Specifications

117
QUESTIONS
Part - A
Choose the Correct Answer (1 Mark)
1. The type of heater used to heat the water contained in a plastic bucket is
A) electric kettle B) immersion water heater
C) storage water heater D) Any type
2. The heating time of water in Saucepan type electric kettle is more than Swan neck type
because
A) the size of kettle is big B) quantity of water is large
C) heating element is not in direct contact with water
D) heating element is larger is size
3) To avoid direct touching of heating element to the wall of the kettle body in Ring type, the
heating element is coated with
A) nichrome B) magnesium oxide C) chromium oxide D) lead oxide
4) A sacrificial anode rod, in storage water heater, is used to prevent the steel tank from
A) leaking B) corroding C) over heating D) exploding
5) When hot water is required at more than one service point at any time, the type of water
heater used is
A) immersion water heater B) non-pressure type storage water heater
C) pressure type storage water heater D) any kind of storage water heater
Part - B
Answer the following questions in one or two words (1 Mark)
1. Having hot shower is ruled out while using immersion water heaters. Say TRUE or FALSE.
2. Name the material filled in the space between the tanks in storage water heaters to prevent
heat transfer from inner tank to outer tank.
3. What type of heater is preferred for multi storied building?
4. What is the use of a pressure relief valve in storage water heater?
5. What is coffee percolator?
Part - C
Answer the following questions briefly (4 Marks)
1. Compare the Merits and Demerits of Swan Neck type Saucepan type electric kettle.
2. State the drawbacks of immersion water heater.
3. List the precautions to be followed while using immersion water heater.
4. Write the parts of storage water heaters. State its functions also.
5. What is function of coffee maker? State its various types.
Part - D
Answer the following questions in two page level (20 Marks)
1. Explain the construction and working of Non-pressure type storage water heater. State its
area of application.
2. Explain the construction and working of pressure type storage water heater. State its area
of application