Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 10 Minutes
Q1. While estimating for plastering, usually no deduction is made for –
(a) Ends of beams
(b) Small opening upto 0.5 sq. m.
(c) End of rafters
(d) All the above
Q2. The process of applying cement mortar under pressure through a nozzle is called:
Q3. The factor of safety for steel as compared to concrete is ……………
(d) None of these
Q4. Generally, strength of concrete is considered negligible/ very low in
(d) None of the above
Q5. A fully saturated soil has a water content of 200 percent. If G = 2.6, the void ratio is:
(d) None of these above
Q6. A fluid in which resistance to deformation is independent of the shear stress, is called ___________.
(a) Bingham plastic fluid
(b) Pseudo plastic fluid
(c) dilatant fluid
(d) Newtonian fluid
Q7. A column that fails due to direct stress, is called:
(a) short column
(b) long column
(c) weak column
(d) medium column
Q8. A first class brick when immersed in cold water for 24 hours should not absorb water more than:
(a) 15 %
Q9. The initial setting time for quick cement is
(a) 5 seconds
(b) 5 minutes
(c) 5 hours
(d) 5 days
Q10. According to IS : 456 – 2000 side-face reinforcement should be provided when depth of web of a beam exceeds.
(a) 650 mm
(b) 700 mm
(c) 725 mm
(d) 750 mm
Plastering is measured in terms of m².If,
(a) opening area < 0.5 m² (No deduction is applied)
(b) opening area is between 0.5 m² – 3m², then (single side deduction is applied)
(c) opening area > 3 m², then (double side deduction is applied)
Sol. The process of applying cement mortar under pressure through a nozzle is called Guniting . The machine which is used for guniting is called cement gun. It apply a pressure of 2.5 kg/cm² – 3.5 kg/cm² through nozzle.
Sol. factor of safety of steel ⇒1.15
Factor of safety of concrete ⇒ 1.5
→ Due to variability in strength of concrete due to poor quality control, poor work man ship etc, higher factor of safety is given for concrete in comparison to steel.
S4. Ans.(c) → The strength of concrete in fatigue is negligible.
→ Strength of concrete in tension is 10 to 15% of compressive strength.
Sol. water content (w) = 200%
Void Ratio (e) = ?
→ soil is fully saturated (S = 1)
Se = WG
1×e = 2×2.6
Sol. For Newtonian fluid there is constant viscosity for different fluid at particular temp which resist the deformation without any influence of shear stress. In other word dynamic viscosity is constant for particular fluid at particular temp.
Sol. The short column fails primarily due to direct stress because in short column the buckling stresses are very small compared to direct stresses.
Sol. A first class brick when immersed in water for 24 hours should not absorb water more than 20% While second class brick should not absorb more than 22% water when immersed in water for 24 hours.
Sol. the initial setting time and final setting time for quick settling cement is 5 min. and 30 min respectively. it is produced by adding aluminium sulphate in very fine powdered form.
Sol. when depth of the beam exceeded 750 mm or depth of the beam exceeded 450 mm & Torsion is also applied then side face reinforcement of 0.1% of gross area (BD) must be provided. Its spacing not more then 300 mm or width of beam.