Basic Physics/Technology (JSS 2) 3rd term Examination

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Welcome to your Basic Physics/Technology (JSS 2) 3rd term Examination

1. Which of the following is a resistive force ?

2. All of these causes friction, EXCEPT

3. A pipeline fitting component used to control the flow of water or blockage is called

4. One of these is NOT a style of tap

5. Materials used in making tap are as follows, EXCEPT

6. Density is an upward force.

7. The symbol of density is pronounced as

8. The SI unit of pressure is

9. The point of the resisting force in a lever is called

10. A machine use to hold materials together is called

11. Types of belt are as follows, EXCEPT

12. One of these is NOT among the advantages of belt drive

13. The engagement of gears is called ________

14. The ratio of number of teeth of output to input gear is called

15. Sumo is also known as

16. The name of the French scientist that discovered the transmissibility of pressure is

17. One of these is NOT among the hand tools used for site preparation.

18. The tool used in setting out a building when greater accuracy is required called

19. The digging of the soil for foundation is known as

20. Extermination of termites and their nest is one of the things you do when

Subjective (Answer All)

1. A very powerful machine which can push down almost any obstacle on its way is called _________________.

2. The formula for finding the efficiency of a machine is ________________.

3. Another name for water supply is ___________.

4. Pressure is simply defined as ________________.

5. When effort balances a load, the ratio of the load to the effort is called ________________.

6. During gearing the gears are divided into two, namely; ____________ and __________

7. One difference between chain drive and belt drive that I know is _____________.

8. Chain drive are made up of _____________ and _____________.

9. An example of complex machine is ________________.

10. Grease and gases are among types of _________________.

Theory (Answer Any 4)

1. Define the following terms: (a)Friction (b)Simple machine (c)Lubrication (d)Pneumatic machines (e)Taps

2a. Name two ways to reduce friction.

2b. A gear of 25teeth with rotational speed of 12rpm. The gear drives another gear with 15teeth. Determine the speed of the 15teeth hear.

3a. List four main components of a hydraulic and pneumatic machines.

3b. State the uses of two.

4a. State the principle of transmissibility..

4b. A machine has a velocity ratio of 5. It requires a 50kg weight to overcome a 200kg weight. What is the efficiency?

5a. How much force will a body of mass 110kg possess? (Take acceleration due gravity as 10m/s²)

5b. Calculate the pressure exerted on the ground by a person with force of 1176N covering a sectional area of 49m³.

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