Advanced Construction Technology Multiple Choice Questions
1. Which type of lateral forces is applies on building?
A. Wind load
B. Water load
C. Earthquake force
D. All of the above
Answer: D.All of the above
2. Design process of building for lateral forces are given in the __________
A. IS : 875 – 1987
B. IS : 873 – 1987
C. IS : 876 – 1987
D. IS : 874 – 1988
Answer: A.IS : 875 – 1987
3. Accelerators are used in concrete for_________
A. Earlier removal of the form work.
B. Reduction of required period of curing.
C. Earlier replacement of structure in service
D. All of the above
Answer: D.All of the above
4. which factor affect the selection of excavation equipment?
A. Size of equipment
B. Type of equipment
C. Cost/benefit ratio
D. All of the above .
Answer: D.All of the above .
5. How much silicon dioxide present in the silica fume?
A. 70 %
B. 45 %
C. 90 %
D. 75 %
Answer: C.90 %
6. Red mud is byproduct of ______________.
A. Aluminium plant
B. Iron plant
C. Thermal power plant
D. Nuclear power plant
Answer: A.Aluminium plant
7. Phospho gypsum is by product of__________________.
A. Aluminium plant
B. Fertilizer plant
C. Iron plant
D. Thermal power plant
Answer: B.Fertilizer plant
8. “Plasticizers are used for increase the setting time of concrete.” Is it true or false?
A. True
B. False
C. none
D. all
Answer: B.False
9. output of power shovel does not depend on_______
A. Class of material
B. Cost of shovel
C. Job condition
D. Height of cut
Answer: B.Cost of shovel
10. Dragline excavate the material by_______
A. Dragging
B. Puling
C. Pushing
D. Lifting
Answer: A.Dragging
11. What is cutting speed of the wheel type trenching machine?
A. 2.5 to 3 m/hr
B. 6 to 9 m/hr
C. 10 to 12 m/hr
D. 2 to 3 m/hr
Answer: A.2.5 to 3 m/hr
12. Belt conveyors are suitable for transferring material at _________
A. Short distance and low speed
B. Short distance and high speed
C. Long distance and low speed
D. Long distance and high speed
Answer: D.Long distance and high speed
13. “Chutes are used for transferring the concrete from low level to high level.” Is it true or false ?
