MSSC 4 Total Review

Chain sag can be changed by \__________ the sprockets.

Moving

A chain drive system has a driver sprocket with 72 teeth and a driven sprocket with 24 teeth. If the driver shaft has 1899 ft-lbs torque, the torque on the driven shaft will be \__________.

633 ft-lbs

Chain drive torque is the same as the gear ratio, meaning that when torque increases the sprocket ratio \__________.

Increases

Misaligned chain drives can be visually inspected to note vertical angular, horizontal angular, and \__________ parallel misalignments.

Horizontal

The ratio of the speeds of the sprockets is the \__________ of the sprocket ratio.

Inverse

Sprocket sizes are determined by the \__________ instead of the diameter of the sprocket.

Number of teeth

The chain climbing the sprocket is a symptom of which condition?

Excessive chain wear or sprocket wear

What is a master link?

The preferred method of connecting a chain

When a chain's length becomes 3% longer than its original length, \__________.

It is time to replace it

Chain drives deliver \__________ mechanical power than belt drives.

More

Timing belts are used in which of these drive belt drive applications:

Stepper motor applications and automobile engines

What is the belt drive ratio?

Driven sheave pitch diameter divided by the driver sheave pitch diameter

The shaft of a belt drive may be bent if the maintenance person performs an alignment check with a straight edge and finds what condition?

The straight edge initially contacts all four points, and after rotating the shaft, it only contacts two points.

What is the diameter of the driven pulley that is turning 700 rpm, when the 6-inch driver is rotating 2,100 rpm?

18 inches

The belt drive ratio is also used to calculate the belt drive torque. The formula is \__________ proportional to the drive ratio.

Directly

Which drive alignment method is faster and more accurate than the straight edge method?

Laser alignment

Prior to maintenance, a machine produced 100 parts per minute. The machine was designed to produce 200 parts per minute. The drive belt was replaced. The machine should now be monitored in order to verify that \__________.

It will produce 200 parts per minute

The following condition is an indicator of improper v-belt alignment.

Excessive bearing and belt wear

Measuring a groove angle for wear is a maintenance check performed on what machine component?

Belt drive sheave

In contrast to other types of belts, which of the following is determined to be properly adjusted when belt slap is eliminated?

Flat leather belts

A gear drive has a minimum of two gears called \__________.

Driver and driven

Gears are pre-aligned at the factory; however, the shafts of the gear box must be attached using a \__________ device to other shafts.

Coupling

The gear drive torque is \__________ the gear ratio.

Directly proportional to

To calculate the speed of a gear, the speed ratio and the \__________ will be needed.

Gear ratio

Which of the following gear types is used in machine tools like lathes, drills, and planer machines?

Rack and pinion

In a spur gearing system, the small gear is called the \__________.

Pinion

What is the name of the clearance that allows lubricant to reach the gear teeth?

Backlash

What is the gear ratio?

Driven gear pitch diameter divided by driver gear pitch diameter

If gear X turns clockwise at a constant speed of 10 rpm, how does gear Y turn?

Counterclockwise at 10 rpm

The gear system shown is added to a motor rotating at 200 rpm. What is the speed of the driven gear?

50 rpm

Which of the following is NOT a type of shaft-to-adjacent shaft power transmission?

Clutch drive

What causes soft foot?

Uneven mounting surfaces

\__________ all machine components before coupling them together will reduce the number of shims required for alignment.

Leveling

What type of bearing should be used for axial motion?

Thrust bearing

What introduces energy to a mechanical system?

Prime mover

A common sign of a misaligned coupling is \__________.

Excessive vibration

A shaft coupling may be out of round if a dial indicator shows what?

Any movement

Which flange is shown with the correct tightening sequence?

D

What is more efficient than a v-belt drive?

Chain drive

Motor shaft runout is checked to make sure of proper \__________.

Alignment of mating components

Too little lubrication of what component can cause seizing in a machine?

Bearings

True or false: A pillow block can only be designed as a one-piece assembly.

False

Mechanical power transmission systems usually convert what type of power received from other sources into mechanical power?

All of the above

Bearing seals can be damaged by what?

Excessive lubrication

In a well-organized plant, it should take a worker \__________ to find the right tool.

30 seconds

Placing tools and equipment where they can be reached with minimal strain is a characteristic of a \__________.

Well-designed workstation

To make sure tools remain in good working order, \__________.

Store them properly

How often the maintenance will occur is the primary consideration of what type of maintenance?

