3.1 Identify the water trap above - NSC Civil Technology Civil Services - Question 3 - 2017 - Paper 1
Question 3
3.1 Identify the water trap above.
3.1.2 Explain the purpose of a water trap.
3.2 State TWO factors that determine the temperature of the water in a solar heate... show full transcript
Worked Solution & Example Answer:3.1 Identify the water trap above - NSC Civil Technology Civil Services - Question 3 - 2017 - Paper 1
Step 1
Identify the water trap above.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The water trap depicted in FIGURE 3.1 is an 'S-trap'.
Step 2
Explain the purpose of a water trap.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The purpose of a water trap is to prevent sewer gas (foul air) from entering the building by retaining some water in the trap.
Step 3
State TWO factors that determine the temperature of the water in a solar heater.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The season/Cloud cover/weather conditions
Duration of sunshine
Step 4
Name the part in an electric geyser that is used to warm up water.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The electric element or heating element is used to warm up water in an electric geyser.
Step 5
Explain why the cold water inlet is mounted at the bottom of the geyser and the hot water outlet is mounted at the top of the geyser.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The cold water inlet is at the bottom to ensure that the incoming cold water does not mix with the already heated water. This arrangement allows the hot water, which is less dense, to rise to the top and be available for use.
Step 6
Name the component that is installed for safety purposes to prevent the geyser from bursting when the water becomes too hot.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The safety valve is the component installed to prevent the geyser from bursting when the water becomes too hot.
Step 7
Explain the function of the grid.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The grid receives and drains storm water, allowing it to enter storm water systems, by guiding water off the roads into storm water pipes.
Step 8
State ONE consequence if the grid is blocked.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
If the grid is blocked, roads may overflow with storm water, potentially causing damage to the roads.
Step 9
Name TWO mechanical methods that may be used to obtain water from a borehole.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Wind pump
Submersible water pump
Step 10
Fluorescent light at A.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a fluorescent light at position A in the kitchen.
Step 11
Distribution board at B.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a distribution board at position B.
Step 12
Double-pole one-way light switch at C.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a double-pole one-way light switch at position C.
Step 13
Electrical wiring from C to A.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the electrical wiring connecting point C to point A.
Step 14
Rodding eye.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a rodding eye according to the standard regulation.
Step 15
Gully.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a gully.
Step 16
Ventilation pipe.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbol for a ventilation pipe.
Step 17
Branch pipes.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbols for two branch pipes at the correct positions.
Step 18
Inspection eyes.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Draw the symbols for inspection eyes according to regulations.
Step 19
Abbreviations for sewerage components.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Provide any three appropriate abbreviations for sewerage components used in plumbing.
