Refrigerated Machine Operate Practice
Exam Questions with Latest Update
What is a jurisdiction? - Answer-Each province and territory is its own jurisdiction
Explain the intent of the regulation's governing the operation of boilers and pressure
equipment? - Answer-To give the director or administrator of the department or branch
or government a means of evolving, within the framework of the intent of the act, to
meet changes in technology, concept, and the use of those variables listed within the
scope of the act.
Is it more difficult to change an act or a regulation? - Answer-The main or primary
document is an "act" which must be passed through the jurisdictional legislature. The
act then has "regulations" which are pursuant to the enforcement of the act. These
regulations are usually under the governance of an official of the government rather
than the actual legislature. As a result, it is much easier to have changes made to a
regulation than it is to have changes made to an act.
What jurisdictional item or legislation is most important to a person interning time make
power engineering a career choice? - Answer-Power engineers acts and regulations
What two Canadian national codes have been adopted by all jurisdictions - Answer-
CSA B51 and CSA B52
List some of the penalties which may be applied to the holder of a certificate of
competency - Answer-The regulation will also refer to penalties which may be listed in
the pertinent jurisdictional act. These can be fines, certificate suspensions, certificate
cancellations, imprisonment.
List types of pressure vessels discussed in the CSA B51 section entitled "pressure
vessels" - Answer-Blowoff vessels, hot water tanks, hydropneumatic tanks, and cushion
tanks
Explain the two purposes of the CSA B52 code - Answer-To provide for the safe design,
construction, installation, operation, and repair of refrigerating and air conditioning
equipment and systems, and related equipment. To promote uniform requirements
among the provinces and territories.
Describe the purpose of ASME Section VI - recommended rules for the care and
operation of heating boilers and explain how this purpose is achieved. - Answer-This
code contains rules that have been compiled to assist operators of heating boilers in
maintaining their plants in as safe a condition as possible. These rules apply to the
boiler proper and to pipe connections up to and including the value of valves required by
,the ASME code. Rules are also given covering auxiliary equipment in so far as safety is
concerned
What recommended procedures are covered in ASME Section VI - recommended rules
for the care and operation of heating boilers pertaining to the treatment of water in
steam and hot water heating boilers? - Answer-These recommended procedures cover
the treatment of water in steam and hot water boilers. They cover boiler water troubles,
chemicals used, function of chemicals, treatment alternatives, blowdown, feeders, and
procedures
Which of the following items are covered in the appendix or the ASME Boiler and
Pressure Vessel Code, Section IV - Heating Boilers?
a) approval of new materials under code
b) porosity charts for weld radiography
c) manufacturer's data report forms and guides
d) all of the above - Answer-D
Which of the ASME codes deal with some conditions which are not encountered in
Section I - Power Boilers?
a) section VI
b) section IV
c) section VII
d) CSA B51 - Answer-C
The amount of heat required to raise the temperature of a unit mass if a substance 1
degree Celsius without changing the state of the substance is defined as
a) sensible heat
b) specific heat
c) superheat
d) saturated - Answer-B
_________ heat causes a change in the temperature of a substance without changing
its state
a) sensible
b) specific
c) superheat
d) saturated - Answer-A
The first law of thermodynamics states that heat and work are
a) incompatible
b) unconvertible
c) mutually convertible
d) the same process - Answer-C
The second law of thermodynamics states that if it is required to transfer heat from a
cold substance to a hotter substance, then _______ must be supplied
, a) pressure
b) external heat
c) external work
d) R134-a - Answer-C
A bimetal thermometer consists of
a) a filament that is compared to the object being measured
b) two dissimilar metals rigidly fixed together
c) two dissimilar wires connected to a battery
d) two copper wires connected together - Answer-B
A 3 n copper bar is heated from 25'C to 175'C. After heating it increases in length by
1.45 mm. What is the coefficient of linear expansion?
a) 0.0000032/'C
b) 0.0000256/'c
c) 0.0000012/'C
d) 0.0000025/'C - Answer-A {delta length = length original * coefficient * delta
temperature}
Heat, whose application causes a ride in temperature, is called _____ - Answer-
Sensible heat
The rate at which a system will remove heat from the refrigerated medium is defined as
____ - Answer-Refrigeration capacity or net refrigeration effect
One tonne or refrigeration is defined as
a) 13958 KJ per day
b) 100 KJ per minute
c) 233 kJ per minute
d) 13958 J per hour
e) 335 J per second - Answer-C
If chilled water at 2'C circulates through an evaporator and then is used in a cooling coil
to cool an air duct, you would expect the evaporator temperature to be
a) less than 2'C
b) at 2'C
c) slightly higher than 2'C
d) much higher than 2'C
e) unknown - Answer-A
The temperature at which a liquid refrigerant evaporates is dependent on the _____ -
Answer-Temperature and pressure of the refrigerant in the evaporator
Latent heat may be defined further with respect to the states or the substance changing
phase. Name the type of latent heat required to change ice from a solid state to a liquid
state or from a liquid state to a solid state. - Answer-Fusion
Exam Questions with Latest Update
What is a jurisdiction? - Answer-Each province and territory is its own jurisdiction
Explain the intent of the regulation's governing the operation of boilers and pressure
equipment? - Answer-To give the director or administrator of the department or branch
or government a means of evolving, within the framework of the intent of the act, to
meet changes in technology, concept, and the use of those variables listed within the
scope of the act.