Preventive

\__________ are not permitted on the floor of a workstation.

Extension cords

A thorough check for a history of similar problems should occur \__________.

On problems that keeps recurring at regular intervals

What should a technician do before performing preventive maintenance?

Acquire tools and supplies, then shut down the machine

Sensor monitoring is the most useful aspect of what program?

Predictive maintenance

Zero defects and breakdowns is a goal of \__________.

TPM

What is everyone responsible for?

Keeping the work area clean of dirt, dust, and debris

A maintenance log records work performed on a piece of equipment. A maintenance log should be kept for \__________.

Every machine

The frequency of maintenance is usually an item found on the \__________.

Preventive maintenance schedule

The employee verifies that preventive maintenance is complete when \__________.

Closing out a PM work order

Results of tests, inspections, and a schedule for future maintenance can be found where?

Preventive maintenance log

Supply errors can be caused by relying on \__________ without monitoring their performance.

Suppliers

Noise, temperature, and vibration should be monitored when?

During machinery operations

What is preventive maintenance defined as?

Routine servicing at predetermined intervals

Perhaps the best place to store preventive maintenance records is \__________.

In a safe and secure location

What is an accelerometer used for?

Vibration measurement

To reduce the time needed to clean inaccessible areas, what should operators do?

Only A and B

When opening supplies at a workstation, place excess packaging materials where?

In appropriate trash/recycle bin

Recurring events can be analyzed to troubleshoot problems because what is recorded in daily records?

Daily maintenance

\__________ should preside over housekeeping inspections or audits.

Unbiased auditors or inspectors

A board with tool outlines for placement is called a \__________ and is a good way to make sure tools are returned to their proper storage space between uses.

Shadow board

What can be done after a corrective action form is completed?

Preventive maintenance should be documented as completed.

The best way to store liquids such as paint or cleaning fluids is \__________.

Sealed and in a cabinet

What is most closely associated with repair of broken parts?

Breakdown maintenance

An example of preventive maintenance is \__________.

Scheduled replacement of minor parts that wear out quickly

Corrective work is performed following preventive maintenance when \__________.

Problems are discovered

What is often outlined and detailed in a maintenance log?

Maintenance scheduling

Brooms and mops should be stored \__________.

In a designated area or cleaning closet

W. Edwards Deming's plan for continuous improvement is \__________.

Plan-do-check-act (PDCA)

Daily preventive maintenance procedures, such as machine lubrication, are \__________.

Planned maintenance activities

Slips and falls are the worst safety hazards when \__________.

Mopping floors

If a machine is obviously leaking, \__________.

The employee should notify a supervisor

What is an example of failure to follow preventive maintenance?

Skipping a scheduled cleaning

When a cutting tool provides unacceptable product quality results, it should be replaced and \__________.

Resharpened

A workstation designed to \__________ can reduce repetitive/stress injuries.

Minimize motions

The first thing an employee should do when discovering a building maintenance issue that negatively impacts his/her work area is \__________.

Report the situation to the supervisor

A borescope or fiberscope can be used to \__________ internal components.

Visually inspect

\__________ normally include verification that the floor is clean.

Routine housekeeping inspections

Product buildup is the most common vibration problem on \__________.

Air fans

A maintenance technician should arrange to have all routine tools and supplies ready to perform preventive maintenance on a machine in order to \__________.

Minimize equipment downtime

Proper guarding, lockout/tagouts, and electrical box covers are all verified during what?

Visual inspections of machines

Preventive maintenance is best described as what?

Periodic in nature

What is established when operating equipment is in good condition?

Normal running levels for physical characteristics

\__________ should be replaced immediately if found to be missing during an equipment inspection.

Safety guarding

A \__________ is important for a timely closure of PM work orders.

Completion date

\__________ should be disposed of in an OSHA-approved fireproof container.

Oily rags

Equipment should be inspected and reported to whom at the start of the production day?

Appropriate parties

Workers should perform an emergency shutdown of their equipment and notify their supervisor in which of the following circumstances?

They hear a loud banging noise coming from the equipment.

What contains equipment histories as well as maintenance, service, and preventive maintenance records?

All of the above

Reactive Maintenance is considered a(n) \__________ activity.

Unplanned maintenance

Design failure in a production line can be apparent by repeated maintenance failures and \__________.

The inability to meet performance demands

A worker should lubricate equipment \__________.

At regular intervals

During an oil analysis, high oil temperature can cause what symptom?

Burned or pungent odor