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Understand how to apply  scientific principles within  mechanical services engineering Level 2 NVQ Diploma in Plumbing and...
Which one of the following is the freezing point of water? <ul><li>0ºC. </li></ul><ul><li>32ºC. </li></ul><ul><li>75ºC. </...
A change of state in water takes place at which of the following temperatures? <ul><li>25ºC. </li></ul><ul><li>50ºC. </li>...
Water is at its  maximum  density at which one of the following temperatures? <ul><li>0ºC. </li></ul><ul><li>4ºC. </li></u...
What is the intensity of pressure acting on the inlet to the 15 mm tap shown in the following diagram? <ul><li>5.88kPa. </...
Which one of the following pipes of equal length will create the greatest resistance to the flow of water?   <ul><li>A 22m...
Which one of the following will cause siphonage to occur from the upper container to the lower container in the following ...
Which one of the following types of device is used to take temperature measurements of pipe surfaces when commissioning a ...
What is the amount of heat energy required to raise 200 litres of water from  10ºC to 60ºC, if the specific heat capacity ...
Conduction occurs by  <ul><li>heat travelling in straight lines through air </li></ul><ul><li>heat travelling through a so...
Which method of heat transfer is shown in the following diagram by water being heated in the boiler, circulating through  ...
Which one of the following materials is the  best  conductor of heat? <ul><li>Copper. </li></ul><ul><li>Lead. </li></ul><u...
Which one of the following values reflects a neutral pH? <ul><li>1. </li></ul><ul><li>4. </li></ul><ul><li>7. </li></ul><u...
Lime-scale in hot water is caused by  <ul><li>soft water </li></ul><ul><li>temporarily hard water </li></ul><ul><li>perman...
The rate of electrolytic corrosion of metallic materials in a plumbing system is affected by which one of the following? <...
The following diagram shows a type of metallic roof joint which incorporates a gap in the joint design. What is the purpos...
Which one of the following is a ferrous metal? <ul><li>Copper. </li></ul><ul><li>Brass. </li></ul><ul><li>Low carbon steel...
Which one of the following identifies the coating that forms on the surface of sheet lead and provides a protective coatin...
By how much will a 10 metre length of gutter expand when heated from 15ºC to 30ºC, if the coefficient of linear expansion ...
The SI unit for measuring electrical current is <ul><li>watt </li></ul><ul><li>joule </li></ul><ul><li>ohm </li></ul><ul><...
What is the typical size of fuse that will be required for an 1100 watt portable appliance fed by a 240 volt supply? <ul><...
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City & guilds nvq diploma in plumbing - apply scientific principles

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City & guilds nvq diploma in plumbing - apply scientific principles

