MCQ
601. Slack Time refers to অথবা Slack time কী ?
An activity
An event
Both event and activity
None of the above
602. For increasing setting time of concreate, what type of admixture is used?
accelerator
retarder
water reducing
air entraining
603. When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is
0.0005 cm/sec
0.001 cm/sec
0.002 cm/sec
0.01 cm/sec
604. ভরাট মাটির ধ্বংস প্রতিরোধে নিচের কোন স্ট্রাকচার ব্যবহৃত হয়?
Retaining wall
Boundary wall
shear wall
Vertical wall
605. An ideal rise in a stair is (একটি সিঁড়িতে আদর্শ রংব হল-)
100 mm
125 mm
150 mm
250 mm
606. Pick up the correct statement from the following:
The unit hydrograph of a specified unit duration obtained from the past data can be used to obtain the hydrograph of future storms of like duration
To obtain the ordinates of storm hydrograph, the ordinates of unit hydrograph are multiplied by the multiplying factor
The multiplying factor for storm hydrograph may be obtained by dividing the run off in mm by 25 mm
All the above
607. Vertical drop fall is satisfactory for a height upto
0.5 m
1.5 m
3.5 m
5.0 m
608. A first class brick when immersed in cold water 24 hours should not absorb water more than (প্রথমে শ্রেণির ইট ২৪ ঘণ্টা পানিতে ভেজানোর পর..... এর অধিক পানি শোষন করিবে না)
10%
20%
15%
25%
609. কোন materials টি membrane curing এ ব্যবহার করা হয় না?
Bituminous emulsion
Lime emulsion
Wax emulsion
Plastic emulsion
610. Workability of concrete is measured by (.. যারা কংক্রিটের কার্যক্ষমতা পরিমাণ করা হয়।)
cylinder
cube test
Slump test
setting time test
611. A unit hydro graph has one unit of
Rainfall duration
Rainfall excess
Time base of direct runoff
Discharge
612. The net head under which the turbine reaches its peak efficiency at synchronous speed is called
Design head
Rated head
Gross head
Operating head
613. অনিরাপদ কাঠামোকে temporary support প্রদানের ব্যবস্থাকে কি বলে?
underpinning
scaffolding
shoring
jacking
614. For efficient working of a control meter, its throat length is approximately kept
Equal to the critical depth
Twice the critical depth
Three times the critical depth
Four times the critical depth
615. Efflorescence in cement plaster is due to excess of. (কিসের আধিক্যের কারণে সিমেন্ট প্লাস্টারে Efflorescence হয়?)
Alumine
Silica
Lime
Alkali
616. Pick up the correct statement from the following:
If ground water enters the channel, the channel is known as effluent channel
If water goes out of channel to meet ground water, the channel is said to be influent stream
If the water table is at higher level than the water level in channel, ground water flows to the stream
All the above
617. Precipitation caused due to striking of air masses with a topographical feature, is called
Orographic precipitation
Convective precipitation
Cyclonic precipitation
None of these
618. Initial setting time (minimum) of ordinary Portland cement is- (সিমেন্টের প্রাথমিক জমাটবদ্ধতার ন্যূনতম সময় কত-)
60 minutes
45 minutes
30 minutes
20 minutes
619. If ID is the depth of scour below original bed, then the width of launching apron is generally taken as
1.2 D
1.5 D
2.0 D
2.5 D
620. Tiles এ glazing কেন করা হয়?
To increase hardness
To increase imperviousness
To increase porousness
কোনটিই নয়