MCQ
1681. What is the percentage of silica for 1st class bricks?
55%
65%
75%
50%
1682. The maximum water cement ratio durable concrete is-
0.2
0.04
0.6
0.8
1683. What is the percentage of strength gain of Ordinary Portland cement after 28days curing?
50%
60%
70%
80%
1684. Vicar's apparatus is used to determine the-
initial setting time of cement
final setting time of cement
normal setting time of cement
all of these
1685. Standard Penetration test (SPT) tube length_
6"
12"
18"
24"
1686. What do you mean by BOD?
Bacteria of damage
Before oxidation damage
Biochemical oxygen demand
Best organized demand
1687. The top diameter and height of the mould used for slump test area respecibily
100 mm, 200mm, 300 mm
200 mm, 100 mm, 300 mm
200 mm, 300 mm, 100 mm
100 mm, 300 mm, 200 mm
1688. A manometer is used to measure
low pressure
high pressure
moderate pressure
atmospheric pressure
1689. What is the hook length for steel reinforcement of diameter d?
2d
9d
6d
16d
1690. Generally the compressive strength for good bricks is-
100-110% kg/cm²
120-130% kg/cm²
140-150% kg/cm²
150-160% kg/cm²
1691. Which is the time range for initial setting time and final setting time for Ordinary Portland Cement?
30 minutes-10 hours
20 minutes-8 hours
15 minutes-6 hours
None of the above
1692. CPM stands for -
Combined process method
Critical path method
Common Planning Method
Critical process method
1693. The slump test of concrete is used to measure-
workability
impact value
nomogenetic
tensile strength
1694. What is the minimum temperature for burning of bricks?
300°-500°C
7000-1000° C
500°-700°
10000-1200°
1695. When first class brick is sunk 24 hours in water how much water will absorbed of its weight ?
1/3
1/6
1/4
1/7
1696. Asphalt cement usually used in Bangladesh has the penetration range of-
AC 40-50
AC 60-70
AC 85-100
AC 120-150
1697. 0.1 kg sand of FM 2.00 is mixed with another 500 gm sand of FM 2.60. Determine the combined FM
2.50 FM
2.20 FM
2.60 FM
2.30 FM
1698. The open wells or dug wells are also known as-
shallow wells
draw wells
percolation
all of those
1699. Chain survey is most appropriate for
small place
Palin and open place
when plain needed for a large scale
all of above
1700. A fixed point of reference of known elevation is called-
change point
station point
bench mark
datum