quiz 1

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

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

Two types of steam nozzles used for steam turbines are convergent and; Divergent Stationary Convergent-Divergent Low Flow High Velocity

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

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

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

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

For large impulse turbines, it is very common to have a velocity compound first stage, followed by;

Turbines fall into two major categories, Condensing and;

A non-condensing turbine is also called a;

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

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;

What percentage of pressure drop is there in a impulse turbine across the moving blades

Seal Strips, used to allow close running clearance with relatively large clearance between heavy parts are often made of;

In an impulse turbine, turbine thrust must be counteracted since failure to do so would result in;

From the thrust bearing the shaft must be free to expand in either direction, thus, the shaft can have only (?) thrust bearing(s)

Turbines can be used to drive;

What is the over speed trip for a turbine used for?

Lubricating oil pressure on turbines is usually in the (?) Range?

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.

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;