Class 9 Skill Education Rooftop Gardening MCQ

Class 9 Skill Education Rooftop Gardening MCQ

MCQ:

  1. Recommended sunlight? a)1–2h b)3–4h c)5–6h d)10–12h
  2. Potting mix ratio? a)2:1:1 b)1:1:1 c)1:2:3 d)3:1:1
  3. Ideal pH? a)3–4 b)5–5.5 c)6.5–7 d)8.5–9.5
  4. WHC formula? a)(D−W)/W×100 b)(W−D)/D×100 c)W/D×100 d)D/W×100
  5. Lightweight, flexible container? a)Cement b)Stone c)Grow bag d)Metal
  6. BoM helps to: a)identify pests b)measure sunlight c)estimate cost & organise materials d)calculate pH

Fill in the blanks:
7. Rooftop gardening is useful where open land is ________.
8. Target pH is –.
9. Germination is checked after ________ weeks.
10. Unwanted plants are called ________.
11. Excess water may cause root ________.

True/False:
12. Cement pots are lightweight.
13. Proper drainage prevents waterlogging/seepage.
14. Rooftop plants need wind protection.
15. Delayed harvesting can reduce quality/shelf life.

Match:
16. Hand trowel — a)Cutting stems b)Digging/planting c)Lightweight/flexible d)Shade
17. Pruning scissors — a)Cutting stems b)Digging/planting c)Lightweight/flexible d)Shade
18. Grow bag — a)Cutting stems b)Digging/planting c)Lightweight/flexible d)Shade
19. Shade net — a)Cutting stems b)Digging/planting c)Lightweight/flexible d)Shade

Very Short:
20. Define rooftop gardening.
21. Name any 2 rooftop layout factors.
22. Define WHC.
23. Why are trays placed under pots?

Numerical/Application:
24. Area = 10 m², safe load = 150 kg/m². Find permissible load.
25. Dry mix = 200 kg, WHC = 25%. Find approximate water requirement.
26. 80 seeds planted, 64 germinated. Find germination %.

Assertion–Reason:
27. A: Potting mix is preferred for rooftop containers. R: It can be lighter, more aerated and better drained.
28. A: Excess watering can harm plants. R: It may cause root suffocation and waterlogging.

ANSWERS

MCQ: 1-c, 2-b, 3-c, 4-b, 5-c, 6-c

Fill: 7. limited 8. 6.5–7.0 9. 2–3 10. weeds 11. suffocation

T/F: 12-F, 13-T, 14-T, 15-T

Match: 16-b, 17-a, 18-c, 19-d

Very Short:
20. Growing plants on rooftops using pots, grow bags or prepared beds.
21. Any 2: space, sunlight, structural safety, water, shade, wind.
22. Maximum water the potting mix can hold.
23. To collect excess water and prevent roof seepage.

Numerical:
24. 1,500 kg
25. 50 L
26. 80%

Assertion–Reason:
27. Both true; R correctly explains A.
28. Both true; R correctly explains A.