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- Excess concentrated sulphuric VI acid was mixed with pieces of dry wood as shown.(Solved)
Excess concentrated sulphuric VI acid was mixed with pieces of dry wood as shown.
a) State the observation made in the tube.
b) When the reaction was complete, the mixture was heated gently, then strongly and set up adjusted as shown below.
State and explain the observation made on acidified potassium chromate VI solution.
Date posted: September 18, 2019.
- State four physical checks that need to be carried on a car battery.(Solved)
State four physical checks that need to be carried on a car battery.
Date posted: September 18, 2019.
- A person met a lion as he walked along a forest path.
(i) Name the hormone that was secreted in his bloodstream and state its source....(Solved)
A person met a lion as he walked along a forest path.
(i) Name the hormone that was secreted in his bloodstream and state its source.
(ii) What is the effect of the hormone in his:
(a) Circulatory system.
(b) Respiratory system.
Date posted: September 18, 2019.
- State one cause of each the following excessive tire tread wear patterns .
i) feathered edge
ii) shoulder wear(Solved)
State one cause of each the following excessive tire tread wear patterns .
i) feathered edge
ii) shoulder wear
Date posted: September 18, 2019.
- Differentiate between friction and antifriction bearings. Give one example of each type.(Solved)
Differentiate between friction and antifriction bearings. Give one example of each type.
Date posted: September 18, 2019.
- Where is the hormone thyroxin produced?(Solved)
Where is the hormone thyroxin produced?
Date posted: September 18, 2019.
- State one use of each of the following tools
a) Piston ring compressor
b) Micrometers
c) stethoscope
d) Compression gauge
(Solved)
State one use of each of the following tools
a) Piston ring compressor
b) Micrometers
c) stethoscope
d) Compression gauge
Date posted: September 18, 2019.
- The following processes occur during stages of meiosis. Indicate the stage in which they occur.(Solved)
The following processes occur during stages of meiosis. Indicate the stage in which they occur.
(i) Pairing of chromosomes.
(ii) Centromere divides.
(iii) Bivalent at the equator.
Date posted: September 18, 2019.
- For each of the following components state two measurements which should be taken during inspection.
a) Crankshaft
b) Piston rings(Solved)
For each of the following components state two measurements which should be taken during inspection.
a) Crankshaft
b) Piston rings
Date posted: September 18, 2019.
- State two reasons for alloying metals.(Solved)
State two reasons for alloying metals.
Date posted: September 18, 2019.
- Explain the following terms as used in the suspension system.
a) sprung weight
b) un sprung weight(Solved)
Explain the following terms as used in the suspension system.
a) sprung weight
b) un sprung weight
Date posted: September 18, 2019.
- Differentiate between live and dead axle.(Solved)
Differentiate between live and dead axle.
Date posted: September 18, 2019.
- Arrange the following personnel training levels in the correct order starting with the highest, (2marks)
Technician, Craftsman, Technologist, Artisan(Solved)
Arrange the following personnel training levels in the correct order starting with the highest, (2marks)
Technician, Craftsman, Technologist, Artisan
Date posted: September 18, 2019.
- List three major components of the diesel fuel system.(Solved)
List three major components of the diesel fuel system.
Date posted: September 18, 2019.
- Cell V in the diagram below went through the 2nd meiotic division. The results were as in the gamete cells W and X.(Solved)
Cell V in the diagram below went through the 2nd meiotic division. The results were as in the gamete cells W and X.
i) Name the type of mutation demonstrated in the diagrams.
ii) Supposing gamete X fused with a normal gamete during fertilization, name a disorder in humans resulting from such a condition.
Date posted: September 18, 2019.
- The cell convention for and electrochemical cell is shown below.(Solved)
The cell convention for and electrochemical cell is shown below.
(a) Name two substances that can be used as electrolytes in the above cell.
(b) Which of the electrodes is the negative in the cell above ? Explain.
Date posted: September 18, 2019.
- Table 3 below shows a bill of materials used to construct a stabilized dc supply.(Solved)
Table 3 below shows a bill of materials used to construct a stabilized dc supply.
