451 . An R.C.C. lintel is spanning an opening of 2m span in a brick wall. The height of the roof is 2.9m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
- A. Triangular load of the wall
- B. UDL of wall
- C. UDL of wall + load from the roof
- D. Triangular load + load from the roof
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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প্রিমিয়াম প্ল্যান: ১ মাস
99 ৳
৩০ দিনের জন্য সকল লাইভ এবং আর্কাইভ মডেল টেস্ট, প্রশ্ন ব্যাংক ও লেকচার শিট সহ অ্যাপ এর প্রিমিয়াম সব এক্সেস পাবেন।
452 . An R.C.C. lintel is spanning an opening of 2m span in a brick wall. The height of the roof is 2.9m above the floor level and that of the opening is 2.1 m above the floor level. The lintel is to be designed for self weight plus
- A. Triangular load of the wall
- B. UDL of wall
- C. UDL of wall + load from the roof
- D. Triangular load + load from the roof
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453 . Which of the following causes irreversibility?
- A. electrical resistance, magnetic hysteresis
- B. inelasticity
- C. friction, viscosity
- D. all
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বাংলাদেশ পল্লী বিদ্যুতায়ন বোর্ড || সহকারী প্রকৌশলী (Civil/EEE/Mechanical) (23-02-2024) || 2024
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454 . Steel bars are generally connected together to get greater length than the standard length by providing
- A. Straight bar splice
- B. Hooked splice
- C. Dowel splice
- D. All the above
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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455 . The blade friction in the impulse turbine reduces the velocity of steam by _____ while it passes over the blades.
- A. 10-15%
- B. 15-20%
- C. 20-30%
- D. 30-40%
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বাংলাদেশ পল্লী বিদ্যুতায়ন বোর্ড || সহকারী প্রকৌশলী (Civil/EEE/Mechanical) (23-02-2024) || 2024
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456 . A pre-stressed concrete member is preferred because
- A. Its dimensions are not decided from the diagonal tensile stress
- B. Large size of long beams carrying large shear force need not be adopted
- C. Removal of cracks in the members due to shrinkage
- D. All the above
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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457 . Columns may be made of plain concrete if their unsupported lengths do not exceed their least lateral dimension
- A. Two times
- B. Three times
- C. Four times
- D. Five times
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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458 . Minimum spacing between horizontal parallel reinforcement of the same size should not be less than
- A. One diameter
- B. 2.5 diameters
- C. 3 diameters
- D. 3.5 diameters
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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459 . Pick up the correct statement from the following:
- A. Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling
- B. Lateral reinforcement prevents the shearing of concrete on diagonal plane
- C. Lateral reinforcement stops breaking away of concrete cover, due to buckling
- D. All the above
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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460 . The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is
- A. 35
- B. 2562
- C. 3063
- D. 2064
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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461 . The normal consistency of Portland cement is about
- A. 10%
- B. 15%
- C. 20%
- D. 25%
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বাংলাদেশ পল্লী বিদ্যুতায়ন বোর্ড || সহকারী প্রকৌশলী (Civil/EEE/Mechanical) (23-02-2024) || 2024
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462 . The load stress of a section can be reduced by
- A. Decreasing the lever arm
- B. Increasing the total perimeter of bars
- C. Replacing larger bars by greater number of small bars
- D. Replacing smaller bars by greater number of greater bars
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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463 . Hydraulic mean radius is
- A. Mean radius of sewer
- B. Difference in heads between two points in circular pipes
- C. Mean of radii in a pipe line of varying cross-sections
- D. Cross-sectional area/wetted perimeter
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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464 . Which of the following pumps is used to pump sewage solids with liquid sewage without clogging the pump is?
- A. Centrifugal pump
- B. Pneumatic ejector
- C. Reciprocating pump
- D. None of these
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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465 . The pressure exerted by
- A. The sewage when running full from inside, is called internal pressure
- B. The internal pressure if any, causes tensile stress in the pipe material
- C. Pressure sewers are designed to be safe in tension
- D. All the above
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Dhaka WASA Supply & Sewerage Authority (DWASA) || Assistant Engineer (02-03-2024) || 2024
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