4B POWER ENGINEERING
COMPREHENSIVE TEST PAPER WITH
SOLVED QUESTIONS
◉ In refrigeration systems stop valves should be installed in the
following location(s) to isolate the system:
Liquid receiver inlet & outlet
Compressor suction line
All of the above
Compressor discharge line
Condenser inlet & outlet
Answer: All of the above
◉ Scaffolding that is supported by the facility building is referred
to as ____.
single cross scaffolding
single pole scaffolding
stand along scaffolding
double pole scaffolding
hazardous scaffolding
Answer: single pole scaffolding
,◉ When the product to be pumped flows from the vent, the pump
is considered ____.
vapor locked
vacuumed
purged
cavitated
primed
Answer: primed
◉ Despite there limitations, the capability to burn a wide range of
fuel sources is why ____ are still commonly being installed today.
fractionation units
steam plants
natural gas plants
pulp & paper mills
refineries
Answer: steam plants
◉ Mechanical seals are commonly installed on pumps to:
Reduce the maintenance requirements
,Reduce cavitation
Increase the efficiency
Purge the internal pump components
Increase the discharge pressure
Answer: Reduce the maintenance requirements
◉ The refrigerant heat gain must equal the ____ in the evaporator.
compressor heat loss
receiver heat loss
brine heat loss
condenser heat loss
oil heat loss
Answer: brine heat loss
◉ If the absolute pressure of a liquid is measured at the pumps
inlet, it is referred to as _____.
net positive discharge head available
net positive suction head required
net positive suction head available
net positive suction head
net positive discharge head
Answer: net positive suction head
, ◉ The evaporator pressure determines the operational ____.
evaporator temperature
compressor suction pressure
oil separator level
purge valve operation
receiver refrigerant level
Answer: evaporator temperature
◉ The hand wheel (speeder) installed on the turbine governor
____.
adjusts the turbines sentinel valve
adjusts the regenerator temperature
adjusts the turbines steam pressure
adjusts the turbines steam velocity
adjusts the turbine speed
Answer: adjusts the turbine speed
◉ ____ is the lowest temperature at which an oil releases enough
vapour to form an momentarily ignitable mixture in air provided
an ignition source.
COMPREHENSIVE TEST PAPER WITH
SOLVED QUESTIONS
◉ In refrigeration systems stop valves should be installed in the
following location(s) to isolate the system:
Liquid receiver inlet & outlet
Compressor suction line
All of the above
Compressor discharge line
Condenser inlet & outlet
Answer: All of the above
◉ Scaffolding that is supported by the facility building is referred
to as ____.
single cross scaffolding
single pole scaffolding
stand along scaffolding
double pole scaffolding
hazardous scaffolding
Answer: single pole scaffolding
,◉ When the product to be pumped flows from the vent, the pump
is considered ____.
vapor locked
vacuumed
purged
cavitated
primed
Answer: primed
◉ Despite there limitations, the capability to burn a wide range of
fuel sources is why ____ are still commonly being installed today.
fractionation units
steam plants
natural gas plants
pulp & paper mills
refineries
Answer: steam plants
◉ Mechanical seals are commonly installed on pumps to:
Reduce the maintenance requirements
,Reduce cavitation
Increase the efficiency
Purge the internal pump components
Increase the discharge pressure
Answer: Reduce the maintenance requirements
◉ The refrigerant heat gain must equal the ____ in the evaporator.
compressor heat loss
receiver heat loss
brine heat loss
condenser heat loss
oil heat loss
Answer: brine heat loss
◉ If the absolute pressure of a liquid is measured at the pumps
inlet, it is referred to as _____.
net positive discharge head available
net positive suction head required
net positive suction head available
net positive suction head
net positive discharge head
Answer: net positive suction head
, ◉ The evaporator pressure determines the operational ____.
evaporator temperature
compressor suction pressure
oil separator level
purge valve operation
receiver refrigerant level
Answer: evaporator temperature
◉ The hand wheel (speeder) installed on the turbine governor
____.
adjusts the turbines sentinel valve
adjusts the regenerator temperature
adjusts the turbines steam pressure
adjusts the turbines steam velocity
adjusts the turbine speed
Answer: adjusts the turbine speed
◉ ____ is the lowest temperature at which an oil releases enough
vapour to form an momentarily ignitable mixture in air provided
an ignition source.