Is it more difficult to change an act or a regulation? - Answer-The main or primary
document is an "act" which must be passed through the jurisdictional legislature. The
act then has "regulations" which are pursuant to the enforcement of the act. These
regulations are usually under the governance of an official of the government rather
than the actual legislature. As a result, it is much easier to have changes made to a
regulation than it is to have changes made to an act.
What jurisdictional item or legislation is most important to a person interning time make
power engineering a career choice? - Answer-Power engineers acts and regulations
What two Canadian national codes have been adopted by all jurisdictions - Answer-
CSA B51 and CSA B52
List some of the penalties which may be applied to the holder of a certificate of
competency - Answer-The regulation will also refer to penalties which may be listed in
the pertinent jurisdictional act. These can be fines, certificate suspensions, certificate
cancellations, imprisonment.
List types of pressure vessels discussed in the CSA B51 section entitled "pressure
vessels" - Answer-Blowoff vessels, hot water tanks, hydropneumatic tanks, and cushion
tanks
Explain the two purposes of the CSA B52 code - Answer-To provide for the safe design,
construction, installation, operation, and repair of refrigerating and air conditioning
equipment and systems, and related equipment. To promote uniform requirements
among the provinces and territories.
Describe the purpose of ASME Section VI - recommended rules for the care and
operation of heating boilers and explain how this purpose is achieved. - Answer-This
code contains rules that have been compiled to assist operators of heating boilers in
maintaining their plants in as safe a condition as possible. These rules apply to the
boiler proper and to pipe connections up to and including the value of valves required by
,the ASME code. Rules are also given covering auxiliary equipment in so far as safety is
concerned
What recommended procedures are covered in ASME Section VI - recommended rules
for the care and operation of heating boilers pertaining to the treatment of water in
steam and hot water heating boilers? - Answer-These recommended procedures cover
the treatment of water in steam and hot water boilers. They cover boiler water troubles,
chemicals used, function of chemicals, treatment alternatives, blowdown, feeders, and
procedures
Which of the following items are covered in the appendix or the ASME Boiler and
Pressure Vessel Code, Section IV - Heating Boilers?
a) approval of new materials under code
b) porosity charts for weld radiography
c) manufacturer's data report forms and guides
d) all of the above - Answer-D
Which of the ASME codes deal with some conditions which are not encountered in
Section I - Power Boilers?
a) section VI
b) section IV
c) section VII
d) CSA B51 - Answer-C
The amount of heat required to raise the temperature of a unit mass if a substance 1
degree Celsius without changing the state of the substance is defined as
a) sensible heat
b) specific heat
c) superheat
d) saturated - Answer-B
_________ heat causes a change in the temperature of a substance without changing
its state
a) sensible
b) specific
c) superheat
d) saturated - Answer-A
The first law of thermodynamics states that heat and work are
a) incompatible
b) unconvertible
c) mutually convertible
d) the same process - Answer-C
The second law of thermodynamics states that if it is required to transfer heat from a
cold substance to a hotter substance, then _______ must be supplied
, a) pressure
b) external heat
c) external work
d) R134-a - Answer-C
A bimetal thermometer consists of
a) a filament that is compared to the object being measured
b) two dissimilar metals rigidly fixed together
c) two dissimilar wires connected to a battery
d) two copper wires connected together - Answer-B
A 3 n copper bar is heated from 25'C to 175'C. After heating it increases in length by
1.45 mm. What is the coefficient of linear expansion?
a) 0.0000032/'C
b) 0.0000256/'c
c) 0.0000012/'C
d) 0.0000025/'C - Answer-A {delta length = length original * coefficient * delta
temperature}
Heat, whose application causes a ride in temperature, is called _____ - Answer-
Sensible heat
The rate at which a system will remove heat from the refrigerated medium is defined as
____ - Answer-Refrigeration capacity or net refrigeration effect
One tonne or refrigeration is defined as
a) 13958 KJ per day
b) 100 KJ per minute
c) 233 kJ per minute
d) 13958 J per hour
e) 335 J per second - Answer-C
If chilled water at 2'C circulates through an evaporator and then is used in a cooling coil
to cool an air duct, you would expect the evaporator temperature to be
a) less than 2'C
b) at 2'C
c) slightly higher than 2'C
d) much higher than 2'C
e) unknown - Answer-A
The temperature at which a liquid refrigerant evaporates is dependent on the _____ -
Answer-Temperature and pressure of the refrigerant in the evaporator
Latent heat may be defined further with respect to the states or the substance changing
phase. Name the type of latent heat required to change ice from a solid state to a liquid
state or from a liquid state to a solid state. - Answer-Fusion
