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MCQ
26341. The time required for seasoning of timber in kiln seasoning is-
2 to 5 days
5 to 10 days
10 to 20 days
20 to 40 days
26342. Initial setting time (minimum) of ordinary port land cement is- [BPSC-22]
60 minutes
45 minutes
30 minutes
20 minutes
26343. The amount of gypsum usually added in the manufacture of cement is-
0.5 to 1%
3 to 5%
1 to 3%
0.1 to 0.5%
26344. In brick field, pugmill is used for- [BPSC-22]
preparation of clay
drying of bricks
burning of bricks
moulding of bricks
26346. The initial setting time of rapid hardening cement should not be less than--
30 min
4 hours
1 hour
10 hours
26347. The fuel generally used for burning limestone is
coalur
firewood
charcoal
any one of these
26350. যদি বালুর FM ৩.০ হয় তবে উক্ত বালুকে বলা হয়-
very fine sand
fine sand
medium sand
flaky
26351. The final setting time of ordinary cement should not be more than-
2 hours,
4 hours
4 hours
10 hours
26353. A first class brick when immersed in cold water for 24 hours should not absorb water more than- [BPSC-22]
10%
20%
15%
25%
26354. The commonly used lime in white washing is---
quick lime
fat lime
lean lime
hydraulic lime
26355. The percentage of the slag component of Portland-slag cement varies from-
10 to 40%
70 to 80%
40 to 70%
80 to 90%
26356. ইটের Herring-bone bond গাঁথুনি কোন কাজে ব্যবহৃত হয়?
Brick paving
Very thick wall
Partition walls
Footing foundation
26357. The main purpose of timber seasoning is-[BPSC-22]
to make timber cocter
to made timber fire resistant
to remove moisture at uniform rate
None of the above
26358. The compressive strength of ordinary cement is less than its tensile strength
right
wrong