A. True
B. False
C. none
D. all
Answer: B.False
14. Strength of rubber belt for belt conveyors depends on_______
A. Number of plies
B. Type of rubber
C. Type of reinforcement
D. Size of belt
Answer: A.Number of plies
15. Which factors affect the selection and design of the belt conveyor?
A. Width of belt
B. Required strength
C. Required thickness
D. All of the above
Answer: D.All of the above
16. Reciprocating pump used for_________
A. Low discharge & low head
B. High discharge & low head
C. Low discharge & high head
D. High discharge & high head
Answer: D.High discharge & high head
17. What is gross mass of the pneumatic type rollers?
A. 5 – 200 tones
B. 10- 100 tones
C. 500 – 700 tones
D. 150 – 450 tones
Answer: A.5 – 200 tones
18. Which of part of internal vibrator generates a vibration?
A. Power unit
B. Flexible tube
C. Vibrating head
D. None of the above
Answer: C.Vibrating head
19. Rippers are used for _______
A. Remove the ground roots
B. Fracturing in the hard rock surface
C. As supporting unit for scrapers
D. All of the above
Answer: D.All of the above
20. What is a height of the steel derric pool?
A. 30 – 50m
B. 30 – 40m
C. 10 – 20m
D. 10 – 50m
Answer: B.30 – 40m
21. Locomotive crane can carry a load up to _____
A. 40 tones
B. 60 tones
C. 50 tones
D. 20 tones
Answer: C.50 tones
22. Selection of drilling equipments depends on a _______
A. Availability of water for drilling
B. depth of holes required
C. hardness of rock
D. All of the above
Answer: D.All of the above
23. Which factors affect the selection of the drilling pattern?
A. Types of rock
B. Depth of hole
C. Size of hole
D. All of the above
Answer: D.All of the above
24. Jaw crusher acts as________
A. Primary crusher
B. Secondary crusher
C. Tertiary crusher
D. None of the above
Answer: B.Secondary crusher
25. Selection of crusher is depends on a________
A. Type of rock
B. Size of the rock pieces
C. Required capacity of the plant
D. All of the above
Answer: D.All of the above
26. How many blows per minute can be applies by the double acting hammer?
A. 90 to 240
B. 90 to 250
C. 50 to 200
D. 60 to 360
Answer: A.90 to 240
27. Shotcrete is used for _________
A. Swimming pools and pre stressed tanks
B. Canal and tunnel lining
C. Repair of damaged concrete
D. All of the above
Answer: D.All of the above
28. Intensity of earthquake vibration depends on………………
A. Depth of focus
B. type of strata
C. distance from epicenter
D. all of the above
Answer: D.all of the above
29. Specification of admixture given in the …………………
A. IS : 9103 ‒ 1999
B. IS : 9104 ‒ 1999
C. IS : 9103 ‒ 1994
D. IS : 9103 ‒ 1991
Answer: A.IS : 9103 ‒ 1999
30. Admixtures which cause early setting and hardening of concrete are called………
A. accelerating admixture
B. retarding admixture
C. plasticizers
D. none of the above
Answer: A.accelerating admixture
31. Admixtures which reduce setting and hardening of concrete are called………
A. accelerating admixture
B. retarding admixture
C. plasticizers
D. none of the above
Answer: B.retarding admixture
32. How much calcium chloride is used in the concrete as admixture?
A. 2%
B. 4%
C. 3%
D. 8%
Answer: A.2%
33. Which one is use as retarders?
A. gypsum
B. sugars
C. cellulose products
D. all of the above
Answer: D.all of the above
34. Normally………….. gypsum is used in concrete.
A. 2% to 4%
B. 2% to 8%
C. 2% to 9%
D. 3% to 4%
Answer: A.2% to 4%
35. Super plasticizers reduce a water requirement in concrete up to………..
A. 40%
B. 70%
C. 30%
D. 20%
Answer: C.30%
36. Which one of these is used as air entraining agent in concrete?
A. natural wood resins
B. animal fats
C. vegetable fats
D. all of the above
Answer: D.all of the above
37. By adding air inside a concrete ……………
A. improve workability
B. reeducation in strength
C. reduce permeability
D. all of the above
Answer: D.all of the above
38. Which admixture is used for bonding between old and new surface of concrete?
A. accelerating admixture
B. retarding admixture
C. plasticizers
D. bonding admixture
Answer: D.bonding admixture
39. Higher dose of the super plasticizers causes…………
