Topic wise notes as per new NCHM-JNU syllabus (for B.Sc HHA & M.Sc HA) are are now available at our new website hospitality.institute
Visit Now
Select Page
1st Sem Hotel Engg. Notes

Care and cleaning of PC, CPU, Modem, UPS, Printer, Laptops

by

Last updated: 4 July 2023

Care and Maintenance of Computers 

Computers and their peripherals are quite robust and reliable.However, casual use of different components, may lead to serious problems ranging from faulty and unreliable operations to complete stoppage of operation. A few routine care and maintenance schedule can ensure trouble free operation for a reasonable period of time. But in case of serious problems, professional help should also be taken

Care and Maintenance of Printers

The most common problems faced while using a printer are poor print quality, streaking print, white lines through prints, no print, etc.
Most of these problems originate from ink drying up at the print head or nozzle and clogging them during a printing operation.

  • Running the printer at least once a week helps avoid this problem.
  • Use the printer at least on a weekly basis with both black and white and color text printing.
  • Always use printer switch rather than the UPS or Power switch to shut down the unit.
  • Refilling for color cartridge must be done with proper ink in the proper chamber.
  • It is always better to refill an inkjet cartridge before it is empty as the ink of dried up cartridges if left for too long will clog the print head.
  • Laser printers should be kept in a dust-free area.

UPS – Maintenance and Care

A UPS (Uninterruptible Power Supply) provides instant emergency power to connected equipment by supplying power from a separate source (battery) in case of a failure of the main power supply.
The battery is the most important part of the UPS. A periodic maintenance program extends the life of the battery.
The following steps can help establish a good maintenance program for the UPS battery.
UPS – Maintenance and Care (contd..)
Inspection: Periodic inspection should be carried out.
Periodic measurements: of the voltage, temperature, resistance, etc. should be measured to ensure that the battery is operating to its optimum.
Load testing: When the battery can no longer supply 80 % of its rated current, the aging process begins and the battery is considered for replacement. Individual cells of the battery should be monitored so that only the weak or bad cells can be identified and scheduled for replacement.
Record Keeping: All data collected through the above maintenance program should be documented to track the performance of the battery over time.

A Few Good Maintenance Practices for Reliable Operation of Computer Systems

Computer systems are now a part and parcel of modern organizations.
Smooth and efficient functioning of the organization nowadays depends a lot on the continuous and reliable functioning of the systems.

  •  Switch off computers only after the operating system has properly shut down the computer.
  • Always use a UPS.
  • Keep the operating system software and other important utility software in a secured place.
  • Run Scandisk and defragment the file system once a month.
  • Take regular data backup.
  • Keep at least 250 MB of C: drive free.
  •  Do not let many programs load up in the computer memory or RAM when the computer starts.
  • Avoid storing files on the desktop.
  • Run system file checker twice a month.
  • Remove all unnecessary files and folders from ‘My Documents’ directory and empty ‘Recycle Bin’ once a month.
  • Get all critical windows update.
  • Scan the computer with antivirus at least once a week.
  • Install firewall protection for Internet access
  • Clean computer and its accessories on a regular basis.

How useful was this post?

5 star mean very useful & 1 star means not useful at all.

Average rating 2.7 / 5. Vote count: 3

No votes so far! Be the first to rate this post.

We are sorry that this post was not useful for you! 😔

Let us improve this post!

Tell us how we can improve this post?

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