31. Which of the following factors influences the availability of some nutrients in the soil?
A. soil depth
B. soil colour
C. soil consistency
D. soil pH
A
32. Asbestos suits are used by fire fighters because they are
I. heat-resistant
II. non-combustible
III. Poor conductors
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
D
33. A poultry stockman tests his eggs at the beginning of the incubation period in order to
A. eliminate infertile eggs
B. know the stage of development of the embryo
C. eliminate eggs that are underweight
D. eliminate eggs that will not hatch in time
C
34. In Ghana, laws and regulations which prohibit abuse of the environment include
A. legislation on land tensure
B. legislation on soil conservation
C. convention on the ozone layer
D. laws on bush fires
D
35. Ventilation is essential in the construction of houses because it
A. creates conditions that favour the growth of fungi
B. allows cool air to circulate in the room
C. replaces humid stagnant air with dry air
D. allows bad odour in the room to escape
B
36. The addition of lime (CaOH)2 in the water treatment process is to
A. kill bacteria and other micro-organisms
B. aid sedimentation of suspended particles
C. adjust the pH of the water and partially remove hardness
D. ensure effective filtration of raw water.
C
37. Which of the following ingredients are sources of protein for poultry?
A. soya bean cake and cassava meal
B. blood meal and soya bean cake
C. cassava meal and blood meal
D. wheat bran and fish meal
B
38. The importance of a fuse in an electric circuit is to
A. provide protection against electric shock
B. protect electrical appliances from being damaged
C. control electrical leakage
D. protects the house from thunder and lightning
B
39. A brooder covering 15 m2 can accommodate 100 chicks. How many chicks can be kept comfortably in a brooder of area 3000 m2?
A. 300
B. 450
C. 20,000
D. 31,5000
C
40. Which of the following processes make use of the beneficial effects of microbes?
I. baking of bread
II. manufacture of antibiotics
III. brewing of beer
A. I and II only
B. I and III only
C. II and III only
D. I,II and III
D
41. Determine the relative molecular mass of Ca(OH)2+ [H=1.0, O=16, Ca=40.0]
A. 42
B. 57
C. 74
D. 87
C
42. A reflex action
A. can be controlled
B. depends on previous experience
C. depends on memory
D. is spontaneous
D
43. Which of the following statements is correct?
A. light travels faster in water than in air
B. sound travels faster in air than in wood
C. sound waves are longitudinal waves
D. light waves are elastic waves
C
44. During a hot day, the receptors in human skin cause
A. dilation of superficial blood vessels
B. constriction of superficial blood vessels
C. lowering of hairs on the skin
D. a decrease in metabolic rate
A
45. A system of levers has velocity ratio of 5. If an effort of 10 N overcomes a load of 40 N, what would be the efficiency of the system?
A. 25%
B. 60%
C. 80%
D. 100%
C
46. The phenotypic ratio of selfing the offspring of a cross between homozygous tall and homozygous short orange plants is
A. 1:1
B. 3:1
C. 1:2:1
D. 1:1:2
B
47. A clinical thermometer is not sterilized in boiling water because
A. a vector may contaminate it
B. it has a narrow bore
C. water has lower boiling point
D. it has short range of temperature
D
48. The eradication of malaria is proving almost impossible in the tropics because of the
A. wide area of breading grounds for the vector
B. ineffectiveness of insecticides in use against the vector
C. absence of natural enemies of the vector
D. presence of thick cuticle that protects the parasite
A
49. The point in an object where all the forces acting on its particles pass is the object's
A. centre of curvature
B. centre of gravity
C. centre of mass
D. midpoint
B
50. Which of the following chemical formulae represents Lead (II) oxide?
A. Pb2O
B. PbO
C. PbO2
D. Pb2O4
B
51. A block and tackle system has five fixed pulleys and four moving ones. What is the velocity ratio of the system?
A. 1
B. 4
C. 5
D. 9
D
52. The pituitary gland is referred as the master gland because
A. it secretes a lot of hormones
B. it secretes growth hormones
C. it controls the other members of the endocrine system
D. its hormones may cause giantism
C
53. A body moves with a velocity of 30.0 ms−1. If the speed is increased to 40.0 ms−1 in 4.0 s, calculate the average acceleration of the body.
A. 2.5 m−2
B. 4.4 ms−2
C. 8.8 ms−2
D. 17.5 ms−2
A
54. Which of the following substances can cause temporary hardness of water?
A. calcium hydrogen trioxocarbonate (IV)
B. calcium trioxocarbonate (IV)
C. potassium trioxocarbonate (IV)
D. sodium trioxocarbonate (IV)
A
55. Which of the following pests bores through grains?
A. aphids
B. army worms
C. mealy-bugs
D. weevils
D
56. If 4.52 × 105 J of heat energy was used to vapourize 200.0g of boiling water, calculate of the specific heat of vaporization of water
A. 2.26 × 105 J kg−1
B. 2.26 × 106 J kg−1
C. 22.6 × 106 J kg−1
D. 226 × 106 J kg−1
B
57. Which of the following is not associated with a classification system?
A. Aristotle
B. Linnaeus
C. Mendel
D. Mendeleev
C
58. Which of the following methods cannot be used to protect iron against rust?
A. enamelling
B. galvanizing
C. painting
D. riveting
D
59. One advantage steel has over iron in construction is that it is
A. ductile
B. malleable
C. elastic
D. shiny
B
60. The S.I. unit of the moment of a force is
A. kg/m
B. kg m/s
C. N/m
D. N m
D
