When using a bench grinder to repair a flat-blade screwdriver, which combination of personal protective equipment (PPE) is most appropriate?

• safety glasses, protective clothing and earmuffs
• safety glasses, earmuffs and leather gloves
• safety glasses, hairnet and leather gloves
• safety glasses, hard hat and earmuffs

During a manufacturing process, a small electrical fire starts. The most appropriate action to take would be to immediately stop all work and then

• call out ‘Fire!’ and leave the workshop.
• leave the workshop in an orderly manner.
• look for the nearest fire extinguisher.
• raise the alarm and use a dry powder extinguisher on the fire.

Below is a diagram of a tension wrench that can be extended. The tension wrench has a handle extension that is equal in length to the original handle.

What should the torque setting be?

• half

• double

• quarter

• left the same

The predominant force acting on the drive shaft of a vehicle is an example of

• compression.
• tension.
• torsion.
• shear.

What is the most important intention of occupational health and safety (OH&S) standards in the workplace?

• to have an independent officer in workplace safety
• to make employers responsible for employee safety
• to make employees responsible for safety in the workplace
• to protect the safety, health and welfare of everyone in the workplace

Bolts have a recommended torque setting.

Which one of the following gives the best description of what a torque setting indicates?

• how tight the bolt should be

• how much the bolt can be stretched

• the amount of resistance between the bolt and the component

• how much pressure can be applied to the bolt before it breaks

The gears shown above are referred to as

• spur gears.

• crown gears.

• a rack and pinion.

• an epicycle gear set.

Solar cells operate by converting

• heat to electrical energy.
• light to electrical energy.
• biomass to electrical energy.
• thermal energy to electrical energy.

Which one of the following statements about the law of conservation of energy is most accurate?

• Energy can be created but not destroyed.
• Energy is created and changed from one form into another.
• Energy is destroyed when changed from one form into another.
• Energy is not created or destroyed but changed from one form into another.

What is the force required to balance the system shown above?

• 200 N

• 300 N

• 600 N

• 1200 N