Systems Engineering Exam (2017)

Eye protection is required when performing tasks such as using a cold chisel, a bench grinder or a drill. Under what circumstances is eye protection not required when using a cold chisel, a bench grinder or a drill?

• when the user can turn their head away and not look
• when wearing sunglasses with an acrylic lens
• when wearing prescription glasses
• when wearing a clear face shield

When using a bench grinder, it is best practice to

• keep the wheel cool by spraying it with water.
• make sure someone else is watching from close by.
• move the work across the wheel and not use the wheel’s side face.
• stand in front of the wheel and watch it gain speed to ensure it is running true.

Which type of motion would best describe the lever’s action in the diagram above?

• oscillating

• elliptical

• rotary

• linear

In the pulley system shown above, the drive pulley turns in a clockwise direction. How many other pulleys will move in the same direction?

• 3

• 4

• 5

• 8

Which type of gear can be used to convert rotary motion into linear motion?

• spur
• bevel
• worm
• rack and pinion

Newton’s third law states that

• for every action there is an equal but opposite reaction.
• the force on an object is given by the mass times acceleration.
• a body stays at rest or in constant motion unless acted on by another force.
• the energy of an object is given by the mass times the velocity squared, then divided by two.

A model steam train has a mass of 400 kg and has a force of 200 N applied to it. The train starts from rest, has a constant acceleration and covers 40 m in 12.6 s. The work done by the steam engine in the train is

• 80 kJ
• 8 kJ
• 5 J
• 2 J

A model steam train has a mass of 400 kg and has a force of 200 N applied to it. The train starts from rest, has a constant acceleration and covers 40 m in 12.6 s. The power output of the steam engine in the train is

• 10 W
• 50 W
• 504 W
• 635 W

In the gear system shown above, Gear 1 is the driver gear, Gear 4 is the driven gear, and Gear 2 and Gear 3 are joined together.

What is the gear ratio of the system?

• 1:3

• 1:2

• 2:1

• 3:1

In the diagram shown above, if Piston A has a force of 360 N acting down on it, what is the force of Piston b?

• 3240 N

• 1080 N

• 360 N

• 120 N