9.1 Preventative maintenance of mechanical drive systems is divided into two subgroups - NSC Mechanical Technology Fitting and Machining - Question 9 - 2021 - Paper 1
Question 9
9.1 Preventative maintenance of mechanical drive systems is divided into two subgroups. Name the TWO subgroups.
9.2 State THREE preventative maintenance procedure... show full transcript
Worked Solution & Example Answer:9.1 Preventative maintenance of mechanical drive systems is divided into two subgroups - NSC Mechanical Technology Fitting and Machining - Question 9 - 2021 - Paper 1
Step 1
Preventative maintenance of mechanical drive systems is divided into two subgroups. Name the TWO subgroups.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The two subgroups of preventative maintenance for mechanical drive systems are:
Planned or scheduled maintenance.
Condition-based maintenance.
Step 2
State THREE preventative maintenance procedures to ensure that a gear drive performs well.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Three effective preventative maintenance procedures for gear drives include:
Checking and replenishing lubrication levels: Regularly inspect and replenish lubrication to prevent wear due to friction.
Ensuring proper gear alignment: Check that gears are correctly aligned and adjust as necessary to maintain smooth operation.
Cleaning and replacing oil filters: Ensure oil filters are monitored and replaced periodically to maintain clean lubrication and reduce contaminants.
Step 3
What is the purpose of a jockey pulley used in belt drives?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The purpose of a jockey pulley in belt drives is to help maintain tension within the system. By adjusting the angle of contact with the belt, it ensures that the belt remains securely engaged with the pulleys, thereby preventing slippage and contributing to efficient transmission.
Step 4
State TWO properties of EACH of the following materials:
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Step 5
Teflon
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Water resistant: Teflon does not absorb water, making it suitable for various applications.
Resistant to heat: It can withstand high temperatures without degrading.
Step 6
Nylon
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Tough: Nylon is known for its durability and resilience.
Can withstand high temperatures: It maintains its properties under varying temperature conditions.
Step 7
Vesconite
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Wear resistant: Vesconite provides resistance to wear, making it ideal for high-friction applications.
Low friction: It operates smoothly with minimal friction against other materials.
Step 8
Name ONE product that can be made from the following composites:
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Step 9
Polyvinyl chloride (PVC)
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A common product made from PVC is electrical cable insulation.
Step 10
Glass fibre
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A typical product made from glass fibre is boats.
Step 11
Explain the difference between thermoplastic and thermo-hardened composites.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The primary difference between thermoplastic and thermo-hardened composites lies in their properties and processing:
Thermoplastic composites can be re-heated and reshaped multiple times, making them versatile for various applications. They solidify upon cooling but do not undergo a chemical change, allowing for recycling.
Thermo-hardened composites, on the other hand, undergo a chemical change when heated, leading to a permanent hardening effect. Once set, they cannot be re-heated or reshaped, which limits their recycling possibilities.
