Electricity Test 3

25 Questions | Total Attempts: 57

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Electricity Test 3

E TEST MILLS OPERATIONS PLANTATION UPSTREAM


Questions and Answers
  • 1. 
    What is the purpose of the indentation (a cut or mark) as shown in the diagram below?  
    • A. 

      To indicate clearly the position of open and close of the blowdown valve.

    • B. 

      To allow for easy assembly of the valve during repairs.

    • C. 

      To identify the maximum allowable working pressure of the valve

    • D. 

      To prevent boiler explosion.

  • 2. 
    Press cake must have sufficient drop in the depericarper separating column for the nuts and fibres to be separated. From the diagram below, what is the minimum height ‘b’ required for an efficient separation?
    • A. 

      B = a.

    • B. 

      B = 2a.

    • C. 

      B = 3a.

    • D. 

      B = 4a.

  • 3. 
    In the clarification of raw water, the common treatment process is the Soda- Alum treatment. Therefore, based on the diagram below, what is the amount of alum  to be added into the chemical mixing tank if jar test established that 35ppm of AL2(SO4)3.18H2O is required?
    • A. 

      100kg

    • B. 

      95kg

    • C. 

      84kg

    • D. 

      65kg

  • 4. 
    One of the steps in softener regeneration is backwashing. There are two reasons for the backwashing, what are they?
    • A. 

      The reverse flow of water lifts and expands the resin bed and enhances proper brine distribution.

    • B. 

      The reverse flow clears the slots on the PatCandy nozzles for better filtration and smooth flow of water.

    • C. 

      The reverse flow helps to reduce in-coming water hardness and reduce the usage of salt.

    • D. 

      The reverse flow creates better backpressure in the softener and longer service cycle

  • 5. 
    • A. 

      There are only four sets of stirring arms instead of five.

    • B. 

      The expeller arms rotate in the opposite direction to the stirring arms.

    • C. 

      There are no steam nozzles, steel baffles and bottom drainage.

    • D. 

      There is no pendulum to indicate the level of Mass-Passing-Digester.

  • 6. 
    One of the following statements is incorrect. Which one is it?
    • A. 

      Always add strong concentrated acid to water slowly and mix well.

    • B. 

      Dichromate solution is a strong cleaning agent.

    • C. 

      Potassium permanganate solution is good for cleaning glassware.

    • D. 

      Hexane is not easily flammable.

  • 7. 
    • A. 

      96.00%

    • B. 

      93.75%

    • C. 

      90.15%

    • D. 

      92.10%

  • 8. 
    Diagram below shows a cut-out view of a mechanical type steam trap. What should the correct position of the trap be when installed?
    • A. 

      ‘S’ should be on the top side.

    • B. 

      ‘I’ should be on the top side.

    • C. 

      ‘M’ should be on the top side.

    • D. 

      ‘E’ should be on the top side.

  • 9. 
    Referring to the steriliser diagram shown below, one important safety component is missing. Without this component, the steriliser is not supposed to be run. What is that missing component? Note: The steriliser is equipped with a safety valve at its rear (not shown).
    • A. 

      There are no tell-tale holes.

    • B. 

      There is no proper support for the safety bleeding valve assembly.

    • C. 

      There is no PMT serial number as issued by the department of occupational safety and health.

    • D. 

      There is no steam pressure gauge assembly.

  • 10. 
    When an electronic balance is not in use, it is best to keep the balance window close to avoid entry of dust. It is also suggested that a beaker of dry silica gel be placed inside the balance. What is the purpose of the silica gel?
    • A. 

      To ensure objects to be weighed come to the same temperature as the balance before weighing.

    • B. 

      To absorb moisture in the atmosphere and keep the balance dry.

    • C. 

      To ensure proper calibration of the balance at all times.

    • D. 

      It serves as a counterweight.

  • 11. 
    If an effluent pond is deprived of oxygen with the pH kept at 6.8 to 7.5 and the temperature is maintained between 35oC to 45oC, what are the most likely primary micro-organisms to be present in the pond?
    • A. 

      Bacillus Amyloliquefaciens.

    • B. 

      Pediococcus Acidilactici.

    • C. 

      Mesophiles.

    • D. 

      Thermophiles.

  • 12. 
    What is the advantage of hydro-cyclone separators over clay bath separators?
    • A. 

      Only clean water is required to bring about good separation of palm kernels and shells.

    • B. 

      Low power consumption

    • C. 

      There is no necessity to monitor the S.G of the separating medium used.

    • D. 

      Minimum supervision.

  • 13. 
    In running a hydro-cyclone separator, the best possible results would be obtained if the pressure differential between P1 and P2 (refer to diagram) is correctly maintained. What is the required pressure differential (note: pressure differential is the difference of P1 and P2)?
    • A. 

      [inlet pressure, P1 - outlet pressure,P2] is less than 50% of P1

    • B. 

      [outlet pressure, P2 - inlet pressure,P1] is less than 50% of P2

    • C. 

      [inlet pressure, P1 - outlet pressure,P2] is less than 50% of P2

    • D. 

