GENERAL SCIENCE AND TECHNOLOGY
Total
Marks – 100
(For
General Cadre only)
Introduction:
This is intended to test candidates’ basic knowledge and understanding about
application of science and technology in our daily life.
Part
– A: General Science
Marks
- 60
i.
Light: Nature, Spectrum, Different colours and wavelengths, UV, IR, and
LASER, Reflection of Light, Refraction of Light, Total Internal Reflection of
Light, Lenses, Thin converging lens,
Dispersion
of light, particle nature of light, Einstein’s photoelectric equation,
photocells
ii.
Sound: Hearing mechanism, Decibel, Frequency, Sound machines in home and
around –,
Microphone,
Loud speaker, Public address system, Characteristics of a sound note, Formation
of
stationary
waves in stretched string, Laws of vibrating strings, Beats, Doppler Effect,
Applications and limitations of Doppler Effect, Echoes, Absorption of sound
wave, Reverberations, Fundamentals of Building acoustics, Statement of Sabine's
formula
iii.
Magnetism: Polarity and relationship with current, Bar magnet, Magnetic
lines of force, Torque on a bar magnet in a magnetic field, Earth’s magnetic
field as a bar magnet, Tangent galvanometer, Vibration magnetometer, Para, dia
and ferromagnetic substances with examples, Electromagnets and permanent
magnets
iv.
Acid, Base and Salt: Acid-base concepts; characteristics of acids and
bases; acid-base indicators; uses of acids and bases in daily life and caution
in handling them; social effects of misuse of acids; reason for acidity in
stomach and selection of the right food; pH; measurement and importance of pH of
substances; salts; characteristics of salts; necessity of salt in daily life;
uses of salts in agriculture and industries
v.
Water: Properties of water; melting and boiling points of water;
electrical conductivity; structure of water; hydrogen bonding; sources of
water; sources of fresh water in Bangladesh; water quality parameters (colour
and taste; turbidity; presence of radioactive substances; presence of waste; dissolved
oxygen; temperature; pH and salinity); recycling of water; role of water in
conservation of nature; necessity of quality water; purification of water
(filtration; chlorination; boiling and distillation); reasons for pollution of
water sources in Bangladesh; effects of water pollution on plants, animals and
human beings; effects of global warming on fresh water; strategy for preventing
water pollution and responsibility of citizens or public awareness; prevention
of water pollution by industries; prevention of water pollution due to soil
erosion from agricultural land; conservation of water sources and development
vi.
Our resources: Soil; types of soil; soil pH; reasons and effects of soil
pollution; natural gas and its main compositions; processing, uses and sources
of natural gas, petroleum and coal; forestry; limitations and conservation of
our resources
vii.
Polymer: Natural and synthetic polymer; polymerization process; sources,
characteristics and usage of natural and synthetic polymers; manufacturing
process, characteristics and uses of fibers, silk, wool, nylon and rayon;
physical and chemical properties of rubber and plastic; role of rubber and plastic
for environmental imbalance; aware of using rubber and plastic
viii.
Atmosphere: Biosphere and Hydrosphere, Ionosphere, role of oxygen,
carbon dioxide and nitrogen. Potable and polluted water, Pasteurization.
ix.
Food and Nutrition: Elements of food; carbohydrates; protein; fats and
lipid; vitamins; types and sources of carbohydrates, proteins; nutritional
value; menu of balanced diet; the pyramid of balanced diet; body mass index
(BMI); fast food or junk food; preservation of food; various processes of storing
food; use of chemicals for preservation of foods and its physiological effects
x.
Biotechnology: Chromosome; shape, structure and chemical composition of
chromosome; nucleic acid; deoxyribonucleic acid (DNA); ribonucleic acid (RNA);
protein; gene; DNA test; forensic test; genetic disorder in human beings;
Biotechnology and Genetic Engineering; cloning; social effects of cloning;
transgenic plants and animals; Use of biotechnology in agricultural, milk
products and pharmaceutics; Gene therapy; Genetically modified organism;
Nanotechnology; Pharmacology; Pharmacokinetics
xi.