  1. 1. Understand how to apply scientific principles within mechanical services engineering Level 2 NVQ Diploma in Plumbing and Domestic Heating
  2. 2. Which one of the following is the freezing point of water? <ul><li>0ºC. </li></ul><ul><li>32ºC. </li></ul><ul><li>75ºC. </li></ul><ul><li>100ºC. </li></ul>
  3. 3. A change of state in water takes place at which of the following temperatures? <ul><li>25ºC. </li></ul><ul><li>50ºC. </li></ul><ul><li>75ºC. </li></ul><ul><li>100ºC. </li></ul>
  4. 4. Water is at its maximum density at which one of the following temperatures? <ul><li>0ºC. </li></ul><ul><li>4ºC. </li></ul><ul><li>25 ºC. </li></ul><ul><li>52 ºC. </li></ul>
  5. 5. What is the intensity of pressure acting on the inlet to the 15 mm tap shown in the following diagram? <ul><li>5.88kPa. </li></ul><ul><li>19.18kPa. </li></ul><ul><li>39.24kPa. </li></ul><ul><li>88.29kPa. </li></ul>
  6. 6. Which one of the following pipes of equal length will create the greatest resistance to the flow of water?   <ul><li>A 22mm pipe which reduces down to 15mm for a quarter of its length. </li></ul><ul><li>A 15mm pipe which contains 4 machine bends. </li></ul><ul><li>A 15mm pipe which contains 2 machine bends and 2 elbows. </li></ul><ul><li>A 15mm pipe which contains 4 elbows. </li></ul>
  7. 7. Which one of the following will cause siphonage to occur from the upper container to the lower container in the following diagram? <ul><li>Suction pressure at point B. </li></ul><ul><li>Positive pressure at point B. </li></ul><ul><li>Suction pressure at point A. </li></ul><ul><li>Atmospheric pressure at points A and B. </li></ul>
  8. 8. Which one of the following types of device is used to take temperature measurements of pipe surfaces when commissioning a central heating system? <ul><li>Cylinder thermostat. </li></ul><ul><li>Room thermostat. </li></ul><ul><li>Differential digital thermometer. </li></ul><ul><li>Multi-meter. </li></ul>
  9. 9. What is the amount of heat energy required to raise 200 litres of water from 10ºC to 60ºC, if the specific heat capacity of water is 4.2 kJ/kg/ºC? <ul><li>42000kJ. </li></ul><ul><li>50400kJ. </li></ul><ul><li>84000kJ. </li></ul><ul><li>96000kJ. </li></ul>
  10. 10. Conduction occurs by <ul><li>heat travelling in straight lines through air </li></ul><ul><li>heat travelling through a solid material </li></ul><ul><li>heat transfer by a chemical reaction </li></ul><ul><li>heat transfer by motion of a fluid. </li></ul>
  11. 11. Which method of heat transfer is shown in the following diagram by water being heated in the boiler, circulating through pipe A to the cylinder and returning to the boiler for re-heating by pipe B ? <ul><li>Radiation. </li></ul><ul><li>Conduction. </li></ul><ul><li>Convection. </li></ul><ul><li>Thermal relaying. </li></ul>
  12. 12. Which one of the following materials is the best conductor of heat? <ul><li>Copper. </li></ul><ul><li>Lead. </li></ul><ul><li>Low carbon steel. </li></ul><ul><li>Iron. </li></ul>
  13. 13. Which one of the following values reflects a neutral pH? <ul><li>1. </li></ul><ul><li>4. </li></ul><ul><li>7. </li></ul><ul><li>11. </li></ul>
  14. 14. Lime-scale in hot water is caused by <ul><li>soft water </li></ul><ul><li>temporarily hard water </li></ul><ul><li>permanently hard water </li></ul><ul><li>distilled water. </li></ul>
  15. 15. The rate of electrolytic corrosion of metallic materials in a plumbing system is affected by which one of the following? <ul><li>The melting point of the metals. </li></ul><ul><li>Their position in the electro-chemical series. </li></ul><ul><li>The relative density of the metals. </li></ul><ul><li>The rate of thermal expansion of the metals. </li></ul>
  16. 16. The following diagram shows a type of metallic roof joint which incorporates a gap in the joint design. What is the purpose of the gap?   <ul><li>To reduce shrinkage of the material. </li></ul><ul><li>To prevent capillary action. </li></ul><ul><li>To allow thinner metal to be used. </li></ul><ul><li>To add insulation to the roof covering. </li></ul>
  17. 17. Which one of the following is a ferrous metal? <ul><li>Copper. </li></ul><ul><li>Brass. </li></ul><ul><li>Low carbon steel. </li></ul><ul><li>Lead. </li></ul>
  18. 18. Which one of the following identifies the coating that forms on the surface of sheet lead and provides a protective coating? <ul><li>Sulphate. </li></ul><ul><li>Patina. </li></ul><ul><li>Galina. </li></ul><ul><li>Surface sheen. </li></ul>
  19. 19. By how much will a 10 metre length of gutter expand when heated from 15ºC to 30ºC, if the coefficient of linear expansion of plastic is 0.00018? <ul><li>13mm. </li></ul><ul><li>27mm. </li></ul><ul><li>58mm. </li></ul><ul><li>107mm. </li></ul>
  20. 20. The SI unit for measuring electrical current is <ul><li>watt </li></ul><ul><li>joule </li></ul><ul><li>ohm </li></ul><ul><li>ampere. </li></ul>
  21. 21. What is the typical size of fuse that will be required for an 1100 watt portable appliance fed by a 240 volt supply? <ul><li>1 amp. </li></ul><ul><li>3 amp. </li></ul><ul><li>5 amp. </li></ul><ul><li>13 amp. </li></ul>

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