Industrial Maintenance Final Exam
Review
alternating - answer____ current is current that reverses its direction of flow at regular
intervals.
voltage - answer____ is the amount of electrical pressure that causes electrons to move
in a circuit.
amperes - answer Current is measured in ____.
OCPD - answer A(n) ____ is a device that automatically opens a circuit to prevent
damage from a high-current condition.
contact - answer A(n) ____ is the conducting part of a switch that operates with another
conducting part to complete (close) or break (open) a circuit.
relay - answerA(n) ____ is an electrical switch that is actuated by a separate circuit.
open - answerA(n) ____ circuit is a circuit having an incomplete path, which prevents
current flow.
resistance - answer____ is the opposition to the flow of electrons.
conductor - answerA(n) ____ is a material that has little resistance and permits
electrons to move through it easily.
arcing - answer____ is the discharge of an electric current across a gap.
short - answerA(n) ____ circuit is an undesirable, low-resistance path for current to
leave the normal current-carrying path through a load.
series - answerA(n) ____ circuit is a circuit that has two or more components connected
such that there is only one path for current flow.
insulator - answer____ is a material that has a high resistance.
closed - answerA(n) ____ circuit is a circuit having a complete path for current flow.
ground - answerA(n) ____ circuit is a conducting connection between electrical
equipment and the earth.
, evaporator - answerA(n) ____ is a heat exchanger through which heat is transferred to
the low-pressure refrigerant liquid.
thermostat - answerA(n) ____ is a temperature sensor inside a temperature-controlled
space that sends signals to a control system in order to maintain a set temperature.
air-cooled - answer____ condensers are the most common condensers used in
refrigeration systems.
latent - answer____ heat is heat energy that causes a change of state but no
temperature change.
condenser - answerA(n) ____ is a heat exchanger that removes heat from high-
pressure refrigerant vapor.
recovery - answerRefrigerant ____ is the process of removing refrigerant from a system
and capturing it in a recovery cylinder, with no cleaning of refrigerant.
15 - answerA low-pressure boiler is a boiler that has an MAWP of up to ____ psi.
34.5; 212 - answerA boiler horsepower is the power available from the evaporation of
____lb of water per hour at a feedwater temperature of ____F.
100,000 - answerA therm is a unit of heat energy equivalent to ____ Btu.
true - answerT or F: A package boiler is preassembled at the factory.
primary - answer____ air is air in the combustion process that regulates the rate of
combustion.
heat - answerGrade is a coal classification related to size, ash, and ____.
sensible - answer____ heat is heat that can be measured by a change in temperature.
field-erected - answerA ____ boiler is a boiler that is constructed on-site.
scanner - answerA flame ____ is a safety device that senses if the pilot light and/or
main flame is lit.
10; 11.5 - answerBoiler water pH should be between ____ and ____.
dry - answer____ lay-up is storage of a boiler with all water drained.
lubricant - answerA(n) ____ is a substance that separates moving (bearing) surfaces to
reduce the friction and/or wear between them.
Review
alternating - answer____ current is current that reverses its direction of flow at regular
intervals.
voltage - answer____ is the amount of electrical pressure that causes electrons to move
in a circuit.
amperes - answer Current is measured in ____.
OCPD - answer A(n) ____ is a device that automatically opens a circuit to prevent
damage from a high-current condition.
contact - answer A(n) ____ is the conducting part of a switch that operates with another
conducting part to complete (close) or break (open) a circuit.
relay - answerA(n) ____ is an electrical switch that is actuated by a separate circuit.
open - answerA(n) ____ circuit is a circuit having an incomplete path, which prevents
current flow.
resistance - answer____ is the opposition to the flow of electrons.
conductor - answerA(n) ____ is a material that has little resistance and permits
electrons to move through it easily.
arcing - answer____ is the discharge of an electric current across a gap.
short - answerA(n) ____ circuit is an undesirable, low-resistance path for current to
leave the normal current-carrying path through a load.
series - answerA(n) ____ circuit is a circuit that has two or more components connected
such that there is only one path for current flow.
insulator - answer____ is a material that has a high resistance.
closed - answerA(n) ____ circuit is a circuit having a complete path for current flow.
ground - answerA(n) ____ circuit is a conducting connection between electrical
equipment and the earth.
, evaporator - answerA(n) ____ is a heat exchanger through which heat is transferred to
the low-pressure refrigerant liquid.
thermostat - answerA(n) ____ is a temperature sensor inside a temperature-controlled
space that sends signals to a control system in order to maintain a set temperature.
air-cooled - answer____ condensers are the most common condensers used in
refrigeration systems.
latent - answer____ heat is heat energy that causes a change of state but no
temperature change.
condenser - answerA(n) ____ is a heat exchanger that removes heat from high-
pressure refrigerant vapor.
recovery - answerRefrigerant ____ is the process of removing refrigerant from a system
and capturing it in a recovery cylinder, with no cleaning of refrigerant.
15 - answerA low-pressure boiler is a boiler that has an MAWP of up to ____ psi.
34.5; 212 - answerA boiler horsepower is the power available from the evaporation of
____lb of water per hour at a feedwater temperature of ____F.
100,000 - answerA therm is a unit of heat energy equivalent to ____ Btu.
true - answerT or F: A package boiler is preassembled at the factory.
primary - answer____ air is air in the combustion process that regulates the rate of
combustion.
heat - answerGrade is a coal classification related to size, ash, and ____.
sensible - answer____ heat is heat that can be measured by a change in temperature.
field-erected - answerA ____ boiler is a boiler that is constructed on-site.
scanner - answerA flame ____ is a safety device that senses if the pilot light and/or
main flame is lit.
10; 11.5 - answerBoiler water pH should be between ____ and ____.
dry - answer____ lay-up is storage of a boiler with all water drained.
lubricant - answerA(n) ____ is a substance that separates moving (bearing) surfaces to
reduce the friction and/or wear between them.
