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1st Sem Hotel Engg. Notes

Care and cleaning of overhead projector, slide projector, LCD and power point presentation units

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Last updated: 4 July 2023

Overhead projectors, slide projectors, LCDs, and PowerPoint presentation units are commonly used in hotels for presentations and meetings. However, without proper care and maintenance, these devices can malfunction or fail, leading to delays and inconvenience. Here’s a detailed guide on how to care for and clean these devices to ensure that they operate smoothly.

Overhead Projectors

Overhead projectors are simple devices that use a bright lamp and a lens to project an image onto a screen. To care for and clean an overhead projector, follow these steps:

  • Clean the lens with a soft cloth or lens cleaning solution.
  • Replace the lamp regularly to ensure that the projector remains bright and clear.
  • Clean the base of the projector and the platform where the transparency is placed to remove dust and dirt.

Slide Projectors

Slide projectors use a light source to project an image from a film slide onto a screen. To care for and clean a slide projector, follow these steps:

  • Clean the lens and mirror with a soft cloth or lens cleaning solution.
  • Replace the bulb regularly to ensure that the projector remains bright and clear.
  • Clean the slide tray and slide transport mechanism to remove dust and dirt.

LCDs

LCDs are used in hotels to display PowerPoint presentations and other multimedia content. To care for and clean an LCD, follow these steps:

  • Clean the screen with a soft cloth or LCD cleaning solution.
  • Do not use abrasive or harsh cleaning agents as they can damage the screen.
  • Avoid touching the screen with your fingers, as the oils and dirt can leave marks.

PowerPoint Presentation Units

PowerPoint presentation units are used to display multimedia content from a laptop or computer. To care for and clean a PowerPoint presentation unit, follow these steps:

  • Clean the screen and the unit with a soft cloth or cleaning solution.
  • Ensure that the cables and connectors are properly connected to avoid signal loss or interference.
  • Store the unit in a dry and cool place when not in use.

In conclusion, proper care and cleaning of overhead projectors, slide projectors, LCDs, and PowerPoint presentation units are essential to ensure that they operate smoothly and provide the best possible image quality. By following these guidelines, hotel owners and managers can ensure that their devices are well-maintained and provide a great presentation experience.

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Syllabus BHM106

01 Maintenance

  1. Introduction
  2. Preventive and breakdown maintenance, comparisons
  3. Role & Importance of maintenance department in the hotel industry with emphasis on its relation with other departments of the hotel.
  4. Organization chart of maintenance department, duties and responsibilities of maintenance department

02 Fuels used in the catering industry

  1. Introduction
  2. Types of fuel used in catering industry; calorific value; comparative study of different fuels
  3. Calculation of amount of fuel required and cost.

03 Gas

  1. Introduction
  2. Heat terms and units; method of transfer
  3. LPG and its properties; principles of Bunsen burner, precautions to be taken while handling gas; low and high-pressure burners and their corresponding heat output
  4. Gas bank, location, different types of manifolds

04 Electricity

  1. Introduction
  2. Fundamentals of electricity, insulators, conductors, current, potential difference resistance, power, energy concepts; definitions, their units and relationships, AC and DC; single phase and three phases and its importance on equipment specifications
  3. Electric circuits, open circuits and close circuits, symbols of circuit elements, series and parallel connections, short circuits, fuses; MCB, earthing, the reason for placing switches on the live wire side.
  4. Electric wires and types of wiring
  5. Calculation of electric energy consumption of equipment, and safety precautions to be observed while using electric appliances.
  6. Types of lighting, different lighting devices, incandescent lamps, fluorescent lamps, other gas-discharged lamps, illumination, and units of illumination.
  7. External lighting
  8. Safety in handling electrical equipment

05 Water systems

  1. Introduction
  2. Water distribution system in a hotel
  3. Cold water systems in India
  4. Hardness of water, water softening, base exchange method
  5. Cold water cistern swimming pools
  6. Hot water supply system in hotels
  7. Flushing system, water taps, traps and closets.

06 Refrigeration & Air-conditioning

  1. Basic principles, latent heat, boiling point and its dependence on pressure, vapour compressor system of refrigeration and refrigerants.
  2. Vapour absorption system, care and maintenance of refrigerators, defrosting, types of refrigerant units, their care and maintenance.
  3. Conditions for comfort, relative humidity, humidification, dehumidifying, due point control, unit of air conditioning
  4. Window type air conditioner, central air conditioning, preventive maintenance
  5. Vertical transportation, elevators, escalators

07 Fire prevention and fire fighting system

  1. Classes of fire, methods of extinguishing fires (Demonstration)
  2.  Fire extinguishers, portable and stationery
  3.  Fire detectors and alarm
  4. Automatic fire detectors cum extinguishing devices
  5. Structural protection
  6. Legal requirements

08 Waste disposal and pollution control

  1. Solid and liquid waste, sullage and sewage, disposal of solid waste
  2.  Sewage treatment
  3. Pollution related to the hotel industry
  4. Water pollution, sewage pollution
  5. Air pollution, noise pollution, thermal pollution
  6. Legal Requirements

09 Safety

  1. Accident prevention
  2. Slips and falls
  3. Other safety topics

10 Security

11 Equipment replacement policy

  1. Introduction
  2. Circumstances under which equipment are replaced.
  3. Replacement policy of items which gradually deteriorates
  4. Replacement when the average annual cost is minimum
  5. Replacement when the present cost is minimum
  6. The economic replacement cycle for suddenly failing equipment

12 Audio-visual equipment

  1. Various audio-visual equipment used in hotel
  2. Care and cleaning of an overhead projector, slide projector, LCD and PowerPoint presentation units
  3. Maintenance of computers
  4. Care and cleaning of PC, CPU, Modem, UPS, Printer, Laptops
  5. Sensors – Various sensors used in different locations of a hotel – type, uses and cost-effectiveness

13 Contract maintenance

  1. Introduction
  2. The necessity of contract maintenance, advantages and disadvantages of contract maintenance
  3. Essential requirements of a contract, types of contract, their comparative advantages and disadvantages.
  4. Procedure for inviting and processing tenders, negotiating and finalizing