INDUSTRIAL MAINTENANCE FINAL
EXAM REVIEW QUESTIONS AND
ANSWERS (GRADED A)
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 - ANSWER-A(n) ____ is an electrical switch that is actuated by a separate circuit.
open - ANSWER-A(n) ____ circuit is a circuit having an incomplete path, which
prevents current flow.
resistance - ANSWER-____ is the opposition to the flow of electrons.
conductor - ANSWER-A(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 - ANSWER-A(n) ____ circuit is an undesirable, low-resistance path for current to
leave the normal current-carrying path through a load.
series - ANSWER-A(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 - ANSWER-A(n) ____ circuit is a circuit having a complete path for current flow.
ground - ANSWER-A(n) ____ circuit is a conducting connection between electrical
equipment and the earth.
, evaporator - ANSWER-A(n) ____ is a heat exchanger through which heat is transferred
to the low-pressure refrigerant liquid.
thermostat - ANSWER-A(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 - ANSWER-A(n) ____ is a heat exchanger that removes heat from high-
pressure refrigerant vapor.
recovery - ANSWER-Refrigerant ____ is the process of removing refrigerant from a
system and capturing it in a recovery cylinder, with no cleaning of refrigerant.
15 - ANSWER-A low-pressure boiler is a boiler that has an MAWP of up to ____ psi.
34.5; 212 - ANSWER-A boiler horsepower is the power available from the evaporation
of ____lb of water per hour at a feedwater temperature of ____F.
100,000 - ANSWER-A therm is a unit of heat energy equivalent to ____ Btu.
true - ANSWER-T 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 - ANSWER-Grade 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 - ANSWER-A ____ boiler is a boiler that is constructed on-site.
scanner - ANSWER-A flame ____ is a safety device that senses if the pilot light and/or
main flame is lit.
10; 11.5 - ANSWER-Boiler water pH should be between ____ and ____.
dry - ANSWER-____ lay-up is storage of a boiler with all water drained.
EXAM REVIEW QUESTIONS AND
ANSWERS (GRADED A)
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 - ANSWER-A(n) ____ is an electrical switch that is actuated by a separate circuit.
open - ANSWER-A(n) ____ circuit is a circuit having an incomplete path, which
prevents current flow.
resistance - ANSWER-____ is the opposition to the flow of electrons.
conductor - ANSWER-A(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 - ANSWER-A(n) ____ circuit is an undesirable, low-resistance path for current to
leave the normal current-carrying path through a load.
series - ANSWER-A(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 - ANSWER-A(n) ____ circuit is a circuit having a complete path for current flow.
ground - ANSWER-A(n) ____ circuit is a conducting connection between electrical
equipment and the earth.
, evaporator - ANSWER-A(n) ____ is a heat exchanger through which heat is transferred
to the low-pressure refrigerant liquid.
thermostat - ANSWER-A(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 - ANSWER-A(n) ____ is a heat exchanger that removes heat from high-
pressure refrigerant vapor.
recovery - ANSWER-Refrigerant ____ is the process of removing refrigerant from a
system and capturing it in a recovery cylinder, with no cleaning of refrigerant.
15 - ANSWER-A low-pressure boiler is a boiler that has an MAWP of up to ____ psi.
34.5; 212 - ANSWER-A boiler horsepower is the power available from the evaporation
of ____lb of water per hour at a feedwater temperature of ____F.
100,000 - ANSWER-A therm is a unit of heat energy equivalent to ____ Btu.
true - ANSWER-T 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 - ANSWER-Grade 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 - ANSWER-A ____ boiler is a boiler that is constructed on-site.
scanner - ANSWER-A flame ____ is a safety device that senses if the pilot light and/or
main flame is lit.
10; 11.5 - ANSWER-Boiler water pH should be between ____ and ____.
dry - ANSWER-____ lay-up is storage of a boiler with all water drained.
