WorksheetsMechanical Engineering Maintenance Worksheet
Total questions: 20
Worksheet time: 11mins
A machine is considered environmental if:
it minimises harm to the environment and the working environment around it
it operates at high speed
it is very expensive
it requires a lot of energy
The six-point fault-finding technique refers to:
A systematic approach involving six steps to identify and resolve faults in a system.
A method for organizing six tools for maintenance.
A checklist for six types of electrical faults.
A procedure for testing six different machines.
The flash point of a liquid, i.e., oil, is defined as:
The lowest temperature at which it gives off enough vapor to ignite in air.
The temperature at which it boils.
The temperature at which it freezes.
The temperature at which it becomes solid.
The 3 types of friction (SDS) are:
Static, Dynamic, Sliding
Static, Rolling, Fluid
Sliding, Rolling, Fluid
Static, Sliding, Rolling
We use split journal bearings when it comes to shaft removal because:
they allow easy removal of the shaft without dismantling the entire bearing housing.
they provide better lubrication than solid bearings.
they are less expensive than other types of bearings.
they increase the load-carrying capacity of the shaft.
The main cause of failure with bearings (Think about ingress) is:
Water ingress
Excessive lubrication
High temperature
Improper installation
The relationship between power and the arc on a contact is:
Higher power results in a stronger arc.
Lower power results in a stronger arc.
Power has no effect on the arc.
Arc strength is independent of power.
Select the tooling or devices used to tension high-torque synchronous chain drives.
Torque wrenches
Hydraulic tensioners
Screwdrivers
Rubber mallets
How would you calculate the speed of the driven gear (RPM) = Speed of the driver (RPM) to find X?
Multiply the speed of the driver by the gear ratio
Divide the speed of the driver by the gear ratio
Add the speed of the driver and the gear ratio
Subtract the gear ratio from the speed of the driver
A rack and pinion can be found on which of the following machining devices in a workshop or industry?
Lathe carriage mechanism
steering system
Drill press chuck
Belt sander
Beveled gears are used for which of the following purposes (Think about angles)?
To change the direction of a shaft's rotation at an angle
To increase the speed of rotation without changing direction
To reduce friction between moving parts
To transmit power over long distances
Centrifugal clutches are typically used in which situations and found on what types of equipment?
They are used where automatic engagement is needed, commonly found on go-karts, chainsaws, and small engines.
They are found on small mechanism tooling like chainsaws, hand drills and small engines.
They are used for high-speed industrial machinery, commonly found on conveyor belts and turbines.
They are used for hydraulic systems, commonly found on excavators and cranes.
Seals can be defined as Static, and what other type?
Dynamic
Permanent
Flexible
Rotary
Labyrinth seals are normally used to compress what?
air
oil
water
steam
The type of monitoring used to stop/predict catastrophic failure is:
Predictive monitoring
Routine inspection
Manual observation
Reactive maintenance
We primarily use felt seals because:
They are effective at retaining lubrication and excluding dust.
They are used for high-pressure sealing applications.
They are preferred for their high-temperature resistance.
They are mainly chosen for their decorative appearance.
You have to change a bearing out and find that it needs to be expanded to fit a shaft. How would it be done correctly?
Heat the bearing before installation.
Cool the shaft before installation.
Hammer the bearing onto the shaft.
Lubricate the bearing excessively before installation.
The optimum temperature range for spiral wound gaskets and the industry that primarily uses them is:
-200°C to 1000°C; Oil and Gas Industry
0°C to 200°C; Food Processing Industry
100°C to 500°C; Textile Industry
-50°C to 300°C; Automotive Industry
The main reasons we proofmark components as a maintenance engineer are:
To ensure correct assembly and prevent errors
To increase the weight of the components
To change the color of the components
To reduce the lifespan of the components
The purpose of a thread insert is:
to provide durable threads in soft materials
to replace damaged threads when area an not be drilled or re tapped
to reduce friction between moving parts
to prevent corrosion of fasteners
