MCQ
26361. ASTM No. 16 সিভের ওপেনিং সাইজ কত মিমি? [BWDB-20]
১.১৮ মিমি
১.৪০ মিমি
২.৩৬ মিমি
১.৭০ মিমি
কোনোটিই নয়
26362. The percentage of water for making a cement paste of normal consistency varies from-
15 to 25%
25 to 35%
35 to 50%
50 to 60%
26363. উন্নত মানের বালু কখনোই ----থেকে আহরিত হয় না। [PPA-20]
নদী
নালা
সাগর
চর
26364. The degree of grinding of cement is called-
fineness
impact value
soundness
bulking
26365. The inert mineral material used for 01-themanufacture of mortars and concrete is-
cement
aggregate
water
admixture
26366. The average out-turn of first class bricks in kiln burning is-
50 to 60%
60 to 70%
70 to 80%
80 to 90%
26367. For reinforced concrete, the aggregate used is-
sand
grave
crushed rock
all of these
26368. দুটি বালির নমুনার ওজন ও FM যথাক্রমে 500 গ্রাম ও 750 গ্রাম এবং 2.5 ও 2.2 হলে তাদের Combined FM কত হবে? [BPSC-20]
2.4
2.38
2.42
2.32
26369. The compressive strength of perforated bricks should not be less than-
4 MN/m²
5 MN/m²
6 MN/m²
7 MN/m²
26370. The natural drying of bricks is also called back drying.
true
false
26371. The percentage of alumina in a good brick clay should vary from-
20 to 30%
30 to 40%
40 to 50%
50 to 60%
26372. For the construction of retaining walls, a------stone must be used.
soft
hard
heavy
light
26373. The burning of bricks in kilns is completed within-----hours.
12
24
48
96
26374. The average out-turn of first class bricks in clamp burning is about-
50%
60%
70%
80%
26375. The frog of a brick is normally made on its-
longer face
bottom face
shorter face
top face
26376. The size of mould for bricks should be---- the specified size of the bricks.
equal to
double
smaller than
larger than
26377. The compressive strength of paving bricks should not be less than-
20 MN/m²
30 MN/m²
40 MN/m²
50 MN/m²
26378. Initial setting time of ordinary Portland cement is-
15min
30min
60min
10hour
26379. For one cubic metre of brick masonry, the number of bricks required is-
400
450
500
550
26380. Lime occurs in a free state in nature.
True
False