MSSC Maintenance Awareness Practice Test

These questions are part of the practice quiz. Start practicing

• Which statement best describes the basic chain drive components?
• Which logic element describes two or more normally closed switches in parallel?
• Which timer type delays the activation of its output after energization?
• Which device is capable of measuring voltage, current, and resistance?
• The type of current that only flows in one direction is __________.
• When machinery binds or jams, which protective device is typically engaged?
• A(n) __________ bearing has inner and outer races that allow it to carry heavier axial loads than a standard ball bearing.
• Bearing metal that flexes during use is the cause of __________ in a bearing.
• Multiple strand chains are used __________.
• The action of old grease coming out somewhere is a good sign of which condition?
• Metals treated by which process become soft?
• The ________ filter, used for low pressure applications, has a removable cartridge that can be cleaned or replaced.
• Which term describes the distance between the contact points on the two pulleys where the belt touches?
• Both analog and digital voltmeters measure __________.
• Which statement about V-belt position in the groove is true?
• Limit switches used to trigger a sequence of actions in order are typically part of which circuit type?
• The 3-way DCV spool is held in the energized position by the __________.
• Which component of a spot welding system remains stationary during operation?
• NOT logic is formed by __________.
• Which statement best describes the suitability of white grease FGL-1?
• Which instrument is used to measure potential difference between two points in a circuit?
• Smaller dirt particles are removed from the air by which part of the filter?
• A hydraulic cylinder is commonly referred to as an ______.
• An on-delay timer relay's contacts will not change states until ______.
• The most often used grease is ______ because it provides excellant lubrication under moderate loads and also at high temperatures and speeds.
• What design feature prevents oxygen and acetylene from mixing inside a welding torch?
• When current in a circuit is too high, it is usually the result of too many loads or a __________.
• Which substance must be kept away from high-pressure oxygen to prevent an explosion?
• The two ways to measure voltage are __________ and __________.
• The total power in __________ electrical circuit is calculated by finding the sum of the individual component power consumption.
• Which statement is true about power diagrams in relation to ladder diagrams?
• What is the power formula?
• A belt drive having a 12 inch driver pulley and a 6 inch driven pulley has a pulley ratio of__________.
• What device converts electrical energy into a magnetic field to operate a valve?
• Which non-destructive test uses a colored spray to reveal imperfections in a weld?
• Which color hose indicates acetylene gas?
• Conduit is used to protect electrical wiring from physical damage when installed in exposed locations.
• A voltmeter is typically connected in which configuration to measure the voltage across a component?
• The best data collection procedure to use for an oil analysis is to __________.
• In the process of installing a chain drive system, the motor and driven component should be checked for a soft foot condition and excessive run-out. The shaft run-out should be no more than __________.
• In a 3-position, 5-way DCV, what holds the valve in the mid-position?
• A spot welding system consists of an electrical supply, moveable arm, and a(n) __________.
• Which misalignment types are corrected by shaft alignment?
• What does DCV stand for?
• When drawing a hydraulic schematic, one rule to remember is to always draw the components ______.
• The hydraulic motor converts hydraulic flow into ______.
• OR logic is formed by __________.
• The mechanical advantage of a gear drive system is the ratio of the number of teeth of the driven gear divided by __________.
• The amount of dirt collected by a filter when the pressure reaches a predetermined point is called the ______.
• There are seven basic types of oils in use today. How many basic oil types are there?
• Saybolt Universal Seconds are a unit used to measure which property of oil?
• An electrical diagram that arranges wires of a circuit into orderly rows is called a(n) __________.
• On a hydraulic schematic, the default state for components should be shown as ______ unless specified otherwise.
• Which statement is not true of a ladder diagram?
• If a wire has high resistance, what can be inferred about its ability to conduct current?
• In welding, the function of filler metal is to:
• The three (3) types of shaft-to-adjacent-shaft power transmissions are__________.
• Chain sag is measured by rotating the sprockets so there is little or no chain sag in the __________ side and measuring the sag in the __________ side.
• A chain drive system has a driver sprocket with 24 teeth and a driven sprocket with 72 teeth. If the driver shaft has 633 ft-lbs torque, the torque on the driven shaft will be __________.
• In relay logic, what component closes or opens paths to energize a load when the coil is energized?
• A power diagram is needed with a ladder diagram to show __________.
• The power is connected to a single phase motor using __________ lines.
• Heavy axial loads are better handled by which type of bearings?
• Which safety guideline applies to oxygen cylinders relative to flammable materials?
• One important characteristic of a timing belt is that__________.
• In a parallel circuit, adding a branch will most directly affect the total current from the power supply by:
• Because of its design, an offset chain does not require a connecting link. For this reason, it is normally used in __________.
• To prevent leakage around the valve during use, how should the oxygen cylinder valve be opened?
• A shaft coupling may be out of round if a dial indicator shows __________.
• A chain should be replaced when its length becomes __________ longer than the original length.
• What is not considered one of the five basic components of a hydraulic system?
• In automation systems, relays are commonly used for what role?
• In the same example, which of the following expresses the ratio of driven to driver teeth?
