Engineering quick practice

Question 1 of 10

A length is measured as 25.0 ± 0.1 cm. What is the percentage uncertainty?

Question 2 of 10

Triangles are used in trusses and bridges because they

Question 3 of 10

Geothermal energy comes from

Question 4 of 10

The moment of a 20 N force acting 0.5 m from a pivot is

Question 5 of 10

LED bulbs are more energy-efficient than incandescent bulbs because they

Question 6 of 10

The branch of engineering that designs processes to turn raw materials into products such as fuels and fertilisers is

Question 7 of 10

A pulley system lifts 800 N with 250 N effort and has VR 4. Its efficiency is

Question 8 of 10

A pipe narrows from 0.04 m² to 0.01 m². If speed in the wide part is 2 m/s, speed in the narrow part is

Question 9 of 10

Brainstorming in the design process is used to

Question 10 of 10

Ghana's Bui Dam on the Black Volta generates