HOME SCIENCE PAPER 1 Marking Scheme - 2017 MURANG'A MOCK EXAMINATION

1. Two important rights of a consumer
   • The right to receive correct information on products and services
   • Right to safety
   • To be heard
   • To choose among alternatives &
   • Right to compensation Any 2x 2   =  ( 2mkarks)

2. Two groups of synthetic fibres :-
   • Polyamides e.g. nylon
   • Polyesters
   • Acrylic         any    2 x  1  ( 2mks)

3. Two methods used to coat food before frying  :-
   • Use of eggs and breadcrumbs
   • Use of butter
   • Use of seasoned flour  ( 2 x 1  ( 2mks)

4. Two qualities of a well- made dart
   • Well secure
   • Tapers to a point
   • Straight stitching line
   • Pressed to the right direction
   • Flat         2 x  1   (2mks)

5. Four foods to manage kwashiorkor
   • Milk
   • Meat
   • Beans
   • Fish
   • Eggs
   • Peas       4   x  ½     (2mks)

6. Seams suitable for trouser side seam (heavy fabric)
   • Open seam
   • Double stitched seam (Machine fell)
   • Plain seam  ( 2mks)

7. Points when buying a seam ripper
   • Blade should be sharp
   • Should have a cover
   • Should be made of stainless steel/ material 2  x  1   =   ( 2mks)

8. Two surfaces cleaned by scrubbing:-
   • Cemented floor
   • Terrazzo surfaces
   • Wooden  surface     2 x  1   (2mks)

9. Two uses of Talcum powder on the feet
   • To dry the feet completely esp. btn toes
   • To prevent athletes foot
   • To cure athletes foot        ( 2 x   1   = 2mks)

10. Dangers of smoking during pregnancy
    • Retarded growth of the baby
    • Underweight babies born      ( 2mks)

11. Reasons for lining a cake tin:-
    • To prevent sticking
    • Retain good shape of cakes
    • Prevent contamination from baking tin
    • Prevent burning.

12. Why stainless steel is unsuitable
    • May scratch easily
    • Light metals would get too hot too quickly and might burn food.
    • Poor conductor of heat; creates hot spots         2  x  1   ( 2mks)

13. Reasons why babies fed on formula milk diarrhea
    • Feeding  eq. may not have been hygienically handled.
    • Changes in dilution can cause it
    • Water used may have been contaminated.   2  x  1  (2mks)

14. Advantages of having labels on consumer products
    • One knows the contents of product.
    • Show expiry dates for foods & drugs
    • Knows the brand of produc
    • Would know the manufacturer.   2 x 1 (2mks)

15. Qualities of a well made sleeve
    • Crown properly matched with shoulder
    • Seam for good hang
    • Sleave seams should be matched
    • Wth side seams, should seam with crown to obtain good balance
    • The cap should be smoothly rounded.
    • The fullness should be evenly ddistributed.
    • The stitchery should be firm and neat
    • Armhole seamline should be smooth and strong.
    • The sleeve should be trimmed evenly to reduce bulk & neatened appropriately.
    • Both sleeves should be of the same length and shape. 2 x 1 (2mks)

16. Advantages of habit training
    • Learn to share toys
    • Learns ownership
    • Develop physically, mentally & Psychologically
    • Learn to be responsible 2 x 1      ( 2 mks)

17. 4 ways of decorating an apron
    • Use of lace
    • Binding
    • Facing R.S
    • Embroidery stitches
    • Shell edging ,  any   4  x  ½  (2mks)

18. Uses of Openings on garments
    • To allow putting on
    • To allow taking off
    • Decorations
    • Provide style features 2 x 1   (2mks)

19. Forms in which laundry soap is found:-
    • Soap bar
    • Soap powder
    • Soap flakes
    • Liquid soap
    • Gel soap         any 4 x ½  (2mks)

20. Advantages of using soft water for laundry:-
    • Does not form scum
    • Less soap needed, thus economical
    • Items washed in soft water feel softer to the touch  (2 x 1  =  2mks)

SECTION B

21.  
    1. Cleaning a neglected brass ornament
       • Collect the items required
       • Cover/ protect working surface
       • Dust the ornament inside and out to remove loose dirt.
       • Shake the brass tin thoroughly to mix well
       • Using a clean cloth, apply brasso sparingly on the ornament inside and out.
       • Leave for a few minutes to react
       • Use clean side of the cloth to rub till brasso is removed.
       • Rub using a clean rug folded into a pas to make it shine.
       • Clean used items , dry, store   (6mks)
    2. Weekly- cleaning a hurricane lamp
       • Collect all required item to save time and energy
       • Protect working surface.
       • Remove all moveable parts and empty the oil.
       • Clean the glass in warm soapy water and a soft cloth / sponge carefully.
       • Rinse the galss in cold water
       • Leave to dry completely , well protected.
       • Clean the metal chimney inside out to remove soot and stains
       • Clean the vent holes using a brush to remove soot
       • Dry all parts completely
       • Return the glass and refill the oil tank ready for use.
       • Trim the wick evenly and test if it is working well.
       • Clean equip used, dry & store. (8mks)
    3. Laundering white cotton table- cloth
       • collect items required
       • Remove the stain
       • Soak the table cloth in lukewarm  H₂O shortly to soften starch.
       • Use hot soapy water, friction washing
       • Rinse thoughly in hot water to remove dirt and soap.
       • Wring out the water
       • Use 1 :  6  strength cold or hot water starch to stiffen.
       • Dry in the sun, along with warp, straight on the line using pegs.
       • Iron hot w.s. then r.s.
         Air, fold & store.
       •  Wash used eq. dry & store.  (8mks)

SECTION C

22.  
    1. Reasons for finishing plain wooden surfaces
       • To create harmony with existing surfaces
       • To prevent wood from absorbing moisture
       • Keeps away pests
       • Cover cracks or rough surfaces
       • Make surfaces smooth for easy cleaning
       • Cover ugly marks 5 x  1  =  (5mks)
    2. Practices that are harmful to woolen articles
       • Sudden change in temperature – felting and shrinking.
       • Hanging causes stretching
       • Drying in the sun causes areas to stretch.
       • Pressing my flatten the design                      5  x 1   =   ( 5mks)
    3. Activities at the Ante-natal clinic
       • Her blood pressure is checked every visit
       • sugar and protein levels are checked
       • Blood iron is checked
       • Her weight is checked
       • Blood group and hemoglobin levels are established.
       • If ill, she is treated.
       • Advised on diet and exercise.                               5 x 1     ( 5mks)
    4. Qualities of a good waistband:-
       • The width is even all around
       • The band is flat and firm
       • Stitches made are strong , firm and neat.
       • Fits comfortably around the waist of the wearer.
       • The interfacing lies flat inside the waistband.
       • Flat on R.S & W.s                                       ( 5 x  1 )=  (5mks)

23.  
    1. Differences between cotton and polyester fabrics.
       • Cotton is resistant to high temps, while polyester is not
       • Cotton is absorbent while polyester is not.
       • Cotton does not generate static elec. While polyester does.
       • Cotton shrinks with the  1^st washing polyester does not.
       • Cotton is not resistant to mildew while polyester is.
       • Cotton lacks luster, polyester has.
       • Cotton burns readily to flame, polyester melts slowly .
       • Cotton is easily destroyed by strong acid while polyester resists weak acids.
       • Cotton is a natural fibre whereas polyester is artificial.
         Any 5 well done  x  2   =  (10mks)
    2. Kitchen floor
       • Should be resilient so that it is not tiring to stand on
       • shd. Deaden sound.
       • shd withstand grease
       • Sh d with stand heat
       • Should with stand frequent washing
       • Should contain pressure from heavy equip 5 x  1   =    5 mks)
    3. Purchasing labour saving equip
       • Good quality to last long.
       • Known brand whose spare parts can easily be obtained.
       • Easy to understand, operate & maintain.
       • shd. Not be noisy when in use.
       • Shd have operations manual for ease of reference.
       • size should suit the areas to be cleaned.                                     5 x  1   =  (5mks)
24.  
    1. Remedies of Needle breaking
       • Use of straight needles.
       • Remove pins tension
       • Tighten the pressure foot b4 maching
       • Use the correct foot for zig zag stitching
       • Fix needle in place firmly
       • Use the correct size of neele.
       • Use the right needle for the work     ( 5 x 1 =   5 mks)
    2.  Disadvantages of convenience foods
       • Have a lot of additives.
       • More nutritive value is inferior to corresponding fresh foods   -   vits  destroyed.
       • Flavours are often inferior to those of fresh foods.
       • Easily cause food poisoning.
       • Likely to be contaminated during processing and packing.             
         Well explained  .   5  x   1   =   (5mks)
    3. Modern methods of food preservations
       • Solar / sun and Mechanical drying. Dehydration and improvised drying & smoking.
       • Salting – meats, pork and fish.
       • Use of vinegar – onions, green mangoes, cucumber, beetroot etc.
       • Use of sugar – fruits
       • Use of heat
       • Bottling and canning
       • Cooling – use low temperature -  Milk
       • Beet – freezing – well packed or wrapped before being frozen.
    4. Making of  a French seam.
       • Put the two pcs. Of dress together with w.s. facing , R.S uppermost.
       • Pin and tack, matching raw edges and fitting lines, 6mm above the F.L.
       • Machine along the tacking, finish off threads ends and remove tacking.
       • Trip turnings to 3mm and press open.
       • Turn the work to w.s. & knife edges.
       • With the R.S together, pin and tack along the F.L. enclosing raw edges completely.
       • Remove tacking and press the seam over towards the back of the garment.
         Well explained             ½ x  5
         Relevant diagrams       ½ x 5                  ( 5mks)