5TH Class Power Engineering
Provincial Exam Study Guide
Which of the following does not meet the definition of a heating
plant?
A plant which has a capacity not exceed 750kw or 0.085 m3 and in
which steam or other vapor may be generated at a pressure not
exceeding 103kPa and a temperature of 100 degrees Celsius
Two important codes which have been adopted by all Canadian
jurisdictions and which are of importance to the Fifth Class Power
Engineer are the
CSA B51 and CSA B52
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The letters CRN stand for
Canadian registration number
When a power engineers certificate is required to be posted in more
than one heating plant the engineer should
,keep the certificate in the owners office and place photocopies in
the plants
in the power engineers regulation, means any part of a boiler that is
in contact with liquid under pressure on one side and the products
of combustion on the other side
heating surface
Which of these following fittings must be installed on a low pressure
steam heating boiler?
pressure gauge
Sensible heat refers to the type of heat that, when absorbed or
removed from a substance, results in a change in temperature that
can be detected by a thermometer, but not a change in phase.
sensible heat
The boiling temperature of a liquid
will change if its pressure changes
heat passes through the metal of heating surfaces by
conduction
as air cools, it becomes heavier, falls towards the floor and is
replaced by warmer air which in turn gives up heat. In this currents
are set up and heat is transferred
convection
of the following materials, that which would be classified as a class
b fire is
gasoline
Extinguishers used for a Class C fire are identified by a circle
containing the letter 'C' with a background color of:
blue
An example of a confined space would be
a trench
an understanding of the reactions of a fire forms the basis for the
knowledge necessary to extinguish a fire
chemical
, one method of stopping a fire is by
removing or cutting off the fuel supply
a class b fire would involve
gasoline or oil
a fire breaks out in an oil storage tank. This is called a class fire
B
a class c fire would involve
electrical equipment
class c fires are best extinguished with
C02
of the following materials, that which would be used to put out a
class a fire is
water
regarding building safety a major day to day priority is
good housekeeping practices
the use of a workplace label on a container in a workplace with a
controlled product moved from its original container is primarily the
responsibility of the
employer
when flame cutting, a blast of pure oxygen is directed into heated
metal to
burn away a portion of the metal
arc welding requires
low voltage and high amperage
A rectifier used in arc welding
will change AC to DC
a welding electrode stamped E 7018 will have a tensile strength of
482650 kPa which is equal to 70000 psi
the oldest form of welding is
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