manufacturing questions: a. Estimate the number of particles in a 500-g sample of iron powder if the particle size is 50 microns.

b. Describe the differences and similarities in processing metal powders vs. ceramics.

1- Bring out their significance of evaporation, transpiration and evapotranspiration. (i) in arid region, and (ii) in humid region.

2- Explain various factors, which affect infiltration? And using sketches/diagrams explain Horton's method of determining the infiltration capacity of a soil surface.

c)- What are the most important 5 methods of estimating runoff from a catchment?

Two concentrated loads each 10kN are applied vertically on an elastic, homogenous and isotropic single layer flexible pavement. The distance between the left and right wheel is 350mm. Calculate the radial stress at point A, which is located 70mm horizontally, 90mm tangentially and 100mm vertically from the left wheel load.

1)What is the advantages of gypsum?

a)fire proofing ( X )       b)heat treatment ( )         c)cheap ( )      d)disintegrate in the moisture ( )

2) Where can use the hydraulic lime?

a)bridge ( )               b)building ( X )          c)under sea ( )           d)roads ( )

3) Why alkali oxides (Na2O and K2O ) in cement are harmful ? because they:

a) increase heat of hydration ( )    b)decrease strength of cement ( )   c)react with alkali of aggregates ( )

d)retard the setting time of cement ( )

4)Loss Of Ignition (LOL) indicates _____ or _____ due to prologned or improper storage:

a)prehydation or oxidation ( )      b)prehydration or carbonation ( )   c)oxidation or carbonation ( )

d) non of them ( )

5)which oxide of cement hydrates later than others:

a)SiO₂ ( )             b)Fe₂O₃ ( )         c)K₂O ( )         d) CaO ( )

6)Which components of cement hydrates faster:

a) C₃S ( )              b)C₂S (   )         c)C₃A ( )             d) C₄AF ( )

7) Which rock is not an ingnious rock:

a)shale ( )      b)pumice ( )       c)Quartz ( )     d)basalt ( )

8)Whrere can use the “specific gravity” of aggregates in concrete? To calculate:

a)mix design ( )     b) abrasion resistance ( )    c)compressive strength ( )   d)splitting tensile strength ( )

9)Which test is usefull for determining the workability of “Fiber Reinforced Concrete” ?

a)slump test ( )    b)compacting factor ( )   c)flow table ( )    d) Vebe test ( )

10)Which factor does not have affecting on drying shrinkage?

a)size and shape of structure ( )                                        b)amount of distribution of aggregates ( )                                            c)amount of distribution of reinforcement ( )                  d)humidity of enviroment (   )

11) Which type of shrinkage occur before concrete has set?

a)carbonation shrinkage ( )   b)plastic shrinkage ( )   c)autogenous shrinkage ( ) d)drying shrinkage ( )

12) Which factor is related to Internal Durability ?

a)permeability ( )         b)volume change of aggregates ( )            c)alkali reaction ( )                                             d)attack of industrial liquids ( )

13)Which factor has been affected on workability of concrete?

a)W/C ratio ( )       b)shape of aggregates ( ) c)grading of aggregates ( )   d)all components ( )

14) The chemical reaction between water and cement known as ___________?

a)oxidation (   )    b)hydration (   )     c)carbonation (   )     d)calcination ( )

15) During slaking of lime heat evolves and _______?

a)burn lime ( )     b)volume expands ( )   c) hydration strated ( ) d)react with water ( )

16)Which fault occur due to the improper vibration of concrete?

a)shrinkage ( )   b)compation ( )    c)segregation ( )    d)bleeding ( )

17)What kind of aggregate can reacti with cement?

a)fine aggregates ( )   b)coarse aggregates ( )   c)alkali aggregates ( )    d)methamorphic rocks ( )

18) during the handiling of fresh concrete, what are the most important factors affecting on selection method?

a)econimic ( )        b) maintained the quality of concrete ( )               c)increase strength of concrete ( )    d) a and b ( )

19) __________ in the pure state is white but combined with impurities it may grey, brown or reddish brown?

a)gypsum ( )       b)lime (   )          c)cement ( )      d)sedimantary rocks ( )

20)which type of cement is suitable for concreting in cold wheater ?

a) Ordinary PC( )    b)rapid hardening PC ( )    c)low heat PC ( )    d)sulfate resistance PC ( )

21) which type of cement is used for concerting in sea water?

a)Ordinary PC ( )     b)sulfate resistance PC ( )      c) high aluminum Cement ( )                                                    d) white portland cement ( )

22 ) which type of cement is used in dam constructions?

a) masonary cement( )    b)rapid hardening PC ( )         c)low heat PC ( )     d)sulfate resistance PC ( )

23) Which type of cement is only used for architectural purpose?

a) ground granulated blast furnance slage ( )   b)natural cement ( )     c)wihte portland cement ( ) d)portland pozzolan cement ( )

24)which test is used for low workable concrete?

a) slump test (   )     b)compacting factor ( )    c) flow test ( )      d) kelly ball test ( )

Design the flexible pavement using Group index method and California bearing ratio method using the following data and compare the pavements.

Soil portion passing 75 micron sieve = 60%

Liquid limit = 43% and plastic limit = 28%

Area of the plunger = 19.6 cm2

Load at 2.5 mm penetration = 45kg

Load at 5 mm penetration = 68kg

Sub-base CBR = 30%

Base course CBR = 70%

Expected traffic = 900 vehicles per day.

A rectangular channel 2 m wide has a bottom slope of 0.01 and a roughness
coefficient of 0.017. A sluice gate 2 m wide is located in the channel. The sluice
gate has a contraction coefficient of 0.61 and a discharge coefficient of 0.58. The
depth of water just upstream from the gate is 2 m. The depth of water just
downstream from the gate is 0.5 m. Determine how far upstream from the gate
the depth of water will be within 1% of the normal depth.

List and explain at least three assumptionsthat are generally considered when using
vertical photographs to derive geometric information of the object space.

After the description has been written, the litmus test to a good description is that closes.

True

False

A plat is required if at least one tract of the subdivision is five acres or less.

True

False

Using the rational method, determine the amount of runoff that would occur for a paved parking lot that is 100m * 50m and is uniformly sloped from one long edge to the other long edge at a rate of 2%. The time of concentration for this parking is 4 minutes. The five-year storm with duration of 4 minutes has an intensity of 10 mm/hr. The runoff coefficient for this parking lot is 0.80.آ [Q=0.166 CIA]
The runoff from part (a) is to be contained in a trapezoidal drainage ditch with the following properties: side slope = 2m horizontal run for every 1 m rise, width of invert = 2m, longitudinal slope = 0.005 m/m, and Manning's number = 0.08. If the maximum permittedآ depth of water is 100 mm, using Manning's equation for open channel flow, determine if the ditch will be able to accommodate the flow in part (a).

You are to carry out a research using the internet and identify at least five different innovative ideas for intersection or road design to improve Road Safety and/or traffic flow. For each idea, provide a description of the idea, a photo or illustration of the design, where has it been used, advantages and disadvantages of the idea, and the source of the information (internet webpage/link will be sufficient).