quiz 1

1. 1A magneto ignition system:
   
   a. Does not require a coil
   b. Produces AC power
   c. Produces a hotter spark at high speeds
   d. Does not require points
   

   1. Aa. Does not require a coil
   2. Bb. Produces AC power
   3. Cc. Produces a hotter spark at high speeds
   4. Dd. Does not require points
2. 2The dual fuel engine:
   
   a. Does not require an injector
   b. May operate on a gas-air mixture only
   c. Do not have any valves
   d. None of the above
   

   1. Aa. Does not require an injector
   2. Bb. May operate on a gas-air mixture only
   3. Cc. Do not have any valves
   4. Dd. None of the above
3. 3Two types of steam nozzles used for steam turbines are convergent and;
   
   Divergent
   Stationary
   Convergent-Divergent
   Low Flow
   High Velocity
   

   1. ADivergent
   2. BStationary
   3. CConvergent-Divergent
   4. DLow Flow
   5. EHigh Velocity
4. 4As the steam passes through the convergent nozzle there is a;
   
   Small pressure drop
   Large Pressure drop
   Small increase in pressure
   Large Increase in pressure
   Velocity decrease
   

   1. ASmall pressure drop
   2. BLarge Pressure drop
   3. CSmall increase in pressure
   4. DLarge Increase in pressure
   5. EVelocity decrease
5. 5A Reaction blade is characterized by a large entranced angle of almost (?) and a small
   discharge angle.
   
   45 degrees
   30 degrees
   180 degrees
   15 degrees
   90 degrees
   

   1. A45 degrees
   2. B30 degrees
   3. C180 degrees
   4. D15 degrees
   5. E90 degrees
6. 6The distinguishing feature if the reaction turbine is the fact that the pressure does drop across the;
   
   Stationary blades
   Moving blades
   There is no pressure drop
   Stationary and moving blades
   None of the above
   

   1. AStationary blades
   2. BMoving blades
   3. CThere is no pressure drop
   4. DStationary and moving blades
   5. ENone of the above
7. 7In order to reduce the steam and blade velocity, the following methods may be used;
   
   Pressure compounding
   Velocity compounding
   Pressure-Velocity compounding
   Mass compounding
   Acceleration compounding
   

   1. AI, II
   2. BI, III, IV
   3. CI, II, III
   4. DIII, V
   5. EIV, V
8. 8For large impulse turbines, it is very common to have a velocity compound first stage, followed by;
   
   
   

   1. ASeveral pressure compounded stages in the same casing
   2. BSeveral pressure-velocity compounded stages in the same casing
   3. CSeveral Acceleration compounded stages in a separate casing
   4. DSeveral Velocity compounded stages in a separate casing
   5. ENone of the above
9. 9Turbines fall into two major categories, Condensing and;

   1. ALow pressure
   2. BHigh Pressure
   3. CDouble Flow
   4. DNon-condensing
   5. ESingle flow
10. 10A non-condensing turbine is also called a;

    1. ALow-pressure turbine
    2. BBackpressure turbine
    3. CFront Pressure turbine
    4. DBleed turbine
    5. ENone of the above

11. 11High pressure, high temperature casings used with temperatures above 550 degrees, are made of;

    1. ACast iron
    2. BCarbon steel
    3. CAluminum
    4. DCopper
    5. ECast alloy steel with 3% chromium and 1% molybdenum
12. 12The term for a material at a given maximum temperature and under constant pressure that continues to deform with a very slow increasing strain on the material is called;

    1. ACreep
    2. BSlowness
    3. CTension
    4. DCrawl
    5. ENone of the above
13. 13What percentage of pressure drop is there in a impulse turbine across the moving blades

    1. A5%
    2. B10%
    3. C30%
    4. D60%
    5. EThere is no pressure drop
14. 14Seal Strips, used to allow close running clearance with relatively large clearance between heavy parts are often made of;

    1. ACarbon steel
    2. BAluminum
    3. CChrome-iron alloy
    4. DNickel
    5. ECopper
15. 15In an impulse turbine, turbine thrust must be counteracted since failure to do so would result in;

    1. ALess pressure
    2. BGreater pressure
    3. CContact between the moving and stationary parts
    4. DContact between the moving parts and casing
    5. ENone of the above
16. 16From the thrust bearing the shaft must be free to expand in either direction, thus, the shaft can have only (?) thrust bearing(s)

    1. A1
    2. B2
    3. C3
    4. D4
    5. E5
17. 17Turbines can be used to drive;

    1. APumps
    2. BCompressors
    3. CFans
    4. DBlowers
    5. EAll of the above
18. 18What is the over speed trip for a turbine used for?

    1. ATo shut down the turbine in case of low pressure
    2. BTo shut down the turbine in case of high pressure
    3. CTo shut down the turbine in case of high speed
    4. DJust another name for something that has no purpose
    5. ENone of the above
19. 19Lubricating oil pressure on turbines is usually in the (?) Range?

    1. A15psi – 40psi
    2. B15KPa – 40KPa
    3. C69KPa – 138KPa
    4. D69psi – 138psi
    5. ENone of the above
20. 20Before lubrication oil flows through the bearings of a turbine it needs to be cooled in the oil coolers. The typical outlet temperature, from the coolers, is in the (?) range.

    1. A43 degrees C – 49 degrees C
    2. B43 degrees F – 49 degrees F
    3. C23 degrees C – 42 degrees C
    4. D23 degrees F – 42 degrees F
    5. ENone of the above
21. 21When left cold and at a standstill the weight of the rotor of a turbine will tend to cause the rotor to sag slightly. This is called;

    1. ABending
    2. BTapering
    3. CSagging
    4. DBowing
    5. EHogging

Descrição

power engineering 3b2 Quiz sobre quiz 1, criado por TRAVIS CANNING em 26-02-2016.

Autor

TRAVIS CANNING

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English

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3b2power engineering

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