A. effect on shrinkage properties
B. effect on creep properties
C. a & b both
D. creates a cracks
Answer: C.a & b both
40. Optimum air content in concrete is………..
A. 3% to 6%
B. 4% to 6%
C. 3% to 7%
D. 3% to 4%
Answer: A.3% to 6%
41. Flyash is a byproduct of
A. aluminum plant
B. power plant
C. silica furnace
D. fertilizer plant
Answer: B.power plant
42. What is efficiency factor of silica fume in high water cement ratio concrete?
A. 3 to 4
B. 3 to 9
C. 3 to 10
D. 2 to 7
Answer: A.3 to 4
43. What is density of the undensified silica fume? (in kg/m3)
A. 200 to 340
B. 200 to 800
C. 200 to 300
D. 100 to 170
Answer: C.200 to 300
44. Blast furnace slag is by product of……….
A. pig iron plant
B. power plant
C. silica furnace
D. fertilizer plant
Answer: A.pig iron plant
45. Blast furnace slag contain……….
A. lime
B. silica
C. alumina
D. all of the above
Answer: D.all of the above
46. Portland slag cement is used for………..
A. mass concrete work
B. marine works
C. hot weather concreting
D. all of the above
Answer: D.all of the above
47. Surkhi is used for……
A. mass concrete work
B. marine works
C. hot weather concreting
D. water proofing
Answer: D.water proofing
48. Surkhi is byproduct of……….
A. nuclear power plant
B. thermal power plant
C. aluminum plant
D. brick factories
Answer: D.brick factories
49. Plastic wastes are used for the construction of…………
A. beams and columns
B. floor slab
C. bituminous road
D. none of the above
Answer: C.bituminous road
50. How much red mud is mixed with PVC for making red mud plastic?
A. 25%
B. 15%
C. 75%
D. 95%
Answer: A.25%
51. Red mud used for manufacturing of………
A. ceiling tiles
B. aggregate
C. cellular concrete
D. all of the above
Answer: D.all of the above
52. Phospho gypsum used for……..
A. ceiling tiles
B. aggregate
C. cellular concrete
D. wall partition panels
Answer: D.wall partition panels
53. Which factors affect the selection of the construction equipment?
A. size of equipment
B. use of equipment
C. country of origin
D. all of the above
Answer: D.all of the above
54. Which is excavation equipment?
A. power shovel
B. dragline
C. scoop
D. all of the above
Answer: D.all of the above
55. Which factors affect the selection of excavation equipment?
A. type
B. cost/benefit ratio
C. availability of parts
D. all of the above
Answer: D.all of the above
56. What is normal size of power shovel? (in cu.m)
A. 0.5 to 4.0
B. 0.5 to 7.0
C. 0.9 to 5.0
D. 0.5 to 5.0
Answer: D.0.5 to 5.0
57. Output of power shovel does not depends on………..
A. depth of cut
B. angle of swing
C. condition
D. cost of shovel
Answer: D.cost of shovel
58. If the depth of the cut of power shovel is too small than it cause……..
A. bucket does not fill completely
B. generates excessive stress on the components
C. reduce the shovel output
D. all of the above
Answer: D.all of the above
59. Crawler mounted power shovel has……
A. low speed
B. medium speed
C. high speed
D. does not move for its position
Answer: A.low speed
60. Crawler mounted power shovel used in…..
A. hard ground
B. soft ground
C. RCC road
D. underwater
Answer: B.soft ground
61. What is typical cycle time of power shovel? ( in sec.)
A. 17 to 28
B. 14 to 29
C. 17 to 24
D. 17 to 30
Answer: C.17 to 24
62. Which one of these is not a part of the dragline?
A. Bucket
B. Boom
C. Clam shall
D. none of the above
Answer: C.Clam shall
63. Which component of the clam shell responsible for opening and closing of the clam shell?
A. Tag line
B. Hoisting line
C. closing line
D. sheaves
Answer: A.Tag line
64. Capacity of clam shell is given in………….
A. cubic yards
B. cubic meter
C. cubic foot
D. liter
Answer: A.cubic yards
65. Which factors affects the operation of clam shell?
A. height of lift
B. angle of swing
C. operators experience
D. all of the above
Answer: D.all of the above
66. Clem shell does not work for…………
A. under water excavation
B. excavation of trenches
C. for excavating large pit
D. all of the above
Answer: C.for excavating large pit
67. Wheel type trenching machine can excavate the trench of width up to …………
