MCQ
321. The modules of elasticity for 400 (60 grade) is approximately equal to-
214 kn/mm²
274 kn/mm²
314 kn/mm²
414 kn/mm²
322. The maximum water cement ratio for durable concrete is-
0.2
0.4
0.6
0.8
323. For reinforced cement concrete lintels and slabs the nominal size of coarse aggregate should not exceed-
10 mm
15 mm
20 mm
40 mm
324. At the neutral axis of a beam the shear stress is-
zero
minimum
maximum
infinity
325. When a load on the free end of a cantilever beam is increased, failure will occur-
at the free end
at the fixed end
at the middle of the beam
distance 2L/3 from end
326. According to standard specifications the full strength of concrete is achieved after days-
7
14
21
28
327. A long column is one whose ratio of effective length to its least internal dimension exceeds-
5
10
12
20
328. The unit bearing capacity of footing in sand-
decreases with depth of footing
decreases with width of footing
increases with depth of footing
increases with width of footing
329. The number of bags of cement required per cubic meter of 1:1.5:3 approximately. concrete will be
3 to 4
4 to 5
5 to 6
6 to 8
330. The slenderness ratio is the ratio of. প্লেন্ডারনেস রেশিও হলো)
area of column to least radius of gyration (কলামের আকার ও নূন্যতম রেডিয়াস অব জাইরেশন এর অনুপাত)
length of column to least radius of gyration (কলামের দৈঘ্য ও নূন্যতম রেডিয়াস অব জাইরেশন এর অনুপাত)
least radius of gyration to area of column (নূন্যতম রেডিয়াস অব জাইরেশন ও কলামের আকারের অনুপাত)
least radius of gyration to length of column (নূন্যতম রেডিয়াস অব জাইরেশন ও কলামের দৈর্ঘ্যের অনুপাত)
331. Moment of inertia of a circular section about its diameter (d) is (d ব্যাস বিশিষ্ট বৃত্তাকার ক্ষেত্রের মোমেন্ট অব ইনার্শিয়া)
π d³ /126
πd³/32
πd/32
πd²/64
332. The vertical depth for a channel is given by (q=unit discharge through the channel)
(q/g)1/2
(q²/g
(q³/g) 1/4
none of these
333. The frictional resistance of a pope varies approximately with- of the liquid.
pressure
velocity
square of velocity
cube of velocity
334. The bending moment on a section is maximum where shear force is-
minimum
maximum
changing
zero
336. The hydraulic mean depth or the hydraulic radius is the ratio of-
area of flow and wetted perimeter
wetted perimeter and the diameter of the pope
velocity of flow and area of flow
none of these
337. The shear force of a simply supported beam of length 'l' carrying a uniformly distributed load OD w per unit length is-
0
w1/4
w1/2
w¹ 1
338. The continuous strain, which the concrete undergoes due to application of external loads, is called-
workability
bleeding
segregation
creep
339. A cantilever retaining wall should not be used for heights more than
4m
6m
8m
10m
340. The under weight of hard rock is-
2400 kg/m³
2500 kg/m³
2600 kg/m³
2700 kg/m³