It is what is it
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| show | A four-wheel-drive tractor weighs 20,000 kg and produces a maximum rimpull of 18,160 kg at sea level. The tractor is being operated at an altitude of 3050 m on wet earth. A pull of 10,000 kg is required to move the tractor and its load. Compute the maximu
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| 21% | show 🗑
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| show | What are the factors predicting the safe load capacity of bulb piles?
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| 5090 m/s 11.6 m | show 🗑
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| show | The tube of a mercury thermometer has an inside diameter of 0.140 mm. The bulb has a volume of 0.255 cm³. How far will the thread of mercury move when the temperature changes from 11.5°C ta 33.0°C? Take into account the expansion of Pyrex glass.
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| show | Part of a turn-around area in a parking lot is shaped like a circular segment. The segment has a central angle of 120° and a radius of 75 ft. If the circular segment is to receive a special surface treatment, what area will be treated?
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| show | A pile driving hammer emits 143 W of sound power when operating. What is the maximum areal sound power density at the ground when 10.7 m of pile remains to be driven? Assume isotropic reflection and disregard reflected power.
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| show | A breeder reactor converts relatively stable uranium-238 into the isotope plutonium-239. After 15 years it is determined that 0.043% of the initial amount A, of the plutonium has disintegrated. Find the half- life of this isotope if the rate of disintegra
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| show | The following yield data are obtained from five identical treatment plants.
(a) Develop a mathematical equation to correlate the yield and average temperature.
(b) What is the correlation coefficient?
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| 2.94 | show 🗑
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| 81.85 kph | show 🗑
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| 8.0 x 10⁵ | show 🗑
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| The Hazards are driving off the road due to distraction or inattention tipping over (whipping) at high speeds difficulty in getting proper superelevation | show 🗑
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| show | Find the maximum safe unsupported height in meters for a 20-cm heavyweight concrete block wall if the maximum expected wind velocity is 80 kph.
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| show | Construction of a 50-ft-wide roadway requires fill between station 10 0.00 and station 11 0.00. The table below shows required depth of fill (ft) at various horizontal offsets (ft) from the centerline of the roadway alignment. Earthwork is to be calculate
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| show | A room is 35 ft 25 ft in plan. Ceiling height is 14 ft. Openings for doors and windows total 85 ft2.
The following data is given for plastering and painting operations.
Plaster and paint crew:
1 supervisor $30/hr
1 laborer $12/hr
2 painter
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| show | Suppose a student carrying a flu virus returns to an isolated college campus of 1000 students. If it is assumed that the rate at which the virus spreads is proportional not only to the number x of infected students but also to the number of students not i
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| show | Use Cramer's rule to solve for the values of x, y, and z that simultaneously satisfy the following equations:
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| 30 mins | show 🗑
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| 120.4 | show 🗑
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| show | The plan of a survey plotted to a scale of 10 m to 1 cm is reduced in such a way that a line origi- nally 10 cm long now measures 9 cm. The area of the reduced plan is measured as 81cm². The actual area (m²) of the survey is
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| show | The plan of a map was photo copied to a reduced size such that a line originally 100 mm, measures 90 mm. The original scale of the plan was 1:1000. The revised scale is
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| show | In quadrantal bearing system, bearing of a line var- ies from
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| P3, Q1, R2, S4 | show 🗑
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| 1/( (1/Wx) + (1/Wy) + (1/Wz) ) | show 🗑
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| 1:5000 | show 🗑
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| show | A concrete mix contains cement, moist sand, and moist coarse aggregate in the following
proportions by weight: 1.1.8.2.6. The following specifications are given:
Cement
specific gravity-3.15
SSD sand (m.c. = 0.5%) specific gravity 2.70
SSD
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| show | A landfill accepts municipal solid waste from town A (population 20,000). The landfill has been in operation for 6 years and has remaining capacity of 1,000,000 yd³. A new subdivision (population 5,000) is developed and populated. The waste generation rat
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| 11 | show 🗑
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| 7 | show 🗑
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| show | 3. A water supply board is responsible for treating 1500 m3/day of water. A settling column analysis indicates that an overflow rate of 20 m/day will produce satisfactory removal for a depth of 3.1 m. It is decided to have two circular settling tanks in p
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| show | The present population of a community is 28,000 with an average water consumption of 4200 m3/d. The existing water treatment plant has a design capacity of 6000 m3/d. It is expected that the population will increase to 44,000 during the next 20 years. The
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| show | The population of a city at previous consecutive census year was 4,00,000; S5,58,500; 7,76,000 and 10,98,500. The anticipated population at the next census to the nearest 5,000 would be
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| 385.7 | show 🗑
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| 200 m² | show 🗑
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| 6.2967 | show 🗑
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| show | A town has an existing horizontal flow sedimentation tank with an overflow rate of 17 m3/day/m2, and it is desirable to remove particles that have setting velocity of 0.1 mm/sec. Assuming the tank is an ideal sedimentation tank, the percentage of particle
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| 0.02 mm | show 🗑
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| 32400 | show 🗑
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| 350 | show 🗑
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| 0.005 mm/s | show 🗑
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| show | The following data are given for a channel-type grit chamber of length 7.5 m.
flow-through velocity = 0.3 m/s
the depth of wastewater at peak flow in the channel = 0.9 m
specific gravity of inorganic particles = 2.5
g = 9.80 m/s2, μ = 1.002 ×
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| 90 m² | show 🗑
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| 144 | show 🗑
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| show | 17. A groundwater sample was found to contain 500 mg/l total dissolved solids (TDS). TDS (in %) present in the sample is
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| show | An existing 300 mm diameter circular sewer is laid at a slope of 1:280 and carries a peak discharge of 1728 m3/d. Use the partial flow diagram shown in the figure below and assume Manning's n = 0.015. At the peak discharge, the depth of flow and the veloc
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| 0.50 m | show 🗑
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| show | 16 MLD of water is flowing through a 2.5 km long pipe of diameter 45 cm. The chlorine at the rate of 32 kg/d is applied at the entry of this pipe so that disinfected water is obtained at the exit. There is a proposal to increase the flow through this pipe
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| 1.00 | show 🗑
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| 0.00023 | show 🗑
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