• The fractional horsepower V-belt is also known as what?
• One method of deenergizing a seal-in circuit is to use ______.
• Placing a filter in this location allows the filter to be cleaned without shutting down the machine.
• The poppet of a pressure regulator is opened by which component?
• As branches are added to a parallel circuit the resistance decreases.
• Two or more normally closed switches wired in series describe which logic element?
• Voltage is a form of electrical what?
• Devices called __________ often serve as the brains of an automated machine.
• Two normally closed switches connected in parallel implement which logic function?
• The pitch circle of a belt drive is__________.
• The manual method of lubrication is used which scenario?
• NOT logic in ladder circuits is typically implemented using which configuration?
• The most basic way to test the tension of a belt is to use __________.
• ________ prevents large particles from damaging the pump and is placed in the reservoir.
• Kirchhoff's Voltage Law for a series circuit states that the total voltage drop is equal to what?
• The three qualities used when specifying a grease are: type of soap, hardness, and ______.
• When lubricating a pillow block bearing, you should pump until what occurs?
• A double-acting cylinder will extend when oil flows into the ______.
• Which of the following is not one of the shaft-to-adjacent-shaft power transmission types?
• Which description correctly identifies the pitch circle?
• It is standard practice to carry the flow of electricity to a solenoid through ______.
• A control circuit that uses limit switches to sequence a series of events is called a(n) __________.
• If a chain drive uses a 24-tooth driver and a 72-tooth driven, what is the sprocket ratio?
• In Ohm's Law, which form correctly describes the relationship between voltage, current, and resistance?
• The maximum allowable deflection force on a belt is __________ than the minimum deflection force.
• What are hydraulic filters rated by?
• A red welding hose indicates the hose carries which gas?
• Which device is commonly used to reset or stop a held output in a seal-in circuit?
• Electrical wiring that runs in exposed locations must be protected by pipe or tubing called __________.
• Which grease property among the listed options is used to indicate high-temperature performance and is included among the three grease qualities?
• While troubleshooting a hydraulic system, if the oil in the reservoir has a milky color, what does this indicate?
• Where are the two bearings of a typical electric motor mounted?
• The measure of energy consumed by a circuit is called __________.
• Loss of lubrication __________.
• Current in a parallel circuit is divided among the branches.
• A multimeter is a multipurpose device that can measure _________.
• The sprocket ratio for a chain drive system having a driven sprocket with 54 teeth and a driver sprocket with 18 teeth is __________.
• In a parallel circuit with a constant voltage power supply, the voltage drop across each branch is __________.
• A machine shaft and bore should always be checked for out-of-round status before performing which task?
• In a pneumatic system, which line conveys air from the supply to the actuator?
• What device should be stored a minimum of 20 feet from flammable materials?
• Leaf chain is commonly used in which equipment?
• Which term describes a load on bearings that is neither purely radial nor exclusively axial?
• Bearing seals can be damaged by which practice?
• The gas metal arc welding (GMAW) process uses __________ to melt metal wire and fuse it with the base metal being welded.
• What component provides the restoring force to return a 3-position, 5-way DCV to center when not actuated?
• Constant voltage power supplies will maintain a constant voltage under varying __________.
• A lube oil sample from a gearbox should be taken __________.
• What is the key difference between a fuse and a circuit breaker?
• In GMAW, what primarily supplies the energy to melt the metal filler wire?
• The three (3) basic components of a chain drive system are__________.
• Lubrication points should always be __________ before adding oil to a system.
• Oxy-acetylene welding requires no electricity and is not sensitive to wind or drafts like SMAW or GTAW. Which statement best reflects this?
• In a pressure line filter, which part is replaceable?
• Lubrication and other ______ maintenance activities should be checked daily to ensure they are being performed.
• The two major types of misalignment that are corrected by shaft alignment are __________.
• A(n) __________ circuit is one in which there is more than one path for current to travel.
• An explosion can occur if which substance comes in contact with oil?
• A green welding hose normally carries which gas?
• A dial indicator is used to detect what condition in a shaft coupling?
• Which instrument is used to measure current in a circuit?
• The SI unit for pressure is which of the following?
• Which component could be described as the source of hydraulic power by creating flow and pressure?
• Which one of the following logic elements describes a circuit with two normally open switches in series?
• A ______ shows when DHC of a filter has been reached.
• Which statement best describes the relationship between oxy-acetylene welding and electricity, as well as wind sensitivity?
• Another name for a cylinder would be a(n) ______.
• What does a milky oil indicate in hydraulic reservoirs?
• The filter element in a pneumatic system primarily removes what from the air?
• Which device is resettable after a fault, unlike a fuse?
• Which device is used to determine whether AC electricity is present in a circuit?
• Which range best describes the typical accuracy of a viscosimeter?
• Belt span is defined as the __________.
• Which term describes a bearing in which the moving surface slides over a plain bearing surface with a lubrication film between them?
• __________ lubricants are ideal for use in extreme temperatures that would cause oils and greases to freeze or burn out.
• The component of an electrical circuit that gives the operator control is the __________.
• Before installing a flexible coupling you should check for __________.