A. 150 cm
B. 140 cm
C. 120 cm
D. 70 cm
Answer: A.150 cm
68. What is maximum cutting depth of the wheel type trenching machine?
A. 3 m
B. 4.7 m
C. 2 m
D. 1.7 m
Answer: A.3 m
69. Ladder type trenching machine can excavate the trench of width up to …………
A. 350 cm
B. 840 cm
C. 220 cm
D. 360 cm
Answer: D.360 cm
70. What is maximum cutting depth of the ladder type trenching machine?
A. 3 m
B. 4.7 m
C. 10 m
D. 1.7 m
Answer: C.10 m
71. Which factors affect the selection of trenching machine?
A. type of soil
B. depth of cutting
C. width of trenches
D. all of the above
Answer: D.all of the above
72. Which is not a part of the hoe?
A. hoist cable
B. boom
C. cutting wheel
D. dipper
Answer: C.cutting wheel
73. Back hoe or hoe is not used for the excavation of………….
A. trenches
B. basement
C. tunnel
D. shallow pit
Answer: C.tunnel
74. Which one is not true for wheel tractors?
A. high speed
B. used in firm ground
C. low weight carrying capacity
D. used in water logged area
Answer: D.used in water logged area
75. Which one is true for crawler tractors?
A. high speed
B. used in firm ground
C. low weight carrying capacity
D. used in water logged area
Answer: D.used in water logged area
76. Which factor does not affect the selection of the tractor?
A. natural of haul road
B. operator skill
C. slop of haul road
D. none of the above
Answer: B.operator skill
77. Pulling capacity of the wheel tractor is measured in……….
A. Hp
B. Kg
C. N
D. Nm
Answer: B.Kg
78. Which one is not a part of the tractor?
A. engine
B. gearbox
C. ground drive
D. trailer
Answer: D.trailer
79. Gradability is defined as……..
A. maximum slop up to which tractor can move at uniform speed
B. maximum load carrying capacity
C. maximum engine power
D. maximum pulling force
Answer: A.maximum slop up to which tractor can move at uniform speed
80. Bull dozers are used for………
A. cutting of earth
B. pushing of earth
C. a & B both
D. none of the above
Answer: C.a & B both
81. Bulldozers are control by……..
A. hydraulic force
B. pneumatic force
C. electric drive
D. electromagnetic drive
Answer: A.hydraulic force
82. Output of earth moving machines depends on…….
A. efficiency of the operator
B. nature of soil
C. weather
D. all of the above
Answer: D.all of the above
83. Tilting of blade of bulldozer is used for….
A. cutting a limited portion of the length of soil
B. changing the cutting angle
C. for transferring a soil in one side of the bulldozers
D. for collecting soil a one point
Answer: A.cutting a limited portion of the length of soil
84. Bulldozers can angle its blade up to……….
A. 30º
B. 20º
C. 25º
D. 17º
Answer: C.25º
85. What is primary work of graders?
A. leveling & finishing
B. trenching
C. back filling
D. excavating
Answer: A.leveling & finishing
86. Blade of grader can rotate up to………
A. 300º
B. 360º
C. 250º
D. 170º
Answer: B.360º
87. Scarifier used for…..
A. loosen hard soil
B. leveling of soil
C. trenching work
D. back filling of trenches
Answer: A.loosen hard soil
88. Maximum capacity of scrapers is……….. ( in cu.m)
A. 3
B. 4
C. 8
D. 9
Answer: D.9
89. Main use of scraper is…………
A. loosen hard soil
B. leveling of soil
C. trenching work
D. back filling of trenches
Answer: B.leveling of soil
90. Which one is not a operational part of the scraper…….
A. bowel
B. apron
C. ejector
D. tow cable
Answer: D.tow cable
91. Pusher loader scrapers used for………….
A. low load
B. medium load
C. high load
D. any type of load
Answer: A.low load
92. Push pull scarpers works in the team of ……. Scrapers.
A. 2
B. 4
C. 3
D. 10
Answer: A.2
93. Which one of these is not a part of operation cycle of scraper?
A. loading
B. dumping
C. turning
D. back filling
Answer: D.back filling
94. Which factor does not affect the output of the scraper?
A. size of tractor
B. cost of unit
C. haul distance
D. size of borrow pit
Answer: B.cost of unit
95. What is maximum capacity of the scraper? (in cu.m)
A. 7
B. 18
C. 25
D. 30
Answer: C.25
96. Which of these is not a favorable condition for working of rippers?
A. faults and fracture in hard surface
