :W - 2P sin ?

The number of treads in a flight is equal to:

Options are :

• None of these
• Risers in the flight
• Risers plus one
• Risers minus one

Options are :

• 8 m
• 3 m
• 6 m
• 4 m
• 5 m

Options are :

• 10 kg/cm^(2)
• 20 kg/cm^(2)
• 25 kg/cm^(2)
• 15 kg/cm^(2)

The minimum cube strength of concrete used for a prestressed member, is:

Options are :

• 350 kg/cm^(2)
• 250 kg/cm^(2)
• 150 kg/cm^(2)
• 50 kg/cm^(2)
• 400 kg/cm^(2)

The amount of reinformcement for main bars in a slab, is based upon:

Options are :

• Minimum shear force
• Minimum bending moment
• Maximum shear force
• Maximum bending moment

Pick up the incorrect statement from the following:

Options are :

• In the heel slab of a retaining wall, rein forcement is provided at the top of the slab
• In the stem of a retaining wall, reinforcement is provided near the earth side
• In the toe slab of a retaining wall, rein forcement is provided at the bottom of the slab
• None of these

Options are :

• C
• B
• A
• D
• E

For initial estimate for a beam design, the width is assumed:

Options are :

• 1/15th of span
• 1/40th of span
• 1/20th of span
• 1/30th of span
• 1/25th of span

Options are :

• 35
• 50
• 60
• 30
• 40

The effective width of a column strip of a flat slab, is:

Options are :

• None of these
• Half the width of the panel
• Diameter of the column
• One-fourth the width of the panel

Answer :Half the width of the panel

Options are :

• 48 d
• 58 d
• 28 d
• 38 d
• 95 d

Options are :

• D
• A
• B
• C
• E

The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon:

Options are :

• Overall thickness of the rib
• Centre to centre distance between T-beams
• Span of the T-beam
• All the above

Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than:

Options are :

• 42 diameters from the outer edge of the column
• 42 diameters from the centre of the column
• 24 diameter from the centre of the column
• 42 diameters from the inner edge of the column

Answer :42 diameters from the outer edge of the column

Options are :

• 2800/C^(2)
• 2300/2C
• 2800/C
• 2800/3C

A short column 20 cm x 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cmIf permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed:

Options are :

• 41, 200 kg
• None of these
• 412, 000 kg
• 4120 kg

In a combined footing if shear stress exceeds 5 kg/cm^(2), the nominal stirrups provided are:

Options are :

• None of these
• 8 legged
• 12 legged
• 10 legged
• 6 legged

Options are :

• E
• B
• A
• D
• C

As per I.S. 456 - 1978, the pH value of water shall be:

Options are :

• Equal to 6
• Not less than 6
• Less than 6
• Equal to 7

The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt:

Options are :

• needs redesigning
• is safe in shear
• is unsafe in shear
• is over safe in shear

The transverse reinforcements provided at right angles to the main reinforcement:

Options are :

• Resist the temperature stresses
• All the above
• Resist the shrinkage stress

The thickness of base slab of a retaining wall generally provided, is:

Options are :

• One-third of the width of the stem at the bottom
• One half of the width of the stem at the bottom
• Width of the stem at the bottom
• Twice the width of the steam at the bottom
• One fourth of the width of the steam at the bottom

Answer :Width of the stem at the bottom

High strength concrete is used in prestressed member:

Options are :

• To overcome high bearing stresses developed at the ends
• All the above
• To ovecome bursting stresses at the ends
• To overcome cracks due to shrinkage
• To provide high bond stresses

Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by:

Options are :

• Grashoff formula
• Rankine-Marcus formula
• Rankine formula
• Rankine Grashoff formula
• Marcus formula

Options are :

• 2
• 4
• 3
• 5
• 1

Options are :

• 40
• 60
• 55
• 45
• 50

Options are :

• A
• E
• C
• B
• D

A foundation rests on:

Options are :

• None of these
• Base of the foundation
• Foundation soil

The diameter of longitudinal bars of a column should never be less than:

Options are :

• 6 mm
• 10 mm
• 12 mm
• None of these
• 8 mm