• Which bearing arrangement is suitable for heavy axial loading?
• __________ couplings are used to act as a safety device if torque overload occurs.
• Sight glasses are accurate on a gearbox when?
• Which of the following is NOT a primary component of a belt drive system?
• The procedure for aligning two shafts is to check and correct for __________and______misalignment in two planes, vertical and horizontal.
• 10mA would be an example of __________ value.
• In a mechanical transmission system an electric motor is also called a __________.
• Three types of loads placed on bearings are __________,__________and__________.
• Low pressure in a hydraulic pump's suction line causes which malfunction?
• Which instrument is used to measure resistance?
• In the calculation of shaft speed and shaft torques of a belt drive system, which of the following applies?
• A hydraulic motor primarily produces ______ motion from hydraulic energy.
• What device provides the means by which electrical circuits control pneumatic or hydraulic systems?
• An ammeter is used to measure __________.
• Which term best describes a component that allows operator input to control a circuit?
• Before adjusting motor position during a shaft alignment, what should you remove?
• What is the recommended practice for sampling to detect gear wear in a gearbox?
• Which of the following is not a component of a ladder diagram?
• In the example with a 24-tooth driver and a 72-tooth driven, the driven torque is 1899 ft-lbs. Which statement is true about this example?
• Milky oil is most likely caused by the presence of which contaminant?
• The amount two electrical waveforms are out of phase is measured in __________.
• How many bearings do all electric motors require, and where are they mounted?
• If a wire has continuity, it will have almost no resistance.
• The three (3) components for a belt drive system are:
• Turning outputs on or off through relay contacts is called ______.
• What is the purpose of shaft alignment in a two-shaft system?
• In a pressure line filter, the metal casing is called a bowl. This design feature provides what primary purpose?
• A valve that is commanded by an electric coil to direct flow to different passages is known as a ______.
• Which statement accurately reflects the relationship between lubrication points and oil addition?
• If a circuit contains several devices, the total power drawn equals the sum of each device's power rating.
• Which bearing type is best suited for heavy axial loads?
• The coupling provides a secure method of transmitting __________ from one shaft to another.
• A ______ filter is designed to handle the full pressure of the hydraulic system. It uses a replaceable cartridge and is enclosed in a metal casing called a bowl.
• Motor shaft runout is checked to make sure of proper __________.
• Compared to a V-belt drive, a chain drive __________.
• Product buildup is the most common vibration problem on which equipment?
• Which of the following statements best describes the relationship between pulley sizes and the speed of the driven shaft in a belt drive?
• White grease, or FGL-1, is used for what application?
• Sight Glass Readings in gearboxes are accurate under what condition?
• Which statement best describes the purpose of clutch couplings in a drive system?
• The V-belt should ride __________ in the groove with its top near the top of the sheave; the V-belt does not touch the __________ of the sheave.
• What term describes a holding arrangement in a control circuit that maintains its output after the initiating action is released?
• The type of overload protection that protects the motor by disconnecting it physically instead of electrically is a(n) __________.
• In a pneumatic system, which lines are considered conductors?
• Filler metal is defined as which of the following in welding terminology?
• Which is considered a fluid system?
• An off delay timer contact ______.
• In the United States, oil viscosity is measured in which units?
• The fractional horsepower (FHP) V-belt, also called a light duty belt is designed for low power application below __________Hp.
• Which side of the chain experiences sag when properly tensioned with the taut side remaining tight?
• DHC stands for what in hydraulic filter terminology?
• An indication of bearing problems could be __________.
• There are seven basic types of oils in use today. One of these is refrigeration oils which has a function to__________.
• A viscosimeter is a device used for measuring the viscosity of an oil and is generally __________ accurate.
• The ______ filter, commonly used on suction or return lines, is similar in appearance to a pressure line filter but cannot withstand the full pressure of the hydraulic system.
• Which type of logic element uses a relay?
• The radial load capacity of a linear bearing increases with __________.
• A machine's moving component slides over a(n) __________ bearing's surface with only a lubrication film between them.
• Grease is made by adding a thickener such as ______ to a liquid lubricant.
• When using the pull technique in welding, by how many degrees should the electrode be leaned toward the travel direction?
• A magnaflux test is used to show what flaw in ferrous metal?
• Fluid samples are normally taken from the middle of the reservoir while the machine is still in operation when analyzing a __________.
• Circuit testers determine if __________ electricity is present.
• Which condition is caused by a low-resistance path that bypasses the load and causes high current?
• Oil contaminated by which substance will have a milky appearance?
• To protect the pump from contaminants, a __________ is typically located near the reservoir.
• The Ohm's Law formula for calculating voltage is __________.
• Which of the following is not an element of control logic?
• A knife switch consists of a lever and one or more sets of __________.
• Pitch is defined as the distance between a point and a __________.
• Most hydraulic motors are modified designs of ______.
• Which welding process uses no electricity and is not sensitive to wind or drafts?
• Chain wrenches, forklifts, and other hoisting devices commonly use this type of chain.
• If three voltage drops in a series circuit are 2V, 4V, and 3V, what is the total voltage drop?
• What device is commonly described as the brains of an automated system?