B. brittle structure of rock
C. moisture in rock surface
D. large grain size soil
Answer: C.moisture in rock surface
97. What is maximum services life of ripper tips? ( in hours)
A. 100
B. 200
C. 1000
D. 4000
Answer: C.1000
98. Which factor does not affect the output of the rippers?
A. type of soil
B. cost of rippers
C. length of pass
D. size of ripper tooth
Answer: B.cost of rippers
99. In general the capacity of the on highway truck is………… (in cu.m)
A. 3 to 25
B. 4 to 25
C. 3 to 35
D. 10 to 25
Answer: A.3 to 25
100. Rear dump trucks are used for………….
A. dumping in small hopers
B. dumping in small space
C. back filling of trenches
D. all of the above
Answer: D.all of the above
101. Bottom dump trucks are used for………….
A. spread the material in wide area
B. in food processing unit
C. where material stored under ground
D. all of the above
Answer: D.all of the above
102. Which one of these is a part of cable ways?
A. track cable
B. carriage
C. fall rope
D. all of the above
Answer: D.all of the above
103. Which one of these is not part of operation of crane?
A. digging
B. hoisting
C. luffing
D. slewing
Answer: A.digging
104. What is standard capacity of power driven scotch derric crane? (in tones)
A. 3 to 50
B. 10 to 50
C. 20 to 50
D. 3 to 80
Answer: A.3 to 50
105. What is standard capacity of hand operated scotch derric crane? (in tones)
A. 3
B. 5
C. 20
D. 80
Answer: B.5
106. Gantry cranes are used in……….
A. steel plant
B. automobile manufacturing plant
C. ports
D. all of the above
Answer: D.all of the above
107. What is maximum capacity of hand winches? (in tones)
A. 3
B. 5
C. 20
D. 80
Answer: B.5
108. How many numbers of idlers are requires per Km length of belt conveyor?
A. 1000 to 1200
B. 1000 to 1800
C. 1200 to 1900
D. 2000 to 3200
Answer: A.1000 to 1200
109. At which angle side rollers are tilted in belt conveyors?
A. 30º
B. 20º
C. 25º
D. 17º
Answer: B.20º
110. Air vessel used for……….
A. maintain a uniform flow
B. increase the speed of pump
C. increase the pump efficiency
D. all of the above
Answer: D.all of the above
111. Which one of these is not a type of impeller?
A. close impeller
B. semi open impeller
C. open impeller
D. semi close impeller
Answer: D.semi close impeller
112. What is function of foot valve in pump?
A. to prevent the back flow of the water
B. to close the impeller
C. provide the opening to the casing
D. all of the above
Answer: A.to prevent the back flow of the water
113. Which factors affect the selection of pump?
A. required discharge
B. cost
C. life of pump
D. all of the above
Answer: D.all of the above
114. What is block weight of hand rammer? ( in kg)
A. 3 to 4
B. 3 to 5
C. 3 to 10
D. 5 to 15
Answer: B.3 to 5
115. Which factor does not affect the compaction of soil by rolling?
A. contact pressure
B. number of passes
C. speed of roller
D. operator’s skill
Answer: D.operator’s skill
116. What is maximum weight of the sheep foot rollers? ( in tones)
A. 10
B. 15
C. 20
D. 50
Answer: A.10
117. What is normal vibration time in the case of internal vibrator? (in sec.)
A. 10 to 20
B. 10 to 30
C. 5 to 20
D. 10 to 40
Answer: C.5 to 20
118. What is the vibration frequency of the surface vibrator? (in cycles per min.)
A. 1000 to 6000
B. 3000 to 6000
C. 2000 to 6000
D. 2500 to 6500
Answer: B.3000 to 6000
119. Which factors affect the selection of the drilling equipment?
A. depth of hole
B. hardness of rock
C. nature of terrain
D. all of the above
Answer: D.all of the above
120. Which factor does not affect the drilling rate?
A. depth of hole
B. cost of equipment
C. hardness of rock
D. pressure of air
Answer: B.cost of equipment
121. Abrasion drill work on the principle of……….
A. frication
B. grinding
C. electromagnetic force
D. thermal conductivity
Answer: B.grinding
122. Shot drill used a………….. for drilling.
A. steel shots
B. copper shots
C. carbide drilling bit
D. any one of the above
Answer: A.steel shots
123. What is maximum cutting depth of shot drill?
A. 180m
B. 200m
C. 350m
D. 150m
Answer: A.180m
124. Diamond drill used for………..
