Prelim engineering revision

What is the Mechanical Advantage of a machine if a 30 N force lifts a 20 kg load?

• 5.67
• 6.67
• 7.0
• 8.0

What is the effort required to lift a load of 300 N if a lever is 1.5 m long and a fulcrum is placed 300 mm from the load?

• 70 N
• 75 N
• 80 N
• 85 N

If the maximum force resisting shear offered by the sheet metal is 0.85 kN, find the effort force required.

• 206 N
• 210 N
• 220 N
• 230 N

Calculate the force which must be applied to the handle to hold a wheelbarrow up with a load of 46 kg.

• 150 N
• 184 N
• 190 N
• 220 N

What is the force required at E to balance a 5kg rock on a shovel used as a lever?

• 10 N
• 13 N
• 15 N
• 18 N

What structure do most metals form?

• Amorphous
• Crystalline
• Polymer
• Liquid

What is the primary constituent of ferrous metals?

• Carbon
• Zinc
• Iron
• Aluminium

What is main use for copper due to its properties?

• Structural material
• Electrical conductor
• Decorative arts
• Thermal insulation

Which alloy is made of copper and tin?

• Brass
• Bronze
• Steel
• Zinc

What process involves heating a material to a specific temperature and cooling slowly?

• Quenching
• Annealing
• Precipitation hardening
• Sintering