Practice Test: Question Set - 10
1. The reinforcing bars in beams are not bundled in contact if the diameter of the bars, exceeds
- (A) 12 mm
- (B) 35 mm
- (C) 30 mm
- (D) 36 mm
2. The minimum thickness of the web plate for a crane gantry plate girder with a lifting load exceeding 15 tonnes, is
- (A) 4 mm
- (B) 5 mm
- (C) 6 mm
- (D) 8 mm
3. The anchorage value of standard U-type hook of a reinforcing bar of diameter d in tension, is
- (A) 4 d
- (B) 8 d
- (C) 12 d
- (D) 16 d
4. As per IS : 1982, the permissible axial tension in rolled I-beams and channels, is
- (A) 1500 kg/cm2
- (B) 1800 kg/cm2
- (C) 1400 kg/cm2
- (D) 1420 kg/cm2
5. The ratio of minimum compressive strength on 15 cm cubes prepared with the concrete of M 20 grade and M 40 grade, at 7 days should be at least
- (A) 1/3
- (B) 1/2
- (C) 3/2
- (D) 2.0
6. For concreting of shallow sections with vibration, the work ability of concrete should be
- (A) Very low
- (B) Low
- (C) Medium
- (D) High
7. The approximate value of torsion constant k for a box of depth d, width b, and having uniform thickness t, is
- (A) 2dbt/(d
+ b)
- (B) 2d2b2t/(d + b)
- (C) 3d2b2t/(d + b)
- (D) 3dbt/(d2
+ b2)
8. For all practical purposes, the modulus of elasticity of steel is assumed
- (A) 200 kN/mm2
- (B) 225 kN/mm2
- (C) 250 kN/mm2
- (D) 275 kN/mm2
9. The value of fbct in the formula t = √[3W/ fbct (A2 - B2/4)] for calculating the thickness of a Rectangular base, according to IS : 800-1982, is
- (A) 1500 kg/cm2
- (B) 1650 kg/cm2
- (C) 1800 kg/cm2
- (D) 1890 kg/cm2
10. For nominal mix concrete M 20, the required quantity of water per 50 kg. of cement, is
- (A) 60 liters
- (B) 45 liters
- (C) 34 liters
- (D) 30 liters
11. The maximum characteristic strength of the stirrups reinforcement, is taken
- (A) 350 N/mm2
- (B) 375 N/mm2
- (C) 395 N/mm2
- (D) 415 N/mm2
12. For spans upto 10 m, the safe span to depth ratio for
- (A) Cantilever
is 7
- (B) Simply
supported beams is 20
- (C) Continuous
beams is 26
- (D) All the
above
13. In the formula a + bk for the calculation of the net effective section of single angles in tension connected by one leg only, the value of k, is
- (A) 1/[1 + 0.25
(b/a)]
- (B) 1/[1 + 0.35
(b/a)]
- (C) 1/[1 + 0.20
(b/a)]
- (D) 1/[1 + 0.5 (b/a)]
14. The side face reinforcement is provided if the depth of the web of a beam exceeds
- (A) 600 mm
- (B) 650 mm
- (C) 700 mm
- (D) 750 mm
15. The minimum compressive strength on 15 cm cubes of M 30 grade concrete at 7 days, should be a minimum of
- (A) 7 N/mm2
- (B) 10 N/mm2
- (C) 20 N/mm2
- (D) 30 N/mm2
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