184 Sub-Engineer Mock Test of 50 Past Question #87 Sub-Engineer Collection of 50 Past Question from Loksewa Aayog Mock Test. 1 / 50 1. In levelling operation A. when the instrument is being shifted, the staff must not be moved B. when the staff is being carried forward, the instrument must remain stationary C. both (a) and (b) D. neither (a) nor (b) 2 / 50 2. The angle between two plane mirrors of optical square, is A. 20° B. 30° C. 45° D. 50° 3 / 50 3. The latitude of a traverse leg is obtained by multiplying its length by A. tangent of its reduced bearing B. sign of its reduced bearing C. cosine of its reduced bearing D. cosecant of its reduced bearing 4 / 50 4. The diaphragm of a stadia theodolite is fitted with two additional A. horizontal hairs B. vertical hairs C. horizontal and two vertical hairs D. none of these 5 / 50 5. The rocks in which argil (or clay) predominates, are called A. sillicious rocks B. argillaceous rocks C. calcareous rocks D. igneous rocks. 6 / 50 6. A badly mixed cement concrete results in A. segregation B. bleeding C. honey combing D. none to these 7 / 50 7. Pick up the correct statement regarding low heat cement from the following: A. It possesses less compressive strength B. Its initial setting time is about one hour C. Its final setting time is about 10 hours D. all of the above 8 / 50 8. Chemically, marble is known as A. metamorphic rock B. argillaceous rock C. calcareous rock D. silicious rock 9 / 50 9. Stress in members of statically determinate simple frames, can be determined by A. method of joints B. method of sections C. graphical solution D. all of the above 10 / 50 10. Inner part of a timber log surrounding the pith, is called A. sapwood B. cambium layer C. heart wood D. none to these 11 / 50 11. For a channel section, the shear centre lies at a distance of A. bdt/2I B. d²bt/2I C. d²b²t/4I D. dbt/3I 12 / 50 12. When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called A. shear stress B. compressive stress C. tensile stress D. transverse stress 13 / 50 13. Struts are load carrying members of a frame structure which are subjected to A. axial tension loads B. axial compressive loads C. torsional loads D. transverse loads 14 / 50 14. In pipe lines, a surge tank is provided A. to relieve the pressure due to water hammer B. to provide additional water head C. to overflow the pipe line when suddenly closed D. to remove the frictional loss in pipe 15 / 50 15. Total head of a liquid particle in motion is the sum of A. potential head and kinetic head B. kinetic head and pressure head C. potential head and pressure head D. potential head, kinetic head and pressure head 16 / 50 16. The velocity distribution of viscous fluid through a circular pipe is A. hyperbolic B. circular C. parabolic D. elliptical 17 / 50 17. The soils which contain montmorillonite minerals…… A. swell more when wet B. shrink more when dry C. possess high plasticity D. possess high coefficient of internal coefficient 18 / 50 18. Soils containing organic matters A. are of spongy nature B. swell with decrease of moisture C. shrink with increase of moisture content D. none of these 19 / 50 19. On wetting, cohesive soils, A. loose permeability B. gain shear strength C. loose elasticity D. decrease their shear strength 20 / 50 20. Under reamed piles are generally used for A. Machine foundations B. Factory building C. Tall structures D. All of the above 21 / 50 21. Which of the following cements is suitable for use in massive concrete structures such as large dams? A. Ordinary Portland cement B. Low heat cement C. Rapid hardening cement D. Sulphate resisting cement 22 / 50 22. Rocks formed due to alteration of original structure due to heat and excessive pressure are called A. Sedimentary rocks B. Igneous rocks C. Metamorphic rocks D. None of these 23 / 50 23. For nominal mix concrete M15, the required weight of fine and coarse aggregates is 350 kg and the volume of water is A. 30 liters B. 32 liters C. 34 liters D. 45 liters 24 / 50 24. The maximum characteristic strength of the stirrups reinforcement, is taken A. 350 N/mm² B. 375 N/mm² C. 395 N/mm² D. 415 N/mm² 25 / 50 25. Moist sand may contain surface water by mass upto A. 7.5% B. 5.0% C. 2.5% D. 1.25% 26 / 50 26. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a A. Cant B. Deal C. Baulk D. Strip 27 / 50 27. Proper proportioning of concrete, ensures A. desired strength and workability B. desired durability C. water tightness of the structure D. all of the above 28 / 50 28. House connections to the laterals is generally made by A. R.C.C. B. P.C.C. C. Cast iron D. Glazed stonewares 29 / 50 29. The coagulant widely used for sewage treatment, is A. alum B. ferric chloride C. ferric sulphate D. chlorinated copperas 30 / 50 30. For non-scouring velocity 5 m/sec, the type of sewers generally preferred to, is A. cast iron sewers B. cement concrete sewers C. glazed bricks sewers D. stone ware sewers 31 / 50 31. A fall in a canal bed is generally provided, if A. ground slope exceeds the designed bed slope B. designed bed slope exceeds the ground slope C. ground slope is practically the same as the designed bed slope D. none of these 32 / 50 32. The best instrument for measuring the velocity of a stream flow is A. Pitot tube B. Price's current meter C. Surface float D. Sub-surface float 33 / 50 33. The pitch of the main bars in a simply supported slab, should not exceed its effective depth by A. Three times B. Four times C. Five times D. Six times 34 / 50 34. In long and short wall method of estimation, the length of long wall is the centre to centre distance between the walls and A. Breadth of the wall B. Half breadth of wall on each side C. One fourth breadth of wall on each side D. None of these 35 / 50 35. The maximum limit of water absorption for aggregate suitable for road construction is A. 0.4 % B. 0.6 % C. 0.8 % D. 1.0 % 36 / 50 36. The most economical lighting layout which is suitable for narrow roads is A. Single side lighting B. Staggered system C. Central lighting system D. None of the above 37 / 50 37. If aggregate impact value is 20 to 30 percent, then it is classified as A. Exceptionally strong B. Strong C. Satisfactory for road surfacing D. Unsuitable for road surfacing 38 / 50 38. At intersection of roads, the traffic volume study is carried out to ascertain the number of vehicles A. Moving along straights B. Turning left C. Turning right D. all of the above 39 / 50 39. Percentage of free carbon in bitumen is A. More than that in tar B. Less than that in tar C. Equal to that in tar D. None of the above 40 / 50 40. Maximum daily traffic capacity of bituminous pavements is A. 500 tonnes per day B. 1000 tonnes per day C. 1500 tonnes per day D. 2000 tonnes per day 41 / 50 41. In the time-cost optimisation, using CPM method for network analysis, the crashing of the activities along the critical path is done starting with the activity having A. Longest duration B. Highest cost slope C. Least cost slope D. Shortest duration 42 / 50 42. In stone masonry, if stones are so placed that their layers are parallel to the direction of load, they A. Split easily B. Are affected by moisture C. Both (A) and (B) D. None of these 43 / 50 43. Wrought iron is used for A. Structural works in beams B. Small sized water pipes C. Columns and struts D. None of these 44 / 50 44. If water required for 1 bag of cement is 30 litres, the water cement ratio is: A. 0.40 B. 0.50 C. 0.60 D. None of these 45 / 50 45. For given water content, workability decreases if the concrete aggregates contain an excess of A. Thin particles B. Flat particles C. Elongated particles D. All of the above 46 / 50 46. Which of the following is the unit of kinematic viscosity? A. Pascal B. Poise C. Stoke D. Faraday 47 / 50 47. The highest efficiency is obtained with a channel of __________ section. A. Circular B. Square C. Rectangular D. Trapezoidal 48 / 50 48. If the shearing stress is zero on two planes, then the angle between the two planes is A. 45° B. 90° C. 135° D. 225° 49 / 50 49. For proper field control, which of the following methods is best suited for quick determination of water content of a soil mass? A. Oven drying method B. Sand bath method C. Alcohol method D. Calcium carbide method 50 / 50 50. The shearing strength of a cohesion-less soil depends upon A. Dry density B. Rate of loading C. Confining pressure D. 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