A hydraulic punching machine is used to make holes in a plate using two steel punches having
different diameter. By applying a compressive stress of 37 x103 kN/m2 using a punch of diameter
50 mm, the maximum shear stress developed in the plate was found to be 290 N/mm2. Suggest the
value for thickness for the plate suitable for this loading condition.
What will be the change in the shear stress when a compressive force of 85 kN is applied on the
plate of same thickness using another punch having diameter 12% more than the first one? Check
which one of the steel punches used is safe against shear, if the permissible safe shear stress on
the plate based on the design conditions is limited to 300 N/mm2. Based on the results, discuss
how the thickness of the plate and the diameter of the punch can be modified to withstand the safe
shear stress.

Deflection tests were conducted on a steel joist and a timber joist both simply supported over
a span of 5 m and carrying a point load of 45 kN at distance of ‘a’ from left support. Maximum
deflection was observed at a position 2.4 m from the left support for steel joist and 1.85 m from
the left support for steel joist. Calculate and compare the results for maximum deflection, slope at
both ends and deflection under the load for both steel and timber joists. Take Flexural rigidity for
steel joist as 14 x 1012 Nmm2 and the Flexural rigidity for timber joist as 6.9 x 1012 Nmm2. Suggest
the changes to be made in the dimensions of the beam for reducing the deflection based on the
results obtained.

Write the procurement guidelines for the Tender preparation, evaluation and the contract award

State True/False

a. Storm sewers are usually designed using an assumption of gradually varied flow.

b. While water is being removed from a distribution system to fight a fire, the elevation of the hydraulic grade line tends to decrease.

c. A three-hour unit hydrograph represents a storm that produces three inches of runoff during the first hour of precipitation.

d. Adjusting the downstream weir in the 4ft wide indoor flume is the usual way to change the discharge

e. A prismatic channel has a rectangular cross-section

f. A pressure of 10 psi corresponds to a head of 23 ft of water

1. If a wooden stake reads ⑤, what does it mean?

Group of answer choices

1. 5 ft offset
2. No. 5 stake
3. No. 5 corner
4. 5 ft from the permanent marker

2. On a wooden stake, it writes 10' o/f. What does it mean?

Group of answer choices

1. 10 ft offset
2. 10 ft cut
3. 10 ft fill
4. station 10

3. Which of the following describes the operation of giving line and grade.

Group of answer choices

1. Place reference marks or stakes to establish the location and elevation of a project.
2. Drawthe line and grade on paper.
3. Mark on drawings with the grade of lines.
4. Establish a line between two unkown points.

4. Which of the following statement about giving line is correct?

Group of answer choices

1. Giving line doesn't involve angles.
2. Only one mark is needed for each line.
3. The process of giving line consists in establishing a direction by turning a predetermined angle and placing a series of marks along the line at predetermined distances.
4. A tape measure is adequent for the whole operation of giving line.

5. A mark is to be set at an angle of 70°00′00′′ from a given line at a distance of 500 ft from the instrument. After setting the mark, the angle is measured by repetition and determined to be 69°59′30′′. How far should the mark be shifted so that the angle is set at 70°00′00′′?

Group of answer choices

a. 0.1 ft

b. 0.2 ft

c. 0.053 ft

d. 0.073 ft

6. The HI of a level is 567.89 ft. A blue top is to be set to mark a grade of 558.12 ft. What is the value of grade rod?

Group of answer choices

a. 7.89 ft

b. 9.77 ft

c. 6.54 ft

d. 3.36 ft

7. It is required to set a stake to mark a grade of 45.49 ft. The HI of the level is 53.56 ft and the rod on stake reads 4.32 ft. Determine the amount of cut (C) or fill (F) to be marked on the stake.

Group of answer choices

1. cut 8.07 ft
2. fill 8.07 ft
3. cut 3.75 ft
4. fill 3.75 ft

8. It is required to set a stake to mark a grade of 53.72 ft. The HI of the level is 60.05 ft and the rod on stake reads 10.93 ft. Determine the amount of cut (C) or fill (F) to be marked on the stake.

