Question 1:

(a) Describe the three main types of electrical fault which might occur in a circuit.
(b) What is three phase electric power? Give its advantages.
(c) Explain the possible causes and effects of an electric shock on a human body.

Question 2:

(a) Explain the basic internal plumbing system of a typical household.
(b) Describe the cooling system for refrigerator/ air conditioner.
(c) Explain the septic tank with the help of a diagram.

Question 3:

(a) Describe five types of maintenance.
(b) Explain the procedure for acid wash.
(c) How can you make a simple battery using potato?

Question 4:

(a) Describe the basic parts of a real telephone.
(b) What is a Submersible Junction Box?
(c) How can low energy consumption be achieved for a house?