A. large hole drilling
B. exploring drilling
C. oil drilling
D. construction drilling
Answer: B.exploring drilling
125. Drifters can cut the hole up to depth of…….. (in cm)
A. 100
B. 120
C. 150
D. 200
Answer: B.120
126. Which factor does not affect the selection of drilling pattern?
A. types of rock
B. size of drilling
C. available water
D. strength of rock
Answer: C.available water
127. Cone crusher act as……..
A. primary crusher
B. secondary crusher
C. tertiary crusher
D. any of the above
Answer: B.secondary crusher
128. Which factors affect the selection of crusher?
A. type of rock
B. size of rock
C. cost
D. all of the above
Answer: D.all of the above
129. Bucket ladder dredger is suitable for……..
A. soft soil
B. sand
C. hard clay
D. all of the above
Answer: D.all of the above
130. What is maximum digging depth of the dipper dredger? (in m)
A. 20
B. 35
C. 80
D. 100
Answer: A.20
131. What is maximum dumping rang of the dipper dredger? (in m)
A. 20
B. 35
C. 80
D. 100
Answer: B.35
132. What is maximum digging depth of the dipper dredger? (in m)
A. 20
B. 35
C. 25
D. 100
Answer: C.25
133. What is maximum digging depth of the hydraulic dredger? (in m)
A. 20
B. 35
C. 25
D. 15
Answer: D.15
134. Shotcrete is used for……
A. thin walls
B. swimming pools
C. repair of concrete
D. all of the above
Answer: D.all of the above
135. What is rebound (in %) for horizontal walls?
A. 5 to 15
B. 10 to 25
C. 20 to 50
D. 25 to 35
Answer: A.5 to 15
136. Which material can reduce a rebound of the concrete?
A. carbon
B. pozzolanic
C. iron
D. wood cheeps
Answer: B.pozzolanic
137. What is rebound (in %) for vertical walls?
A. 5 to 15
B. 10 to 25
C. 15 to 30
D. 25 to 35
Answer: C.15 to 30
138. What is rebound (in %) for overhead walls?
A. 5 to 15
B. 10 to 25
C. 15 to 30
D. 20 to 50
Answer: D.20 to 50
139. The failure of foundation of a building is due to
A. withdrawal of subsoil moisture
B. unequal settlement of soil
C. lateral escape of the supporting material
D. all of these
Answer: D.all of these
140. The ability of sub-soil to support the load of the structure without yielding is known as
A. bearing value of soil
B. bearing power of soil
C. bearing capacity of soil
D. any one of these
Answer: D.any one of these
141. The bearing capacity of soils can be improved by
A. increasing the depth of footing
B. draining the sub-soil water
C. ramming the granular material like crushed stone in the soil
D. all of the above
Answer: D.all of the above
142. Dewatering is required for……
A. safety of excavation
B. safety of foundation of adjoining structure
C. safety of people and traffic passing near the excavation
D. all of the above
Answer: D.all of the above
143. Pile foundation is generally used when the soil is………
A. compressible
B. water-logged
C. made-up type
D. all of these
Answer: D.all of these
144. The type of foundation most suitable for bridges is
A. pier foundation
B. raft foundation
C. pile foundation
D. strap foundation
Answer: C.pile foundation
145. The piles which do not support the load by themselves, but act as a medium to transmit theload from the foundation to the resisting sub-stratum, are known as
A. friction piles
B. bearing piles
C. batter piles
D. compaction piles
Answer: B.bearing piles
146. The piles which are driven in the type of soil whose strength does not increase with depth orwhere the rate of increase in strength with depth is very slow, are known as
A. friction piles
B. bearing piles
C. batter piles
D. compaction piles
Answer: A.friction piles
147. The best spacing of timber piles from centre to centre is……
A. 600 mm
B. 700 mm
C. 800 mm
D. 900 mm
Answer: D.900 mm
148. The maximum load on the wooden pile should not exceed
A. 50 kN
B. 100 kN
C. 150 kN
D. 200 kN
Answer: D.200 kN
149. The length of pre-cast concrete piles varies from
A. 3 m to 4.5 m
B. 4.5 m to 10 m
C. 4.5 m to 20 m
D. 4.5 m to 30 m
Answer: D.4.5 m to 30 m
150. A type of cast-in-situ pile best suited for places where the ground is soft and offers littleresistance to the flow of concrete, is
