[PIPE] Question Bank for Advanced Coaching Series | Set 5 – Elements | Part 6

The minimum temperature to which moist air can be cooled under ideal conditions in a spray washer is _____.

The by-pass factor of a cooling decreases with _____.

In order to cool and dehumidify a stream of moist air, it must be passed over the coil at a temperature _____.

The index which correlates the combined effects of air temperature, relative humidity and air velocity on the human body is known as _____.

For rectangular ducts, the aspect ratio is equal to _____.

The air guide vanes are sometimes installed in axial flow fans in order to _____.

The axial flow fans are particularly suitable for handling _____.

The room air conditioner controls the _____.

The milky white ice is obtained if _____.

The dry ice is produced by _____.

The process of heating and immediately cooling the milk for controlling the bacteria growth is known as _____.

Ice of portable water can crack if frozen at temperature lower than _____.

The sound power level of a VAV Box (Variable Air Volume) depends mainly on Volume flow of supply air for a specific size box, configuration of the VAV box, flexible ducts, diffusers and what other factor?

Axial fans are best suitable for application.

Which of the following axial fan types is most efficient?

Constant rotative speed of the hydraulic turbine runner under varying load is achieved by a _____ that actuates a mechanism that adjust the gate openings.

A pipe or conduit used to carry water from reservoir intake to a reaction turbine is known as:

The efficiency of forward curved centrifugal fans compared to backward curved fans is _____.

When selecting a pump for a given application, it is usually desirable to use a pump that will operate near its BEP which stands for _____.

In order to prevent shock or water hammering in the penstock when the governor quickly closes the gates, many turbines are provided with a _____.

Name the fan which is more suitable for high pressure application?

A type of centrifugal pump impeller characterized by wide passages for water and the ratio of outside impeller to impeller eye diameter is about 1.5.

The seal that allows the impeller shaft of centrifugal pump to pass from outside of the pump to inside, while maintaining an air tight seal.

Stationary guide vanes of a centrifugal pump surround the impeller converts velocity energy to pressure head.

If two identical centrifugal pumps are installed in parallel the _____ is doubled.

_____ are used isolate as well as regulates the flow. They have a high pressure drop even wide open.

Which pipe accessories do not belong to the group?

_____ are known as vortex and periphery pumps.

Which types of pump does not belong to the group?

_____ impellers are generally preferred when handling average waters, because it does no rust and machining it, making its surface smooth are easy.

A valve used to prevent backflow in the fluid pipe is called:

_____ is a single-stage or multistage centrifugal pump with pumping element suspended from discharge piping also known as deep well or bore hole pumps.

_____ pumps are intended for handling thick pulps, sewage sludge, acid, or alkaline solutions, mixture of water and gritty solids that wear out metal pumps.

_____ is that part of a rotary pump mounted on the drive shaft; it is the principal pumping member.

What is the relationship of the capacity of centrifugal pump, Q to impeller diameter, D, when there are two impeller diameters (one is original the other cut down diameter) in the same pump?

What is the relationship of the horsepower of a centrifugal pump, P, to the impeller speed, N, is pump is at two different rotative speeds?

Hydraulic turbine suitable for low head.

If two identical centrifugal pump are installed in series, the system flow rate _____.

The formation ad collapse of vapor bubbles that occurs when pump inlet suction pressure falls to or below the vapor pressure of the liquid is called:

The process done in centrifugal pump by filling-up the suction line and pump casing with liquid to remove air or vapors from the waterways of the pump is called:

Which term does not belong to the group:

The efficiencies of all reversible heat engines operating between the same two reservoirs _____.

A process with no heat transfer is known as _____.

The relative density of a substance is the ratio of its density to the density of:

This type of heat exchanger allows fluids to flow at right angles to each other.

The fact the total energy in any one energy system remains constant is called the principle of _____.

A process for which the inlet and outlet enthalpies are the same.

The sum of energies of all the molecules in system, energies that appear in several complex forms.

A system that is completely impervious to its surrounding. Neither mass nor energy cross its boundaries.

A device used to measure small and moderate pressure difference.

A vapor having a temperature higher than the saturation temperature corresponding to its pressure.

The energy or stored capacity for performing work possessed by a moving body, by virtue of its momentum.

The thermodynamic process wherein temperature is constant and the change in internal energy is zero.

The function of a pump or compressor is to _____.

This law states that “all energy received as heat by a heat- engine cannot be converted into mechanical work”.

The intensity of pressure that is measured above absolute zero is called:

This is the ratio of the heat equivalent of the brake or useful horsepower developed by an engine and available on its crankshaft to the heat during the same time.

Flow work is equal to pressure times _____.

This form of energy is due to the position or elevation of the body.

Another term for constant volume process.

Work done by the steam during a reversible adiabatic expansion process in the turbine.

The efficiency of Carnot cycle depends upon the _____.

It is the heat required in a constant-pressure process to completely vaporize a unit-mass of liquid at a given temperature.

It is a commonly used device for measuring temperature differences or high temperatures.

The science and technology concerned with precisely measuring energy and enthalpy.

The rate of doing work per unit of time.

In an ideal Rankine cycle with fixed boiler and condenser pressure. What is the effect of superheating the steam to a higher temperature to the cycle thermal efficiency?

A vapor having a temperature higher than the saturation temperature corresponding to the existing pressure.

It is the work done in pushing a fluid across a boundary, usually into or out of a system.

A liquid that has a temperature lower than the saturation temperature corresponding to the existing pressure.

The combination of two refrigerants which cannot be separated by distillation process.

R-600 is what refrigerant?

It states that when two bodies are in thermal equilibrium with a third body. They are in thermal equilibrium with each other and hence are at the same temperature.

It states that the change of internal energy of an ideal gas is a function of only the temperature change

The energy or stored capacity for performing work possessed by a moving body, by virtue of its momentum.

The volume between the engine head and the piston when the piston is at the top dead center

The process in which both the intake and exhaust valves are closed, and the air-fuel mixture is processed by the upward piston movement.

Is a term expressing the combination of internal molecular energy, expansion work and flow work.