INDUSTRIAL MAINTENANCE 2026 STUDY GUIDE
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is a coulomb? - ✔✔unit of electric charge, equal to the quantity of electricity
conveyed in one second by a current of one ampere.
✔✔What is the decimal value of the highest symbol in the hexadecimal system? -
✔✔F=15 0-9A-F
✔✔What term describes the use of four binary digits to represent on decimal digit? -
✔✔BCD Binary Code Decimal
✔✔An electric motor has an apparent resistance of 15 ohms. If 8 amps of current are
flowing through the motor, what is the connected voltage? - ✔✔120v
✔✔Newly installed motor runs in reverse direction, state the suspected fault? - ✔✔leads
L1 and L3 may need to be reversed
✔✔What test equipment is used to measure KW? - ✔✔Wattmeter
✔✔What test equipment is used to measure kva - ✔✔clamp on ammeter
✔✔What is the most common type of rotor used in a 3phase AC motor? - ✔✔squirrel
cage
✔✔What is the formula required to calculate the proper Phase voltage across single
phase to neutral, and what voltage indicates a good reading, given its rating: 3phase
4wire, 240V motor. - ✔✔240/1.73=138 volts
✔✔What is the purpose of a steam trap? - ✔✔discharge condensation and non
condensables
✔✔: State the formula and SI units for PRESSURE - ✔✔P=F/A F=PxA
✔✔State the formula and SI units for AREA OF A TRIANGLE - ✔✔A=1/2xBxH
✔✔State the formula and SI units for AREA OF A CIRCLE - ✔✔A=PIxR,2
✔✔State the formula and SI units Volume of cylinder - ✔✔V=PIxR,2xH
✔✔A fundamental rule of liquids that makes them suitable for use in hydraulic
operations is that liquids are essentially ____________________. - ✔✔Incompressable
, ✔✔List 3 primary reasons for lubrication. - ✔✔seal out dirt and contaminants. reduce
friction. prevent corrosion
✔✔What does "N.P.T." stamped on the side of a Tap stand for? - ✔✔National Pipe
Thread
✔✔Which motors are associated with the term Slip - ✔✔Synchronous. The difference
between the synchronous speed of the magnetic field, and the shaft rotating speed is
slip
✔✔Needle Valve - ✔✔Regulate accurate flow control
✔✔Ball Valve - ✔✔Quick acting, 90* on/ off control. No Pressure drop
✔✔Gate Valve - ✔✔Used for isolation during fluid flow
✔✔Globe Valve - ✔✔A linear motion valve used to stop, start, and regulate fluid flow.
Most common valve in a propulsion plant
✔✔Check Valve - ✔✔used to prevent backflow. Fluid flows in one direction
✔✔butterfly valve - ✔✔Start, stop, and regulates large flow at low pressure
✔✔A device used to transfer heat energy from one fluid to another without direct
contact is called a_______________________. - ✔✔heat exchanger
✔✔Fluid power which uses compressed air to affect mechanical motion is called
_____________________. - ✔✔Pneumatics
✔✔A type of bearing used to withstand axial forces which push or pull along the bearing
axis is called a __________________. - ✔✔Thrust bearing
✔✔A type of bearing designed to withstand forces perpendicular to the axis or shaft is
called a __________________. - ✔✔Radial bearing
✔✔A type of bearing which uses long, thin cylinders to move in an oscillary motion
rather than rotary__________________. - ✔✔Needle bearing
✔✔It is stated that 1 cubic foot of water weighs 62.4 pounds. Using Pascal's law for
force, calculate the pressure on the bottom of the container. - ✔✔62.4/144in= .433lbft
✔✔What are the five basic components associated to a Hydraulic system and discuss
each of their functions? - ✔✔1.Reservoir-Holds the hydraulic fluid.
QUESTIONS AND SOLUTIONS RATED A+
✔✔What is a coulomb? - ✔✔unit of electric charge, equal to the quantity of electricity
conveyed in one second by a current of one ampere.
✔✔What is the decimal value of the highest symbol in the hexadecimal system? -
✔✔F=15 0-9A-F
✔✔What term describes the use of four binary digits to represent on decimal digit? -
✔✔BCD Binary Code Decimal
✔✔An electric motor has an apparent resistance of 15 ohms. If 8 amps of current are
flowing through the motor, what is the connected voltage? - ✔✔120v
✔✔Newly installed motor runs in reverse direction, state the suspected fault? - ✔✔leads
L1 and L3 may need to be reversed
✔✔What test equipment is used to measure KW? - ✔✔Wattmeter
✔✔What test equipment is used to measure kva - ✔✔clamp on ammeter
✔✔What is the most common type of rotor used in a 3phase AC motor? - ✔✔squirrel
cage
✔✔What is the formula required to calculate the proper Phase voltage across single
phase to neutral, and what voltage indicates a good reading, given its rating: 3phase
4wire, 240V motor. - ✔✔240/1.73=138 volts
✔✔What is the purpose of a steam trap? - ✔✔discharge condensation and non
condensables
✔✔: State the formula and SI units for PRESSURE - ✔✔P=F/A F=PxA
✔✔State the formula and SI units for AREA OF A TRIANGLE - ✔✔A=1/2xBxH
✔✔State the formula and SI units for AREA OF A CIRCLE - ✔✔A=PIxR,2
✔✔State the formula and SI units Volume of cylinder - ✔✔V=PIxR,2xH
✔✔A fundamental rule of liquids that makes them suitable for use in hydraulic
operations is that liquids are essentially ____________________. - ✔✔Incompressable
, ✔✔List 3 primary reasons for lubrication. - ✔✔seal out dirt and contaminants. reduce
friction. prevent corrosion
✔✔What does "N.P.T." stamped on the side of a Tap stand for? - ✔✔National Pipe
Thread
✔✔Which motors are associated with the term Slip - ✔✔Synchronous. The difference
between the synchronous speed of the magnetic field, and the shaft rotating speed is
slip
✔✔Needle Valve - ✔✔Regulate accurate flow control
✔✔Ball Valve - ✔✔Quick acting, 90* on/ off control. No Pressure drop
✔✔Gate Valve - ✔✔Used for isolation during fluid flow
✔✔Globe Valve - ✔✔A linear motion valve used to stop, start, and regulate fluid flow.
Most common valve in a propulsion plant
✔✔Check Valve - ✔✔used to prevent backflow. Fluid flows in one direction
✔✔butterfly valve - ✔✔Start, stop, and regulates large flow at low pressure
✔✔A device used to transfer heat energy from one fluid to another without direct
contact is called a_______________________. - ✔✔heat exchanger
✔✔Fluid power which uses compressed air to affect mechanical motion is called
_____________________. - ✔✔Pneumatics
✔✔A type of bearing used to withstand axial forces which push or pull along the bearing
axis is called a __________________. - ✔✔Thrust bearing
✔✔A type of bearing designed to withstand forces perpendicular to the axis or shaft is
called a __________________. - ✔✔Radial bearing
✔✔A type of bearing which uses long, thin cylinders to move in an oscillary motion
rather than rotary__________________. - ✔✔Needle bearing
✔✔It is stated that 1 cubic foot of water weighs 62.4 pounds. Using Pascal's law for
force, calculate the pressure on the bottom of the container. - ✔✔62.4/144in= .433lbft
✔✔What are the five basic components associated to a Hydraulic system and discuss
each of their functions? - ✔✔1.Reservoir-Holds the hydraulic fluid.
