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WorksheetsEnd of Block Knowledge Assessment - MOCK
Total questions: 27
Worksheet time: 57mins
What is the use of a feeler gauge?
To measure the gap width
To measure the depth
To measure the thickness
To check straightness
Which of the following is incorrect about the feeler gauge?
The feeler gauge can be used to check spark plug caps
The feeler gauge has a number of blades of equal thickness
The blades are hinged in a sheath
Each thin blade is inter-leaved between two thick blades
Which of the following materials is used to manufacture slip gauges?
Aluminium
Lead
Brass
Hardened high-grade steel
What measuring tool would be needed to measure the concentricity and ovality of a shaft?
Depth micrometer
Vernier
Vibrometer
Dial test indicator
The reading on a 0 – 25mm micrometer if it was opened 19 turns from zero is?
36
19
9.5
4.75
State the reading on a 0 – 1” micrometer if it was opened 15 turns from zero.
0.375"
0.400"
0.325"
0.425"
Why do we carry out bolt tightening to specific standards?
To predict the behaviour of the bolt
To put design theories into practice
To try to prevent the failure of the joint during operation
To keep pace with the needs of the designer
Strain is the change in length divided by the?
50% of the change in length
Original length
% extension in length
Extended length
Force is measured in what units?
Megawatts
Cubic meters
Newtons
Litres
What is the Elastic Region in the Bolt Tightening Stress/Strain Curve?
Property of materials to rapidly stretch along its entire length and then form a “neck” after the maximum load has been reached.
Property of materials to deform under load but return to their original shape and size when load is removed.
Property of materials to fracture at a certain point when excessive load is applied.
Property of materials to deform under load but not return to their original shape and size when load is removed.
Given the steel bolt grade of 12.9 and the thread diameter of 18 mm, what is the value of the torque should we apply when tightening?
467.5 Nm
437.4 Nm
648 Nm
382 Nm
Which one of the following documents supports the validity of a torque wrench?
Conformity certificate
Calibration certificate/sticker
Accredited certificate
Service certificate
How is Torque defined?
Torque = Yield Strength x distance
Torque = Force x radius
Torque= Ultimate tensile strength x radius
Torque = Work done x distance
Identify from the following processes which one is not a controlled tightening method.
Hydraulic bolt tensioner
Socket bar and extension
Torque multiplier attached to a hydraulic torque wrench
Hydraulic torque wrench
Which of the guidelines for bolt tightening listed below is incorrect?
Specify a Tightening Sequence
Use a Calibrated Torque Wrench
Ensure Joints and Flanges are Concentric
Tighten bolts incrementally 60%, 90% then 100%
Why do we lubricate threads?
To reduce the amount of torque required to achieve the same load
To increase the coefficient of friction
To eliminate stocks of lubricants
None of the above
Tube is generally measured by the?
Nominal diameter
Nominal pipe size - NPS
Width
Length
Which of the pipe characteristics can be controlled through production?
Resistance to vibration
Diameter
Length
End finish
Wall thickness
How can we alleviate pipework expansion?
Installing more elbows
Installing less fittings
Installing expansion loops
Installing Victaulic joints
Looking at pipework identification by colour the pipe that carries general chemicals and acids should be painted in?
Green
Yellow
Brown
Violet
What is the primary goal of lubrication?
To increase friction
To reduce wear and heat
To add colour
To increase surface roughness
Which of the following is NOT a function of lubricating oil?
Reduce friction
Provide insulation
Increase wear
Cool surfaces
What is the term for the resistance encountered when one body moves relative to another?
Lubrication
Viscosity
Friction
Erosion
What is the lowest temperature at which oil will flow called?
Pour Point
Flash Point
Cloud Point
Boiling Point
Which additive is used to control the viscosity of multi-grade oils?
Rust Inhibitors
Anti-Wear Agents
Viscosity Index Improvers
Detergents
What kind of oil is derived from naturally occurring petroleum?
Synthetic oil
Paraffinic oil
Naphthenic oil
Mineral oil
Which property is essential for oils that must flow at low temperatures?
High viscosity
High flash point
Low pour point
High density
