Elements (Part 4 of 500)

Morse test is use to measure the ______ of multi-cylinder engine.

Indicated power

Ignition delay can be minimized by adding _____ to decrease engine locking.

Ethyl nitrate

For the submerged plane surface, the point on the surface where the resultant force acts is called the

Center of pressure

At any point in fluid at rest, the pressure is the same in all directions. This principle is known as

Pascal’s Law

The hot wire manometer is used to measure

Gas velocities

The pitot static tube measures

Static pressure

The terminal velocity of a small sphere setting in a viscous fluid varies as the

Inverse of fluid viscosity

Pressure drag result from

Skin friction

The pressure coefficient is the ratio of pressure forces to

Inertia forces

Which of the following head loss coefficient among the following type of entrance?

Reentrant

What waste water treatment method involves of algae from stabilization pond effluents?

Microscreening

The number of nozzles will depend on the quantity of steam required by the turbine. If nozzles occupy the entire arc of the ring, the turbine is said to have

Full peripheral admission

Tandem compound units may also have two low pressure castings that produces

Triple flow

A type of turbine used for driving pumps, fans, and other auxiliaries in power pant commonly operate at exhaust pressures approximating atmospheric.

Back pressure turbine

A governor with 0% regulation is termed as

Isochronous governor

The speed regulation for most turbine-generators is adjustable from

2 to 6%

Poppets valves of steam turbine are used for extraction pressure of:

20 to 150 psig

When both bearings of steam engine are on one side of the connecting rod, the engine is referred to as:

Side crank engine

When the valve in steam engine is in mid position of its travel, it will cover the steam port by an amount known as

Steam lap

A type of governor in steam engine that do not control the actual admission of steam to the cylinder, but controls the pressure of the steam.

Throttling governor

By inter-cooling using two stage compressor of Brayton cycle, the backwork ratio will

Decrease

On dynamic similitude, the relation which represents the ratio of inertia force to pressure forces is

Euler number

What is the maximum velocity in a sewer flowing full?

0.6 m/s

A temporary structures constructed to exclude water from the site of the foundation during its excavation and construction is called:

Coffer dam

Which is not a physical characteristic of water?

Hardness

Which dam is best for weak foundation?

Buttress

What is the volume of water which will drain freely from the aquifer?

Specific yield

What is the line defined by the water level in a group of artesian wells?

Peizometric surface

Select the one that is a positive indication of pollution of a river.

Chloride content

Which instruments is used to measure humidity of the atmosphere continously?

Hydrograph

Entrance losses between tank and pipe or losses through elbows, fittings and valves are generally expresses as a function of:

Kinetic energy

The air that contains no water vapor is called

Dry air

In psychrometric chart, the constant-enthalpy lines coincide with constant temperature lines at temperature

below 50oC

The amount of moisture in air depends on its

Temperature

The deep body temperature of healthy person is maintained constant at

37oC

Air motion also plays important role in

Human comfort

During simple heating and cooling process has a ____ humidity ratio.

Constant

The ______ follows a line of constant wet-bulb temperature on the psychometric chart.

Evaporative cooling process

A vapor which is not about to condense is called

Superheated vapor

Passing from the solid phase directly into vapor phase is called

Sublimation

Robert Boyle observed during his experiments with a vacuum chamber that the pressure of gases is inversely proportional to their

Volume

______ is energy in transition

Heat

Is the mode of energy transfer between a solid surface and the adjacent liquid or gas which is in motion, and it involves combine effects of conduction and fluid motion.

Convection

Radiation is usually considered as

Surface phenomenon

Work is ______ between the system and the surroundings.

Energy interaction

Is a process during which the system remains in equilibrium at all times.

Quasi-equilibrium

In the absence of any work interaction between a system and its surroundings, the amount of net heat transfer is equal.

To the change in the total energy of a closed system

The constant volume and constant pressure specific heats are identical for

Incompressible substance

The velocity of fluid is zero at the wall and maximum at the center because of the

Viscous effect

For steady flow devices, the volume of the control volume is

Constant

The work done in a turbine is _____ since it is done by the fluid.

Positive