Your CPD: Questions - pressure drops and pipe fittings
1. What typical percentage is used as a rule of thumb for fittings to allow for pressure drop?
2. What other method can be used to allow for frictional losses?
a Added Pascals method
b Equivalent lengths method
c Equivalent Pascals method
d Added lengths method
3. Where would you use a zeta value?
a Calculating hydraulic resistance of fittings
b Calculating the volume of a heating system
c Calculating the pressure of an expansion vessel
d Calculating the hydraulic resistance of a feed and expansion cistern
4. With which of the following do we measure resistance to flow? (Choose 2)
c Metres head per metre
5. The formula for calculating velocity through a pipe at a given flow rate is?
a V = Q / A
b V = Q x A
c Q = A x V
d Q = A / V
6. Using the nomograph below, what is the pressure drop of an elbow with a zeta value of 0.5 and a flow velocity of 1.0m/s?
a 220 Pa
b 230 Pa
c 240 Pa
d 250 Pa
Answer the above questions and send your answers, along with your name, membership number and email address, to:
CPD Assessment, CIPHE
64 Station Lane
or visit the members-only area of the CIPHE website: