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Sca 101: Safety Methods In The Laboratory Question Paper

Sca 101: Safety Methods In The Laboratory

Course:Bachelor Of Education Science

Institution: University Of Nairobi question papers

Exam Year:2016

UNIVERSITY OF NAIROBI
FIRST YEAR EXAMINATIONS FOR THE DEGREE OF BACHELOR OF EDUCATION (SCIENCE)
SCA 101: SAFTEY METHODS IN THE LABORATORY
DATE: DECEMBER 16,2016 TIME:9.00-11.00 A.M

INSTRUCTIONS : ANSWER ALL QUESTIONS
1. (a) Define the following terms. (6 marks)
(i)Lethal concentration and time (Lct 50)
(ii)Time-weighted Average (TWA)
(iii)Flash point
(iv)Fire tetrahedron
(v)Hydrants
(vi)Extinguishers Rating
(b)List the significances of inventory management (4 marks)

(c)Differentiate between the following terms

(i)Detonation and deflaglaration (3 marks)
(ii)Wet and dry pipe sprinkler systems (2 marks)
(iii)Synergistic and antagonistic chemical combination (3 marks)

(d)List the recommendation laboratory procedures that should be
Observed when dealing with flammable gases or liquids. (3 marks)

2 (a) Explain the working principle behind the following equipment
(i)Photoelectric detectors (3 marks)
(ii)Heat detectors (2 marks)
(iii)Rate-of-rise detectors (2 marks)

(b) Identify the hazards associated with equipment below and for each
Provide precautons to be observed.
(i)UV wavelength lamps (3 marks)
(ii) Sand baths (3 marks)

(c)Water mists extinguishers are ideal for class A fires where potential
For class c exists.Explain why,give examples where they can
Be used. (3 marks)

(d)What advantages does pressurized ABC dry chemical extinguisher
have over CO2 Extinguisher? (2 marks)
(e) Discuss the importance of fire drills (4 marks)

3 (a)Discuss the risk assessment and analysis for the following:
(i)Perchloric acid (3 marks)
(ii)Mercury vapor (3 marks)
(iii) Organic solvents (3 marks)
(b)List ways in which noise hazard can be controlled (3 marks)

(c) Explain the first aid procedures for:
(i) Alkali burn (2 marks)
(ii)fainting/shock (3 marks)
(iii) thermal burn (3 marks)

4 (a) list the steps one should follow for evacuation upon the activation of a fire alarm
System (6 MARKS)
(b) Give three ways in which waste minimization in laboratory can be effected.
(3 marks)

Sca 101: Safety Methods In The Laboratory Question Paper

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