A. simplex pile
B. Franki pile
C. vibro-pile
D. Raymond pile
Answer: C.vibro-pile
151. The pre-stressed concrete piles as compared to pre-cast and reinforced concrete piles
A. are lesser in weight
B. have high load carrying capacity
C. are extremely durable
D. all of these
Answer: D.all of these
152. A steel pile which function more efficiently in soft clay or loose sand, is
A. H-pile
B. pipe pile
C. screw pile
D. disc pile
Answer: C.screw pile
153. A screw pile consists of cast iron or steel shaft of external diameter varying from
A. 0 to 150 mm
B. 150 to 300 mm
C. 300 to 450 mm
D. 450 to 600 mm
Answer: B.150 to 300 mm
154. Sheet piles are made of
A. wood
B. steel
C. concrete
D. all of these
Answer: D.all of these
155. The coefficient of friction between the concrete and soil is
A. 0.20 to 0.25
B. 0.25 to 0.30
C. 0.30 to 0.35
D. 0.35 to 0.50
Answer: C.0.30 to 0.35
156. When the depth of water is from 4.5 to 6 m, the type of cofferdam used is
A. earthen cofferdam
B. rock fill cofferdam
C. single-walled cofferdam
D. double walled cofferdam
Answer: C.single-walled cofferdam
157. A watertight structure constructed in connection with excavations for piers is………
A. caisson
B. cofferdam
C. well foundation
D. raft foundation
Answer: A.caisson
158. Which of the following is type of cofferdam?
A. Rock-filled crib cofferdam
B. Cellular cofferdam
C. Suspended cofferdam
D. All of the above
Answer: D.All of the above
159. Which cofferdam is suitable at place where velocity of flow is slow & depth of water is 1.5m?
A. Rock-fill cofferdam
B. Earth-fill cofferdam
C. Rock-filled crib cofferdam
D. Cellular cofferdam
Answer: B.Earth-fill cofferdam
160. Rockfill cofferdam can be construction up to _________ m water depth.
A. 3
B. 1.5
C. 4.5
D. 2
Answer: A.3
161. Which cofferdam can be used at a place where working space is limited and depth of water isabout 4m?
A. Single walled cofferdam
B. Earth-fill cofferdam
C. Rock-filled crib cofferdam
D. Cellular cofferdam
Answer: C.Rock-filled crib cofferdam
162. Which cofferdam uses frame made of wooden logs to provide desired shape to cofferdam ?
A. Single walled cofferdam
B. Earth-fill cofferdam
C. Rock-filled crib cofferdam
D. Cellular cofferdam
Answer: C.Rock-filled crib cofferdam
163. Why sand bags are stacked inside single walled cofferdam?
A. To prevent water seepage
B. To resist uplift forces
C. To provide working platform
D. To improve stability
Answer: D.To improve stability
164. Guide piles used in single walled cofferdam are made of which material?
A. Steel
B. Timber
C. Concrete
D. Composite Material
Answer: B.Timber
165. Steel Sheet type double walled cofferdam is suitable at _________
A. Water depth up to 6 to 10m
B. To cover large area
C. When it is not possible to drive guide piles
D. All of the above
Answer: D.All of the above
166. When large area consisting water depth up to 21m which cofferdam is suitable?
A. Double walled cofferdam
B. Concrete cofferdam
C. Cellular cofferdam
D. Rock-filled crib cofferdam
Answer: C.Cellular cofferdam
167. Which type of deep foundation is preferred when large area is to be covered at greaterdepth?
A. Raft Foundation
B. Caisson
C. Coffer Dam
D. Pile Foundation
Answer: B.Caisson
168. Which of the following is not a use of Caisson?
A. To reach hard bearing strata
B. To provide access to deep shaft or tunnel
C. To serve as temporary impervious boundary
D. For the excavation of foundation of piers
Answer: C.To serve as temporary impervious boundary
169. Which of the following is not a type of caisson?
A. Box Caisson
B. Double Wall Caisson
C. Open Caisson
D. Pneumatic Caisson
Answer: B.Double Wall Caisson
170. Which caisson is used when excavation is not required?
A. Box Caisson
B. Double Wall Caisson
C. Open Caisson
D. Pneumatic Caisson
Answer: A.Box Caisson
171. Box caisson can be used up to depth _________ m.
A. 3
B. 1.5
C. 8
D. 12
Answer: C.8
172. Which of the following is not a type of Open Caisson?
A. Single Well
B. Semi-Circle
C. Monoliths
D. Cylinder
Answer: B.Semi-Circle
173. Which of the following is a shape of well caisson?
A. Twin Hexagonal
B. Dumb Well
C. Double – D
D. All of the above
Answer: D.All of the above
174. Which of the following is not a factor in choice of shape of wall?
A. Dimension of Pier or Abutment to be constructed
B. Cost of Sinking
C. Type of Soil at foundation
D. Vertical and Horizontal forces acting on well
Answer: C.Type of Soil at foundation
175. Which shape of well is most suitable to avoid horizontal forces?
A. Single Circular Shape
B. Twin-Octagonal Shape
C. Rectangular Shape
D. Dumb well Shape
Answer: A.Single Circular Shape
176. Which of the following is a component of well?
A. Cutting Edge
B. Steining
C. Bottom Plug
D. All of the above
Answer: D.All of the above
177. Minimum thickness of steining should be _________ cm.
A. 30
B. 45
C. 25
D. 35
Answer: B.45
178. Pneumatic cassions used for a depth up to____________m.
A. 30
B. 45
C. 25
D. 35
Answer: D.35
179. Water is removed from pneumatic caisson using _________.
A. Pumping out of water
B. Passing pressurized air
C. Constructing double wall