      None of the above.

  • 14. 
    • A. 

      122 minutes

    • B. 

      124 minutes

    • C. 

      126 minutes

    • D. 

      128 minutes

  • 15. 
    Anaerobic digestion is a process which involves the breakdown of almost all kinds of organic matter by concerted action of a wide range of micro-organisms in the absence of oxygen or other strong oxidising chemicals. There are four successive stages in the anaerobic process. State the stages in sequence.
    • A. 

      Acetogenesis →Hydrolysis → Acidogenesis →Methanogenesis

    • B. 

      Hydrolysis → Methanogenesis → Acidogenesis → Acetogenesis.

    • C. 

      Methanogenesis → Acetogenesis → Acidogenesis → Hydrolysis.

    • D. 

      Hydrolysis → Acidogenesis → Acetogenesis → Methanogenesis

  • 16. 
    What is the speed of a rotary thresher drum as shown in the diagram below if the smallest diameter of the fruit bunch (measured over the thickest part) received by the mill is 30 cm.
    • A. 

      23 revolutions per minute.

    • B. 

      20 revolutions per minute.

    • C. 

      25 revolutions per minute.

    • D. 

      26 revolutions per minute.

  • 17. 
    Effective from 1 Jul-04, MPOA (Malaysian Palm Oil Association) and PORAM (Palm Oil Refiners Association of Malaysia) have reached a consensus to incorporate DOBI into the Domestic Sales Contract. What is the least value of DOBI of CPO sold that does not incur any compensation to the buyer?
    • A. 

      2.30

    • B. 

      2.31

    • C. 

      2.32

    • D. 

      2.33

  • 18. 
    The dotted-lines shown below encompass either in full or part of a diagram. Which of the dotted-line boxes is the diagram of a steam boiler?
    • A. 

      Box A – A – A – A

    • B. 

      Box B – B – B – B

    • C. 

      Box C – C – C – C

    • D. 

      Box D – D – D – D

    • E. 

      None of the above.

  • 19. 
    What is the required solid interface height (%) to be maintained over the anaerobic digester pond/tank operational height?
    • A. 

      40%

    • B. 

      30%

    • C. 

      20%

    • D. 

      10%

  • 20. 
    One purpose of sterilisation of palm fruits is to coagulate (becomes thick and partly solid) the albuminous substances. Once gelled, the substances should be retained in the press fibres as far as possible so as not to act as emulsifiers of the crude palm oil at the clarification station. What is the required minimum temperature to effectively coagulate the albuminous matter?
    • A. 

      95oC

    • B. 

      140oC

    • C. 

      100oC

    • D. 

      80oC

  • 21. 
    The sampling of despatch oil is done on every oil tanker before the tanker manholes are sealed. By referring to the diagram below, which manhole does the oil sample taken from?
    • A. 

      Front manhole ‘A’.

    • B. 

      Middle manhole ‘B’.

    • C. 

      Rear manhole ‘C’

    • D. 

      Discharge valve ‘D’

  • 22. 
    What is the safe maximum tripping speed of a turbine operating at 2500 rpm?
    • A. 

      2 650 rpm

    • B. 

      2 750 rpm

    • C. 

      2 850 rpm

    • D. 

      2 950 rpm

  • 23. 
    What is volatile matter (VM)?
    • A. 

      Matter that vapourise at temperature below -30oC.

    • B. 

      Matter that vapourise at temperature below 30oC.

    • C. 

      Matter that vapourise at temperature below -10oC.

    • D. 

      Matter that vapourise at temperature below 10oC.

  • 24. 
    What is the definition of steam boiler under the Factories and Machinery Act, 1967?
    • A. 

      Any vessel in which, for any purpose, steam is generated under pressure greater than atmospheric pressure and, include economiser used to heat water being fed to the boiler and, any superheater used for heating steam and any pipe and fittings connected there to.

    • B. 

      Any closed vessel in which, for any purpose, steam is generated under pressure and, include economiser used to heat water being fed to the boiler and, any superheater used for heating steam and any pipe and fittings connected there to.

    • C. 

      Any closed vessel in which, for any purpose, steam is generated under pressure greater than atmospheric pressure and, include economiser used to heat water being fed to the boiler and, any superheater used for heating steam and any pipe and fittings connected there to.

    • D. 

      Any closed vessel in which, for any purpose, steam is generated under pressure greater than absolute pressure and, include economiser used to heat water being fed to the boiler and, any superheater used for heating steam and any pipe and fittings connected there to.

  • 25. 
    From the following mill data below, how you know that the bulk of the fruit bunches received is not of the dura variety.
    • A. 

      Dura bunch has thin mesocarp which constitutes for NOS% of at least 60%.

    • B. 

      The nut of dura bunch has thick shell therefore broken nuts should be more than 20%.

    • C. 

      Generally dura bunch has thin mesocarp and nut of thick shell. On weight-to-weight ratio, a dura palm fruit would have lesser fibre than nut.

    • D. 

      The low OLWB% shows that the FFB are not of the dura variety.