ABSA 5th Class
__________ heat is the amount of heat required to raise the temperature of a unit mass
of a substance 1 degree Celsius without changing the state of the substance. - ANS -
Specific
___________ are the building blocks of all matter. - ANS - atoms
____________ are required to prevent oil from spreading beyond the confines of a
heater in the event of a ruptured tube. - ANS - Dikes
A complete electrical circuit must be ______________________. - ANS - continuous
A disadvantage of using threads to join pipes and fittings is?: - ANS - the effective wall
thickness is reduced
A draft gauge on a furnace indicates the draft in: - ANS - mm of water column
A flushometer (flush valve) is: - ANS - a metering device.
A fuel storage tank must be located a minimum of ____ away from the furnace - ANS -
2 feet
A Ground Fault Circuit Interrupter (GFI) works on comparing __________ on different
sides of the circuit. - ANS - Current
A high limit control switch
a) is necessary on all boilers
b) activates after the safety valve opens
c) is a normally open switch
d) usually does not require manual resetting
e) must be used when a boiler is not under continuous supervision - ANS - E
A hot water circulation system which is difficult to balance due to the length of pipe
being different for each convector, is the ________ system - ANS - Two pipe direct
return
,A hot water circulation system which is self-balancing as a result of having all the
circuits the same length is the _________. - ANS - two-pipe reverse return
A manufacturers welding method must ___________________. - ANS - be qualified
under the applicable code
A method of backflow prevention which makes use of a separation between the free
flowing discharge of a potable water pipe and an open or non-pressure receiving vessel
is called __________ backflow prevention method. - ANS - air gap
A more modern method of ridding a boiler of dissolved solids is: - ANS - continuous
blowdown
A motor that has an extra winding in the stator to give added torque is called a: - ANS -
Split-phase motor
A PFD is ____________________. - ANS - A schematic of the process flow of a plant
(Process flow diagram)
A piping support device which allows axial movement of the pipe is the __________. -
ANS - adjustable roller stand
A potential hazard of working in a confined space entry may be where the work in
progress could cause: - ANS - equipment being used to become a hazard
A purpose of a liquid refrigerant control or regulating valve is: - ANS - Isolate the high
side from the low side.
A purpose of a steam trap is to: - ANS - automatically drain condensate from steam
lines
A refractory burner disadvantage is: - ANS - High initial cost
A smoke detector employing a short beam carried between the light source and
receiver, both mounted in a single ceiling-mounted unit, is called: - ANS - A spot type
photo-electric detector
A solenoid type fuel gas valve is held close by what? - ANS - Fuel pressure
, A substance, which will absorb humidity inside a boiler during dry lay up is: - ANS -
Activated alumina
A type of valve which can be operated by chains in the event of gauge glass breaking -
ANS - Quick closing valve
A unit heater is constructed similar to: - ANS - A duct furnace
A valve which often contains a dashpot to cushion the action of the valve is the: - ANS -
lift check valve
A very popular packaged boiler gas burner is the: - ANS - Ring burner
A weld made from both sides of the joint between two pieces of metal is? - ANS - A
double weld
A welder's certificate is usually good for what period of time? - ANS - 18 months
Air entering the microturbine is compressed in the __________. - ANS - Axial flow
compressor
Air filters used in warm air heating systems can trap
1. lint
2. dust
3. airborne particles
4. smoke - ANS - 1,2,3
An air atomizing compressor is usually what type? - ANS - A rotary type.
An air compressor, which uses start/stop capacity control: - ANS - must be fitted with
an electric motor
An emergency plan should include the ________________.
__________ heat is the amount of heat required to raise the temperature of a unit mass
of a substance 1 degree Celsius without changing the state of the substance. - ANS -
Specific
___________ are the building blocks of all matter. - ANS - atoms
____________ are required to prevent oil from spreading beyond the confines of a
heater in the event of a ruptured tube. - ANS - Dikes
A complete electrical circuit must be ______________________. - ANS - continuous
A disadvantage of using threads to join pipes and fittings is?: - ANS - the effective wall
thickness is reduced
A draft gauge on a furnace indicates the draft in: - ANS - mm of water column
A flushometer (flush valve) is: - ANS - a metering device.
A fuel storage tank must be located a minimum of ____ away from the furnace - ANS -
2 feet
A Ground Fault Circuit Interrupter (GFI) works on comparing __________ on different
sides of the circuit. - ANS - Current
A high limit control switch
a) is necessary on all boilers
b) activates after the safety valve opens
c) is a normally open switch
d) usually does not require manual resetting
e) must be used when a boiler is not under continuous supervision - ANS - E
A hot water circulation system which is difficult to balance due to the length of pipe
being different for each convector, is the ________ system - ANS - Two pipe direct
return
,A hot water circulation system which is self-balancing as a result of having all the
circuits the same length is the _________. - ANS - two-pipe reverse return
A manufacturers welding method must ___________________. - ANS - be qualified
under the applicable code
A method of backflow prevention which makes use of a separation between the free
flowing discharge of a potable water pipe and an open or non-pressure receiving vessel
is called __________ backflow prevention method. - ANS - air gap
A more modern method of ridding a boiler of dissolved solids is: - ANS - continuous
blowdown
A motor that has an extra winding in the stator to give added torque is called a: - ANS -
Split-phase motor
A PFD is ____________________. - ANS - A schematic of the process flow of a plant
(Process flow diagram)
A piping support device which allows axial movement of the pipe is the __________. -
ANS - adjustable roller stand
A potential hazard of working in a confined space entry may be where the work in
progress could cause: - ANS - equipment being used to become a hazard
A purpose of a liquid refrigerant control or regulating valve is: - ANS - Isolate the high
side from the low side.
A purpose of a steam trap is to: - ANS - automatically drain condensate from steam
lines
A refractory burner disadvantage is: - ANS - High initial cost
A smoke detector employing a short beam carried between the light source and
receiver, both mounted in a single ceiling-mounted unit, is called: - ANS - A spot type
photo-electric detector
A solenoid type fuel gas valve is held close by what? - ANS - Fuel pressure
, A substance, which will absorb humidity inside a boiler during dry lay up is: - ANS -
Activated alumina
A type of valve which can be operated by chains in the event of gauge glass breaking -
ANS - Quick closing valve
A unit heater is constructed similar to: - ANS - A duct furnace
A valve which often contains a dashpot to cushion the action of the valve is the: - ANS -
lift check valve
A very popular packaged boiler gas burner is the: - ANS - Ring burner
A weld made from both sides of the joint between two pieces of metal is? - ANS - A
double weld
A welder's certificate is usually good for what period of time? - ANS - 18 months
Air entering the microturbine is compressed in the __________. - ANS - Axial flow
compressor
Air filters used in warm air heating systems can trap
1. lint
2. dust
3. airborne particles
4. smoke - ANS - 1,2,3
An air atomizing compressor is usually what type? - ANS - A rotary type.
An air compressor, which uses start/stop capacity control: - ANS - must be fitted with
an electric motor
An emergency plan should include the ________________.
