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CPD Programme
Name (please print)..................................................................................
Module 7
Job title........................................................................................................
August 2009
_________________________________________
Organisation..............................................................................................
1. The appropriate calculation to determine the specific volume
of air is:
Address.......................................................................................................
A 273·T ⁄ (p
at
– p
v
)
.....................................................................................................................
B 287·T ⁄ (p
a
– p
v
)
C 287·T ⁄ (p
s
– p
v
)
.....................................................................................................................
D 273·T ⁄ (p
at
– p
s
)
E 287·T ⁄ (p
at
– p
v
)
Postcode.....................................................................................................
2. What is the value of standard atmospheric pressure? Email ...........................................................................................................
A 1 bar
Are you a member of:
B 1.01325 mbar
C 101.325 Pa
CIBSE
D 100 kPa
If so, please state your membership number
E 101.325 kPa
(if available)................................................................................................
3. The practical difference (for HVAC applications) between moist
air density and the inverse of specific volume is likely to be:
Other institution
A Less that 1%
B More than 5%
(please state)..............................................................................................
C No more than about 4%
D Always less than 3% To help us develop future CPD modules, please indicate your
E No more than about 10%
primary job activity:
4. Which of the following is least likely to be correct?
Building services engineer
Mechanical engineer
A Water vapour molecules have a lower molecular mass than
the principal constituents of dry air.
Electrical engineer
B Saturation vapour pressure is not dependant on the
Commissioning engineer
atmospheric pressure.
C Air with higher moisture content will have a higher density.
Energy manager
D Nitrogen and Oxygen have molecular masses of Facilities manager
approximately 28 and 32 respectively.
Other (please give details).................................................................
E Moisture content may be calculated knowing the dry air
partial pressure and the atmospheric pressure.
By entering your details above, you agree that CIBSE may contact you from time to time with
information about CPD and other training or professional development programmes, and
5. The accuracy a percentage saturation derived from readings
about membership of CIBSE if you are not currently a member.
taken from a typical sling psychrometer with 0.5°C gradations are
likely to have a minimum uncertainty of at least:
Please.go.to.www.cibsejournal.com/cpd.to.complete.this.
A +/- 0.4 percent saturation
questionnaire.online..You.will.receive.notification.by.email.of.
successful.completion,.which.can.then.be.used.to.validate.your.
B +/- 1 percent saturation
CPD.records.in.accordance.with.your.institution’s.guidance.
C +/- 1.5 percent saturation
D +/- 2.5 percent saturation
Alternatively,.you.can.fill.in.this.page.and.post.to:..
N Golledge, CIBSE, 222 Balham High Road, London, SW12 9BS
E +/- 10 percent saturation
52 CIBSE Journal August 2009 www.cibsejournal.com
CIBSEaug09 pp49-52 cpd.indd 52 7/23/09 4:06:54 PM
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