4660496
Descripción
Test por TRAVIS CANNING, actualizado hace más de 1 año
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Creado por TRAVIS CANNING
hace más de 8 años
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|
Pregunta 1
Pregunta
A 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
Respuesta
-
a. Does not require a coil
-
b. Produces AC power
-
c. Produces a hotter spark at high speeds
-
d. Does not require points
Pregunta 2
Pregunta
The 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
Respuesta
-
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
Pregunta 3
Pregunta
Two types of steam nozzles used for steam turbines are convergent and;
Divergent
Stationary
Convergent-Divergent
Low Flow
High Velocity
Respuesta
-
Divergent
-
Stationary
-
Convergent-Divergent
-
Low Flow
-
High Velocity
Pregunta 4
Pregunta
As 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
Respuesta
-
Small pressure drop
-
Large Pressure drop
-
Small increase in pressure
-
Large Increase in pressure
-
Velocity decrease
Pregunta 5
Pregunta
A 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
Respuesta
-
45 degrees
-
30 degrees
-
180 degrees
-
15 degrees
-
90 degrees
Pregunta 6
Pregunta
The 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
Respuesta
-
Stationary blades
-
Moving blades
-
There is no pressure drop
-
Stationary and moving blades
-
None of the above
Pregunta 7
Pregunta
In 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
Respuesta
-
I, II
-
I, III, IV
-
I, II, III
-
III, V
-
IV, V
Pregunta 8
Pregunta
For large impulse turbines, it is very common to have a velocity compound first stage, followed by;
Respuesta
-
Several pressure compounded stages in the same casing
-
Several pressure-velocity compounded stages in the same casing
-
Several Acceleration compounded stages in a separate casing
-
Several Velocity compounded stages in a separate casing
-
None of the above
Pregunta 9
Pregunta
Turbines fall into two major categories, Condensing and;
Respuesta
-
Low pressure
-
High Pressure
-
Double Flow
-
Non-condensing
-
Single flow
Pregunta 10
Pregunta
A non-condensing turbine is also called a;
Respuesta
-
Low-pressure turbine
-
Backpressure turbine
-
Front Pressure turbine
-
Bleed turbine
-
None of the above
Pregunta 11
Pregunta
High pressure, high temperature casings used with temperatures above 550 degrees, are made of;
Respuesta
-
Cast iron
-
Carbon steel
-
Aluminum
-
Copper
-
Cast alloy steel with 3% chromium and 1% molybdenum
Pregunta 12
Pregunta
The 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;
Respuesta
-
Creep
-
Slowness
-
Tension
-
Crawl
-
None of the above
Pregunta 13
Pregunta
What percentage of pressure drop is there in a impulse turbine across the moving blades
Respuesta
-
5%
-
10%
-
30%
-
60%
-
There is no pressure drop
Pregunta 14
Pregunta
Seal Strips, used to allow close running clearance with relatively large clearance between heavy parts are often made of;
Respuesta
-
Carbon steel
-
Aluminum
-
Chrome-iron alloy
-
Nickel
-
Copper
Pregunta 15
Pregunta
In an impulse turbine, turbine thrust must be counteracted since failure to do so would result in;
Respuesta
-
Less pressure
-
Greater pressure
-
Contact between the moving and stationary parts
-
Contact between the moving parts and casing
-
None of the above
Pregunta 16
Pregunta
From the thrust bearing the shaft must be free to expand in either direction, thus, the shaft can have only (?) thrust bearing(s)
Respuesta
-
1
-
2
-
3
-
4
-
5
Pregunta 17
Pregunta
Turbines can be used to drive;
Respuesta
-
Pumps
-
Compressors
-
Fans
-
Blowers
-
All of the above
Pregunta 18
Pregunta
What is the over speed trip for a turbine used for?
Respuesta
-
To shut down the turbine in case of low pressure
-
To shut down the turbine in case of high pressure
-
To shut down the turbine in case of high speed
-
Just another name for something that has no purpose
-
None of the above
Pregunta 19
Pregunta
Lubricating oil pressure on turbines is usually in the (?) Range?
Respuesta
-
15psi – 40psi
-
15KPa – 40KPa
-
69KPa – 138KPa
-
69psi – 138psi
-
None of the above
Pregunta 20
Pregunta
Before 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.
Respuesta
-
43 degrees C – 49 degrees C
-
43 degrees F – 49 degrees F
-
23 degrees C – 42 degrees C
-
23 degrees F – 42 degrees F
-
None of the above
Pregunta 21
Pregunta
When 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;
Respuesta
-
Bending
-
Tapering
-
Sagging
-
Bowing
-
Hogging
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