Disease and Healthcare: Deficiency, Infection, Antiseptic, Antibiotics,
Stroke, Heart Attack, Blood Pressure, Hypertension and Diabetes, Dengue;
Diarrhoea; Drug addiction, Vaccination, Cataract, food poisoning, X-ray;
Ultrasonography; CT Scan; MRI; ECG; Endoscopy; Radiotherapy; Chemotherapy;
Angiography; uses, risk and side-effects of above techniques; Basic concept of Cancer,
AIDS and Hepatitis
Part
– B: Computer and Information Technology
Marks
- 25
i.
Computer Technology: Organization of modern personal computer and its
major functional units, computer generations, History of computers, central
processing unit and microprocessor, computer memories and their classification
and characteristics, input and output devices with characteristics and uses.
The role of BIOS. Bus architecture, Motherboard and its components, functions
and organization of microprocessors, Arithmetic Logic Unit(ALU), Control unit,
Language translator, Text editor, Compiler, Interpreter, Computer software,
system software, operating system, application software with examples of
applications, Computer virus, office automation. Computational biology; Role of
computer in Drug design; Programming languages, their types and levels, steps
for software development. Impacts of computer on society.
ii.
Information Technology: Data communication and information, information
collection, processing, and distribution, System analysis and information
systems, expert systems. Database software and structures, Database Management
System(DBMS), Basics of multimedia systems with examples of hardware and
software, concept of data compression, multimedia system development life
cycle.
Local
area, metropolitan area and wide area computer networks,(LAN, MAN,WAN ), LAN Topology,
Networking devices(Router, Switch, HUB),TCP/IP Protocol suite, Internet,
Internet services and protocols, Internet Service Providers(ISPs) and their
responsibilities, intranet and extranet, Word Wide Web(WWW) and web technology.
Popular websites. Access control security and privacy. E-mail, Social media
(facebook, twitter, blog ) and their impacts. Different types of Transmission
media with examples, bandwidth. Major components of telecommunication systems, mobile
telephone systems, satellite communication systems and VSAT, importance of fibre
optic communication system, Wi-Fi, E-Commerce technology and its impact to
society, examples of Ecommerce websites, B2B, B2C, M-Commerce, Smart phones,
GPS
Part
– C: Electrical and Electronic Technology
Marks
- 15
iii.
Electrical Technology: Electrical components, voltage, current, Ohm’s
Law, Electrical power and energy, Electromagnet and magnetic field,
electromagnetic induction, Circuits Breakers, GFCI’s and Fuses, Power
Distribution and Series circuit, Voltage Sources in a Series, Kirchoff’s
Voltage Law, Voltage Division in a Series Circuit, Interchanging Series
Elements, Voltage Regulation and the Internal Resistance of Voltage Sources,
Parallel Resistors, Parallel Circuits, Power Distribution in a Parallel Circuit,
Kirchhoff’s Current Law, Open and Short Circuits, Generation of AC and DC voltages,
thermal, hydraulic and nuclear power generators. Electric motors and their
applications. Transformers, AC transmission and distribution, Electrical
instruments, voltage stabilizers, IPS and UPS.
iv.
Electronics Technology: Electronic components, analog and digital
signals, analog electronic devices, amplifiers and oscillators, resistance,
types of resistors, conductance, ohmmeters, Capacitance, Capacitors, Inductors,
Inductance, Sinusoidal Alternating, Waveforms, Frequency Spectrum, The
Sinusoidal Waveform, General format for the sinusoidal Voltage of current,
Phase Relations, The Basic Elements and Phasors, Response of Basic R,L and C,
Elements to a Sinusoidal Voltage or Current, Frequency Response of the Basic
Elements, Average Power and Power Factor, Complex Numbers, Rectangular Form,
Polar Form, Conversion between Forms, Impedance and the Phasor Diagram,
Introduction to 3 phase Systems, Elementary Concepts of Generation, Transmission,
and Distribution, Various Levels of Power, Basic Concepts of Transformers,
radio, television, and radar. Digital devices and digital integrated circuits,
impact of digital integrated circuits, counters and digital display devices,
digital instruments.
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