Group of answer choices

1. cut 6.33 ft
2. fill 6.33 ft
3. cut 4.6 ft
4. fill 4.6 ft

9. Which of the following statement about batter board is wrong?

Group of answer choices

1. It is a standard method for temporarily referencing the building corners.
2. A batter board is simply a horizontal wooden plank fastened to two vertical posts.
3. Batter boards need to cover the whole building perimeter.
4. Batter boards can show both horizontal location and grade.

10. Which of the following statement about laser is wrong?

Group of answer choices

1. A laser is a bright beam of monochromatic light.
2. A single-beam laser projects a narrow “string line,” easily visible as a bright dot on a flat surface or target.
3. The single-beam laser can be used to give line.
4. A rotating-beam laser can be used to give line.

‏Q4. Compare and explain the common relationship between the units of angular
‏measurement with neat labelled sketch.

‏Q5. Differentiate between the Whole circle bearing and Quadrantal bearing system with neat
‏suitable sketches.

Assessment 11.0: Welding processes

Produce a short report with diagrams (min 300 words) on the jointing of rail using welding techniques including:

• Alumino-thermic

• Flash butt welding

if you know the answer could you write it in text as I don't understand the handwriting

Assessment 9.0: Hand back process

Produce a report (min 250 words) to detail the hand back process as defined by the Infrastructure Controller, and detail the factors that should be considered as part of the hand back process including the potential areas for special consideration which should be confirmed. Detail the requirements for maintenance records which form part of the hand back process.

Write it in text if you know the answer as I don't understand the handwriting

The building is going to be made in eastern part of Anatolia (Eastern part of Anatolia means there is a risk of freezing and thawing) and carbonation induced corrosion at low level is the dominant exposure condition. Choose the proper exposing conditions for this case by using the TS EN 206 Concrete Standard. Also determine the corresponding minimum requirements for the concrete mixture in the given environment by using the same standard.

4. The following data were obtained from a creep test for a specimen having an

initial gage length of 2.0 in. and an initial diameter of 0.6 in. The initial stress

applied to the material is 10,000 psi. The diameter of the specimen after fracture

is 0.52 in.

Determine:

1. The load (lb_f) applied to the specimen during the test
2. The approximate length of time (h) during which linear creep occurs
3. The creep rate in in./in. h and %/h, and
4. The true stress acting on the specimen at the time of rupture

Design a PCC mix for the following scenario:

CE 20400 Spring 2020

Design Environment: Unreinforced Slab in Minneapolis, Minnesota

                                   Consider the city to be a cold climate with severe weather

Required design strength: 4500 psi

Slab thickness:                   18 inches

Statistical data indicate a standard deviation of compressive strength of 200 psi

      (more than 30 samples)

Only air entrainer allowed

Air entrainer: Manufacturer specification is: 0.20 fl oz/1% air/100 lb cement

Course aggregate:             1 ½” nominal maximum size crushed stone

                                            Bulk oven dry specific gravity 2.5

                                            Absorption 0.2%

                                            Oven-dry rodded density 125 pcf

                                            Moisture content 1.5%

Fine aggregate:                  Natural sand

                                            Bulk oven dry specific gravity 2.45

                                            Absorption 0.2%

                                            Moisture content 4%

                                            Fineness modulus 2.8

Cement                               Specific gravity 3.15

5: Three bars of varying cross section are connected to each other and is subjected to an axial
force of 50 kN as shown in figure. The dimensions of the two outer bars are 40 mm x 40 mm and
length of the outer bars are measured to be the same. The middle bar is having circular cross
section and the length of the middle bar is 3 times more than that of the two outer bars. Stress in
the middle portion was observed to be 180 N/mm2 and the total extension of three bars is equal to
7.534 mm. Recommend a suitable value for the diameter of the middle bar and length of all three
sections, if the modulus of elasticity of the material is 80 x 105 N/cm2?
If all the three bars are made up of the same material and having modulus of rigidity of the
material equal to 320 tonnes/cm2, what will be the changes in lateral dimensions for all three
bars? Conclude the relationship between lateral strain and longitudinal strain based on your
findings.