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Questions in this quiz (21)
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- Aa. Does not require a coil
- Bb. Produces AC power
- Cc. Produces a hotter spark at high speeds
- Dd. Does not require points
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- Aa. Does not require an injector
- Bb. May operate on a gas-air mixture only
- Cc. Do not have any valves
- Dd. None of the above
3Two types of steam nozzles used for steam turbines are convergent and;
Divergent
Stationary
Convergent-Divergent
Low Flow
High Velocity- ADivergent
- BStationary
- CConvergent-Divergent
- DLow Flow
- EHigh Velocity
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- ASmall pressure drop
- BLarge Pressure drop
- CSmall increase in pressure
- DLarge Increase in pressure
- EVelocity decrease
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- A45 degrees
- B30 degrees
- C180 degrees
- D15 degrees
- E90 degrees
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- AStationary blades
- BMoving blades
- CThere is no pressure drop
- DStationary and moving blades
- ENone of the above
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- AI, II
- BI, III, IV
- CI, II, III
- DIII, V
- EIV, V
8For large impulse turbines, it is very common to have a velocity compound first stage, followed by;
- ASeveral pressure compounded stages in the same casing
- BSeveral pressure-velocity compounded stages in the same casing
- CSeveral Acceleration compounded stages in a separate casing
- DSeveral Velocity compounded stages in a separate casing
- ENone of the above
9Turbines fall into two major categories, Condensing and;
- ALow pressure
- BHigh Pressure
- CDouble Flow
- DNon-condensing
- ESingle flow
10A non-condensing turbine is also called a;
- ALow-pressure turbine
- BBackpressure turbine
- CFront Pressure turbine
- DBleed turbine
- ENone of the above
11High pressure, high temperature casings used with temperatures above 550 degrees, are made of;
- ACast iron
- BCarbon steel
- CAluminum
- DCopper
- ECast alloy steel with 3% chromium and 1% molybdenum
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;
- ACreep
- BSlowness
- CTension
- DCrawl
- ENone of the above
13What percentage of pressure drop is there in a impulse turbine across the moving blades
- A5%
- B10%
- C30%
- D60%
- EThere is no pressure drop
14Seal Strips, used to allow close running clearance with relatively large clearance between heavy parts are often made of;
- ACarbon steel
- BAluminum
- CChrome-iron alloy
- DNickel
- ECopper
15In an impulse turbine, turbine thrust must be counteracted since failure to do so would result in;
- ALess pressure
- BGreater pressure
- CContact between the moving and stationary parts
- DContact between the moving parts and casing
- ENone of the above
16From the thrust bearing the shaft must be free to expand in either direction, thus, the shaft can have only (?) thrust bearing(s)
- A1
- B2
- C3
- D4
- E5
17Turbines can be used to drive;
- APumps
- BCompressors
- CFans
- DBlowers
- EAll of the above
18What is the over speed trip for a turbine used for?
- ATo shut down the turbine in case of low pressure
- BTo shut down the turbine in case of high pressure
- CTo shut down the turbine in case of high speed
- DJust another name for something that has no purpose
- ENone of the above
19Lubricating oil pressure on turbines is usually in the (?) Range?
- A15psi – 40psi
- B15KPa – 40KPa
- C69KPa – 138KPa
- D69psi – 138psi
- ENone of the above
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.
- A43 degrees C – 49 degrees C
- B43 degrees F – 49 degrees F
- C23 degrees C – 42 degrees C
- D23 degrees F – 42 degrees F
- ENone of the above
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;
- ABending
- BTapering
- CSagging
- DBowing
- EHogging
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- power engineering 3b2 Quiz on quiz 1, created by TRAVIS CANNING on 26/02/2016.
- Author
- TRAVIS CANNING
- Language
- English
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