Truck Crane Cal-1 Training Test Paper

50 Questions | Total Attempts: 49

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Truck Crane Cal-1 Training Test Paper

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Questions and Answers
  • 1. 
    The Engine power transform into hydraulic power is equal to?
    • A. 

      Pressure x Area

    • B. 

      Force x Area

    • C. 

      Pressure x Displacement

    • D. 

      Pressure x Torque

  • 2. 
     The given picture is which  type of valve
    • A. 

      Manually operated 3 positions 4 ways, spring centred, open centred. 

    • B. 

      Manually operated 3 positions 4 ways, spring centred, close centred.   

    • C. 

      Manually operated 3 positions 4 ways, off set, open centred.   

    • D. 

      Manually operated 3 positions 4 ways, off set, close centred.

  • 3. 
    In STC 250 crane outrigger horizontal cylinder is protected against throwing out in driving mode.
    • A. 

      Simple check valve

    • B. 

      Controlled check valve

    • C. 

      Counter balance valve

    • D. 

      Hydraulic lock

  • 4. 
    Which reason will cause no luffing down?
    • A. 

      Over Load

    • B. 

      Over moment

    • C. 

      One out rigger pressure is zero

    • D. 

      Either 1 & 2 

  • 5. 
    Flow through an orifice is controlled by?
    • A. 

      Size of orifice

    • B. 

      Temperature of the oil

    • C. 

      Pressure difference across the orifice

    • D. 

      All of the above

  • 6. 
    The bypass valve associated with oil cooler opens when?
    • A. 

      The oil is very thick at very cold temperature.

    • B. 

      Cooler tubes are chocked.

    • C. 

      When the flow rate is less.

    • D. 

      Either 1 or 2

  • 7. 
    The characteristics of variable displacement pump is? 
    • A. 

      Flow depends on engine speed

    • B. 

      Flow depends on swash plate angle.

    • C. 

      Flow depends on 1 & 2

    • D. 

      None

  • 8. 
    Oil is used in hydraulic system for?
    • A. 

      Power transmission.

    • B. 

      Cleaning & Sealing.

    • C. 

      Lubrication & cooling.

    • D. 

      All of the above.

  • 9. 
    Type of valve used to regulate the flow?
    • A. 

      Main relief valve.

    • B. 

      Variable orifice.

    • C. 

      Fixed orifice.

    • D. 

      Any one

  • 10. 
    On the page of LMI working condition setting, we can set which parameter ?
    • A. 

      Boom length.

    • B. 

      Wire rope fall.

    • C. 

      Hook model

    • D. 

      All

  • 11. 
    In Sany truck crane 04 section boom single cylinder rope telescopic system_
    • A. 

      2nd section telescope by cylinder and 3rd & 4th section by rope and drum mechanism.

    • B. 

      Fist 2nd section than 3rd and 4th by cylinder only.

    • C. 

      Simultaneously 2nd section by cylinder and 3rd & 4th by rope mechanism. 

    • D. 

      Both 1 & 3

  • 12. 
    In a hydraulic system pressure is caused by ?
    • A. 

      Restriction to the flow.

    • B. 

      Blockage in the pipe line.

    • C. 

      Induced load.

    • D. 

      All

  • 13. 
    In Sany truck crane 05 section boom to cylinder rope telescopic system;
    • A. 

      2nd section telescope by cylinder 1and 3rd ,4th and 5th section by rope mechanism .

    • B. 

      2nd and 3rd section by cylinder 1 and 2 respectively and 4th and 5th  by rope mechanism simultaneously by cyl-2.

    • C. 

      2nd section extended by cyl -1 and rest  by cyl -2.

    • D. 

      Section 2 and 3 by cyl -1 and section 3 ,4 and 5 by cyl -2.

  • 14. 
    Use of 2nd length sensor in 5 section boom truck crane is?
    • A. 

      To measure the length of 3rd4th and 5th section.

    • B. 

      To measure the length of 2nd  section only.

    • C. 

      2nd length section is optional.

    • D. 

      2nd is stand by for 1st sensor.

  • 15. 
    In a single cylinder cross-pin boom telescopic mechanism system;
    • A. 

      1 cyl can control all boom section extension and retraction.

    • B. 

      2nd section by cyl and 3rd, 4th and 5th by rope.

    • C. 

      Either A and B.

    • D. 

      None.

  • 16. 
    What I the line pull of STC 1000 truck crane if crane have max provision of 10 no. of fall?
    • A. 

      5 ton.

    • B. 

      10 ton.

    • C. 

      12.5 ton.

    • D. 

      8 ton.

  • 17. 
    The main reason for hydraulic tank in an hydraulic system is to ?
    • A. 

      Hold enough fluid for the circuit.

    • B. 

      Decelerate the returned fluid .

    • C. 

      To clean the fluid.

    • D. 

      All.

  • 18. 
    The purpose of one way restrictor in slewing brake circuit is?
    • A. 

      To apply the brake quickly .

    • B. 

      To apply the brake slowly.

    • C. 

      To release the brake quickly.

    • D. 

      Apply and release slowly.

  • 19. 
    The purpose of free swing switch in swing circuit is to ?
    • A. 

      Apply the brake in swing motor.

    • B. 

      Connect port A and B.

    • C. 

      Release the brake.

    • D. 

      2 and 3 both.

  • 20. 
    In variable torque/ speed hydraulic motor when servo piston is at Vgmax?
    • A. 

      Only bigger chamber will receive the oil.

    • B. 

      Both the chamber or servo piston will receive the oil.

    • C. 

      Only small chamber will receive the oil.

    • D. 

      All of the above.

  • 21. 
    In a low resistance circuit _____?
    • A. 

      Voltage is very low.

    • B. 

      Current flow is very low.

    • C. 

      Voltage is very high.

    • D. 

      Current flow is very high.

  • 22. 
    In an electrical circuit voltage decreases, current flow___?
    • A. 

      Increases.

    • B. 

      Decreases.

    • C. 

      Constent.

    • D. 

      Variable.

  • 23. 
    Function of alternator fitted in engine is_____ ?
    • A. 

      To charge the battery only.

    • B. 

      To start the engine.

    • C. 

      To provide DC power to all electrical component.

    • D. 

      Both 1 and 3.

  • 24. 
    A limit switch is to_____ ?
    • A. 

       start the control circuit.

    • B. 

      Close the relay contact.

    • C. 

      Signal the end of an event.

    • D. 

      Indicate when the circuit is energized.

  • 25. 
    The function of diode is/are to ?
    • A. 

      Helps to convert AC to DC voltage.

    • B. 

      Allow electricity to flow in only one direction.

    • C. 

      To protect relays/solenoids against voltage spike.

    • D. 

      All of the above.

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