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a) Briefly describe the probable moisture conditions of aggregates with the aid of suitable sketches (5...
With the use of suitable sketches, briefly describe the bonding in the H3+ ion and explain why this ion is considered to be electron deficient.
Describe very!!! SIMPLY and with the aid of sketches/diagrams (OF THE 3-PH SYNCHRONOUS GENERATOR)!!! , the features and operating characteristics (how it works) of a large 3-ph synchronous generator.
1. (a) Briefly describe what is meant by the terms compaction and consolidation [5 marks] (b) In a standard B.S. compaction test, the following data was collected Moisture Content Bulk Density (Mg/m3) 1.87 2.04 2.13 2.20 2.16 2.09 $$5 8 10 13 16 19 Particle specific gravity 2.7 (i)Use a graph to find the maximum dry density and optimum moisture content of the soil shown above [10 marks] (ii) On the same graph, plot the zero and 5% air void...
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(a) With the aid of a labeled sketch, describe an apparatus for the generation of x-rays. (2 marks) (b) With the aid of labeled sketches, describe the three primary physical mechanisms for the absorption ofx-rays in solids. (2 marks) (c) Make a sketch of a typical x-ray spectrum generated by a hospital apparatus, labeling three primary features of the spectrum (3 marks) (d) For an x-ray apparatus containing a molybdenum target...
Problem with different moisture conditions: 5. Calculate the quantities of cement, water, fine aggregate, and coarse aggregate per trial mix of 1 m3 for the following specifications. Target mean compressive strength-30 MPa at 7 days; Cement strength class 42.5; Slump required 100 mm; Max. Aggregate size 20 mm; specific gravity of aggregates 2.65% Coarse aggregate UNCRUSHED (10, 20mm), fine aggregate CRUSHED (50% pass 600 micros); Maximum allowable free- water/cement ratio 0.40; Minimum allowable cement content 275 kg/m3; Absorption of fine...
(e) The tracking or servo type of ADC is a variation of the standard counter type ADC. With the aid of a suitable circuit diagram, describe the operation of an 8-bit tracking or servo ADC, analogue-to-digital converter Outline the conversion steps required for an input of 0.56V, assuming a full-scale output of I V for the DAC. For a 10kHz clock, what is the corresponding conversion time? (7 Marks)
(e) The tracking or servo type of ADC is a variation...
(a) With the aid of a diagram, briefly, but informatively, describe the principle of X- Ray spectroscopy using a nickel atom as an example (8] (b) Briefly explain the following as encountered in analytical chemistry Photoelectnc effect 1) K-absorption edge 11) Dead time of a detector ITURN OVER
(a) With the aid of a sketch, describe briefly the operating principle of a rotary vane compressor (b) State the reasons why oil must be injected into this machine for its efficient operation
(a) With the aid of a sketch, describe briefly the operating principle of a rotary vane compressor (b) State the reasons why oil must be injected into this machine for its efficient operation
Briefly describe the use of profile boards in setting out works in a construction site. Use clear sketches for explanations. b) a) Describe the setting out method for a rectangular structure using a theodolite and tape. c) What is meant by a slope stake? Briefly describe how the position of a slope stake can be established for a road embankment by using a tape and a levelling instrument. d) Calculate the data that are required to establish a batter rail...
With the aid of a clearly labelled diagram, briefly, but informatively, describe a hollow cathode lamp (HCL) commonly used in atomic adsorption spectroscopy (AAS) (b) What other source is used for AAS instead of HCL?