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Senior High School · WASSCE style

Robotics

Question 1

1Which change makes a robot less likely to tip over?

Easy

A. adding weight to the top B. making its base narrower C. lowering its centre of gravity and widening its base D. raising its heaviest parts

Question 2

2A worm gear is often used in a robot arm joint because it

Medium

A. changes motion into sound B. gives a large speed reduction and resists being turned back by the load C. spins the output faster than the motor D. has no teeth

Question 3

3A robot wheel of radius 0.2 m spins at 5 rad/s. What is the robot's linear speed?

Medium

A. 25 m/s B. 0.04 m/s C. 1 m/s D. 5.2 m/s

Question 4

4A cam mechanism converts

Easy

A. heat into light B. light into motion C. sound into motion D. rotary motion into reciprocating motion

Question 5

5A rack and pinion converts

Easy

A. rotary motion into linear motion B. sound into motion C. linear motion into heat D. light into rotation

Question 6

6A gear ratio of 3 : 1 (driven : driver teeth) makes the output

Medium

A. the same speed B. slower but with more torque C. stop D. faster with less torque

Question 7

7A cam and follower changes rotary motion into

Easy

A. electrical energy B. reciprocating (up-and-down) motion C. faster rotary motion D. sound

Question 8

8A robot with larger wheels travels further for each wheel turn than one with smaller wheels because

Easy

A. larger wheels spin faster B. larger wheels are lighter C. each turn covers one circumference, and a larger wheel has a larger circumference D. smaller wheels slip more

Question 9

9A robot moves 12 m east in 8 s. What is its average velocity?

Easy

A. 0.67 m/s east B. 1.5 m/s east C. 1.5 m/s west D. 96 m/s east

Question 10

10For moving over rough, uneven ground, which drive is usually better than small wheels?

Easy

A. legs or tracks B. a single castor C. skids D. smaller wheels

Answered0 / 10

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Unanswered questions count as wrong. Theory questions are not scored.

Demo questions written by Otisam in the style of the WASSCE. They are not WAEC past questions.

Past questions, worked solutions and curriculum-mapped study material for JHS and SHS students and teachers in Ghana.

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