D. None of the above
Answer: B.Passing pressurized air
180. Maximum pressure of air inside pneumatic caisson is _______ N/mm2
A. 0.50
B. 0.25
C. 0.35
D. 0.30
Answer: C.0.35
181. Which are the sickness that cannot arise due to working in pneumatic caisson?
A. Dizziness
B. Diarrhea
C. Headache
D. Trouble in speaking
Answer: B.Diarrhea
182. At which temperature caisson sickness can be avoided?
A. 32° C
B. 30° C
C. 25° C
D. 28° C
Answer: C.25° C
183. Which are the forces that acts on Caisson?
A. Seismic Forces
B. Dynamic Forces
C. Wind Forces
D. All of the above
Answer: D.All of the above
184. Which of the following method is not used for Floating of Caisson?
A. Floating by Crane
B. Construction of dry dock
C. Turning of Caisson
D. Use of compressed air
Answer: A.Floating by Crane
185. By which method caisson can be sunk into hard rock?
A. Air and Water Jets
B. Blasting
C. Loading
D. Sand Island
Answer: B.Blasting
186. Why sand island method of sinking of caisson is used?
A. To prevent floating
B. To prevent tilting
C. To stabilize caisson
D. To prevent overturning
Answer: C.To stabilize caisson
187. Which are the problems that can arise during well sinking?
A. Sand blowing
B. Tilting of wells
C. Shifting of wells
D. All of the above
Answer: D.All of the above
188. Which of these problems can occur during de-watering of well?
A. Sand blowing
B. Tilting of wells
C. Shifting of wells
D. All of the above
Answer: A.Sand blowing
189. Tilting of well during sinking can occur due to _________ .
A. Eccentric Loading
B. Water Jetting
C. Use of Explosive
D. All of the above
Answer: D.All of the above
190. The temporary casing is known as the ______
A. support
B. Formwork
C. Builtup
D. casing
Answer: B.Formwork
191. Forms whose components can be reused several times are known as the ______
A. strippling
B. panel forms
C. nevel forms
D. shuttering
Answer: B.panel forms
192. The ______ of formwork plays an significant role in the cost of concrete.
A. Economy
B. conditions
C. work
D. period
Answer: A.Economy
193. The inside surface of formwork should be ________ so as to turn out a good concrete surface.
A. Smooth
B. Undulated
C. Rough
D. Geometrical
Answer: A.Smooth
194. The _______ formwork is used for formwork when it is desired to reuse the formwork severaltimes.
A. wooden
B. Steel
C. Timber
D. None
Answer: B.Steel
195. The column formwork consists of a box prepared from ______ separate sides.
A. One
B. Two
C. Three
D. Four
Answer: C.Three
196. The form work for an RCC floor consists of a ________ to receive the concrete.
A. Beam
B. Block
C. Trap
D. Skeleton
Answer: D.Skeleton
197. In formwork for wall, the _____ are provided by vertical Struts and horizontal wales.
A. Studs
B. Wales
C. Sheets
D. Ties
Answer: C.Sheets
198. _______gives excellent exposed concrete surface requiring no further finishing treatment.
A. Steel
B. Timber
C. Wood
D. Fibre Glass
Answer: A.Steel
199. When form work is required for small ones requiring fewer repetitions, the ________ ispreferred to Steel.
A. Steel
B. Timber
C. Fibre Glass
D. Metal Sheets
Answer: B.Timber
200. It is found that a moisture content of about ______ is appropriate for the timber formwork.
A. 20%
B. 30%
C. 40%
D. 50%
Answer: A.20%
201. The _________ formwork can be reused several time as compared to ordinary Timberformwork.
A. Sunmica
B. Cardboard
C. Plywood
D. Fibre ply
Answer: B.Cardboard
202. In case of formwork for the floor, the ________ supports should be firmly supported at thebottom.
A. Horizontal
B. Vertical
C. Inclined
D. Slanting
Answer: B.Vertical
203. The formwork for ________ consists of stringers, sheets, joist, bearers and vertical post.
A. Walls
B. Columns
C. Beams
D. Stairs
Answer: D.Stairs
204. Which types of vertical loads applies on the caissons?
A. vertical reaction force
B. live load
C. buoyancy
D. all of the above
Answer: D.all of the above
205. What are symptoms of caisson disease?
A. dizziness
B. headache
C. pain in legs
D. all of the above
Answer: D.all of the above
206. Shot drill use………….. for drilling.
A. steel shots
B. steel blade
C. copper balls
D. any one of the above
Answer: A.steel shots
207. Which factors affect the selection of erection equipment?
A. cost of erection
B. hire range
C. size of work
D. all of the above
Answer: D.all of the above
208. Which method not used for the fastening the steel member?
A. anchor bolts
B. washer
C. casting
D. welding
Answer: C.casting
209. Which method not used for the erection of steel bridges?
A. lifting
B. Stagging
C. using barrages
D. ground joining
Answer: D.ground joining
210. Which component used for the erection of plate girder?
A. lattice pole
B. trestle
C. rollers
D. all of the above
Answer: D.all of the above
211. What is maximum diameter of the chimney? (H is height of the chimney)
A. H
B. 0.4 H
C. 0.05 H
D. 2H
Answer: C.0.05 H
212. What is spacing between two steps of chimney?
A. 300 mm
B. 400 mm
C. 200 mm
D. 100 mm
Answer: A.300 mm
213. Which material used for the chimney lining?
A. fire bricks
B. guniting
C. mortar
D. all of the above
Answer: D.all of the above