TMA4/SED324

TMA Quiz Questions TMA: TMA4/SED324 Matric Number: SCORE=8.00 SED324 - School Science Laboratory Mr Ejembi John E. (jejembi@noun.edu.ng ) 1 Flammable substances are usually           marked with yellow colour Blue colour red colour orange colour 2 Gases can be divided into 3 sub-classes on the basis of their hazardous nature.as follows except: flammable gases toxic gases non flammable, non toxic gases volatile gases 3 To ensure safety in handling chemicals, the labels must show the name of the substance an indication of the general nature of the risk a risk phrase all the above 4 In considering the Human Body and Electricity, the more wet the body is: the greater the resistance to electricity the lower the resistance to electricity the more there is no effect of electricity None of the above 5 The colour codes of the ‘earth “that should be followed while wiring a plug is Green and Yellow Dark Brown Light Blue yellow 6 The colour codes of the ‘neutral “ that should be followed while wiring a plug is Green and Yellow Dark Brown Light Blue yellow 7 Common causes of danger encountered in the biology laboratory could be sharps e.g. razors, glasses toxicants or toxic substance laboratory animals and their carcasses and bedding all the above 8 The three main factors necessary for fire outbreak are the following except: heat hydrogen Fuel oxygen 9 Most fire extinguisher act by excluding the oxygen supply from the fire temperature hydrogen supply from the fire temperature carbon dioxide supply from the fire temperature heat supply from the fire temperature 10 Most likely causes of igniting fire in the laboratory is: Hazardous materials and reactions Compressed and liquefied gasses Flammable substance all the above 11 Fires involving flammable liquids e.g. petrol, oil, alcohol cannot be put off by fire blankets sand water carbon Dioxide 12 All the classes of fire can be put off by the following except dry sand fire blanket dry powder water 13 With the water extinguisher, attack the fire which is spreading horizontally from the lowest point and move upward vertically from the lowest point and move upward vertically from the lowest point and move downward horizontally from the lowest point and move downward 14 Principles to be obeyed in Fire Fighting include the following except: Always take a position between the fire and the exit so that your escape route cannot be cut off Fire extinguishers should be placed closed to the teachers table Use your extinguisher for small fires Use your extinguisher as a first aid fire fighting measure only 15 Three important human resources in the management of the science laboratory are the following except head of department laboratory technician /assistants students science teacher 16 The science teacher is responsible for the following except Preparation of materials, solutions and specimens training of the laboratory assistants delegation of duty to other staff members Proper storage and distribution of materials 17 For prevention of Corrosion and Rust on materials and equipments, the laboratory should: have efficient ventilation system Wipe equipment after use to remove liquid and chemical dust Cover equipment or store them in cupboards all the above 18 A well trained laboratory assistant is. a valuable asset to the science laboratory on the same salary scale with the laboratory technician superior to the Laboratory technician all the above 19 The laboratory assistant ant technicians should be recruited by principal and head of department science teachers and head of department science teachers alone head of department alone 20 A well arranged science room should be characterized by orderly arrangement for materials simple display of charts, kits etc trends in the use of materials and replacements all the above