Draw a circuit diagram of the power supply.
Date posted: September 18, 2019.
- The diagram below represents the process that brings about blood clotting.(Solved)
The diagram below represents the process that brings about blood clotting.
a) Name the substances A and B.
b) Name one source of calcium ions in the diet.
c) Name one more other role of calcium in the body.
d) Name the blood cells that are involved in blood clotting.
e) List down three structural adaptations of the red blood cells to their functions.
Date posted: September 18, 2019.
- Draw a labelled circuit diagram of a PNP transistor amplifier in common base configurations.
(Solved)
Draw a labelled circuit diagram of a PNP transistor amplifier in common base configurations.
Date posted: September 18, 2019.
- Draw a line diagram of a national grid system showing typical voltages at each stage.(Solved)
Draw a line diagram of a national grid system showing typical voltages at each stage.
Date posted: September 18, 2019.
- Use the nitrogen cycle below to answer the questions that follow.(Solved)
Use the nitrogen cycle below to answer the questions that follow.
a) Name the processes represented by
i) G
ii) Y
iii) K
b) Name the group of organisms that cause processes
i) C
ii) J
iii) L
c) Name the state in which nitrogen exist in
i) Plant tissue
ii) Atmosphere
Date posted: September 18, 2019.
- The table below shows properties of some chlorides. Study it and answer the questions that follow.(Solved)
The table below shows properties of some chlorides. Study it and answer the questions that follow.
a) Explain the high melting and boiling points of sodium chloride.
b) Write an equation for the reaction between PC15 and water.
c) Draw the dot (•) and cross (x) diagram to show bonding in NaCl.
Date posted: September 18, 2019.
- Give three reasons why a verification of polarity test is carried out in a completed domestic installation.(Solved)
Give three reasons why a verification of polarity test is carried out in a completed domestic installation.
Date posted: September 18, 2019.
- List three metal parts that are exempted from earthing in a domestic installation.(Solved)
List three metal parts that are exempted from earthing in a domestic installation.
Date posted: September 18, 2019.
- Figure 5 shows an RLC circuit.(Solved)
Figure 5 shows an RLC circuit.
Calculate the:
i. Inductive reactance
ii. Capacitive reactance
iii. Circuit impedance
iv. Circuit current
v. Power dissipated in the circuit
Date posted: September 18, 2019.
- Pea seedlings were treated as follows;
Seedling A - Coleoptiles tip was cut off, metal block placed, then tip placed back.
Seedling B - Coleoptiles tip was...(Solved)
Pea seedlings were treated as follows;
Seedling A - Coleoptiles tip was cut off, metal block placed, then tip placed back.
Seedling B - Coleoptiles tip was cut off, agar block placed then tip placed back.
Seedling C - Was left intact.
The seedlings A, B and C were placed in dark box with a small hole at one side as illustrated in the diagram below;
a) State what was being investigated in the set up above.
b) Using diagrams illustrate how the seedlings A, B and C appear after 48 hours.
c) Explain the results in (b) above;
Date posted: September 18, 2019.
- State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
(Solved)
State the phase relationship between current and voltage in circuits that are purely:
i. Resistive
ii. Inductive
Date posted: September 18, 2019.
- A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current(Solved)
A5000/500V, 10KVA ideal single phase transformer has 40 turns on the secondary. Calculate:
I. primary turns
II. primary full load current
III. secondary full load current
Date posted: September 18, 2019.
- Outline three assumptions made in order to consider a transformer as an ideal machine.(Solved)
Outline three assumptions made in order to consider a transformer as an ideal machine.
Date posted: September 18, 2019.
- In an experiment using germinating seeds, it was found that 18cm3 of carbon (IV) oxide was released while 17.6cm3 of oxygen was used.
a) Calculate the...(Solved)
In an experiment using germinating seeds, it was found that 18cm3 of carbon (IV) oxide was released while 17.6cm3 of oxygen was used.
a) Calculate the respiratory quotient (RQ).
b) State the type of respiration occurring.
c) What is the likely respiratory substrate?
Date posted: September 18, 2019.