Journeyman Review Number Seven Flashcards
A heating/cooling tower has been sized to provide 24,000 BTUs on one floor and 12,000 BTUs on another how many tonnes of heating and cooling will the tower need to supply
3 tonnes
20 m of mild steel pipe installed at 17°C encounters a temperature rise of 50°C how much will the steel pipe expand?
12 millimetres
When testing petroleum fuelled oil piping, the supply return piping shall be tested
Together at the same pressure
A heating cooling system is found to have 32% glycol now requires 45% glycol. The volume of the system is 225 L approximately how much glycol needs to be added
40 L
Increase percentage of glycol times system volume - divided by percent of water
13 x 225- divided by 68% water = 40 liters
On a solar heating system, the PRV shall be located
at the system, Highpoint
A plumber has replaced the washers on a existing two handle faucet, the faucet still drips what is the next part to be replaced?
The faucet seat
Who provides the green triangle rating for steel toed boots?
CSA
What is required to control flow through a grease interceptor?
A flow control device on the inlet piping
The most common gases found in a confined space are
Carbon monoxide and H2S
What is the first thing to be done prior to entering a manhole?
Obtain a permit
What is the total feet ahead of a pump having 20 feet of suction head and 50 feet of discharge head
70 feet
What is the approximate discharge of a pump having 20 feet of suction head and 50psi discharge head?
115 feet
20 feet of suction head is not relevant in this question
Two boilers share a common supply and return what devices would be required for safe operation
Two low water, cutoffs, and one flow switch
A waterline enters a building having a geodetic elevation of 692 m with a pressure of 480 KPA what would be the pressure at 673 m
293 KPA
Which term is best used to describe a complete recirculation of swimming pool water
Rate of turnover
The circuit breaker tripped immediately after a pump starts what could be the possible cause?
A short circuit
Undersize wiring
Faulty circuit breaker
All of the above
All of the above
Which device is required on a domestic cold water system in a high-rise building with a booster pump
Check valve
When a water service pipe enters a building under the footing, what is the expected burial depth?
300 mm
A piping system has an offset of 13 inches in an advance of 22 inches what it will be the end to end measurement of the travel by using the following information
Fitting allowance is equal to 1 3/16 of an inch
Weld gap equals 1/8 inch
22- 15/16”
Water feed to a boiler has low pH what may be added to the water to raise the pH
Soda ash
What is the required “air gap” of a half inch domestic waterline
25 mm and two pipe diameters