ESAS 2 EVAL

3回閲覧 • 69問 • 2年前

問題一覧

A secondary book of accounts, the information of which is obtained from the joumal

ledger

Any method of rapaying a debt, the principal and interest Included, usually by a series of equal payments at equal intervals of time.

Amortization

What refers to the state at which liquid and gaseous phases are indistinguishable?

Critical point

A simultaneous generation of electricity and steam (or heat) in a single power plant is called:

cogeneration

A gas at 1 atm pressure originally occuples a volume of 20 ft³. The gas is polytropicaily compressed with a=1.15 unill the pressure is 48.51 psia. What work is required for this comprassion

-47,560 lbf-ft

Air is compressed in a diesel engine from an initial pressure 13 pala (89.64 kPa abs) and temperature of 120^{\circ}F (48.8^{\circ}C) to one-twelfth its initial volurne, Assuming the compression to be adiabatic, Will the final pressure be

421 psi (2903 kPa)

A Carnot machine operates between hot reservoir at 200°C and a cold reservoir at 200°C, when operated as an engine it receives 1000 kJ/kg. Find the coefficient of performance (COP) when operated as a refrigerator.

2.63

Helium (R=0.4968 U//f_{1}^{2}R) is compressed isothermally from 14,7 psia and 66°F the compression ratio is 4. What is the work done by the gas in BTU/Ibm?

363

A Camot engine receives 130 BTU of heat from a hot reservoir at 700°F and rejects 49 BTU of heat, Calculate the temperature of the cold reservoir.

-22.77°F

A steam engine operating between a boiler temperature of 220°C and a condenser temperature of 35 °C delivers 8 hp its efficiency is 30% of that for a Camot engine operating between these temperature limits, how many calones ars exhausted to the condenser each seconds?

11,240

An ideal gas at 45 paig and 80°F is heated in a closed container to 130°F, What is the final pressure?

49.17 psig

Heat is supplied to 20 ibm of ice (Cp=0.5TU/lbm-°F) at 0°F at the rate 160 BTU/sec. How long will it take to convert the ice to steam (C, 0,5BTU/Ibm-°F) at 213°F?

163.78 sec

A 20 g piece of aluminum with specific heat constarit of 0.21 Cal/g-C at 90°C is dropped into a cavity in a large block of ice at 0°C. How much ice does the aluminum melt? take L. 80 Cal/g

4.7 g

The gas constant (R) is equal to the _______ of two specific heat

ratio

The sum of U+ pV represents?

Enthaply

Which of the following values characterize the state of the system?

enthaply

A bond with a par value of P1,000 and with a bond rate of 10% payable annually is sold now for P1,080. If the yield is be 12%, how much should the redemption price be at the end of 8 years?

P1,444.07

The annual maintenance cost of a machine shop Is P69,994, If the cost of making a forging is P56 per unit and its sellin price is P135 per forge unit, find the number of units to be forged to break-even

866

A company purchases an asset for P10,000 and plans 20 year, what is the depreciation in the third year?. Use to keep it for 20 years. If the salvage value is zero at the end of the sum-of-the-years digits depreciation?

P500

VCP trading Co. set aside P200,000 each year for expansion. If the fund earns 8% compounded arruasily How long before a new building costing P2,500,000 can be built?

A company is planning to replace certain equipment, they are thinking whether to replace it now or a year after, if such equipment cost P1Million now, how much would it cost 1 year from now when interest rate is 8% annually?

P1.08M

A small machine has an Initial cost of P20,000, a salvage value of P2,000 and a life of 10 years. If your cost of operation per year Is P3,500 and your revenues per year la P9,000, what is the approximate rate of return (ROR) on the investment?

24.80%

A process during which there is no heat transfer is called__________ process

isentropic

What is the most frequent term is used in thermodynamic heat engines which indicate how well an energy conversion or transfer process is accomplished?

efficiency

In a complete heat engine cycle, which of the following is the area enclosed by the PV-diagram?

The work done by the engine per cycle

Which cycle is generally used for gas turbine?

Brayton cycle

Which one of the following is Charle's Law

(V/T)=k

In an ideal gas, if the pressure is triple and also the temperature is also tripied: What is the new volume?

(1/3) Vo

A gas has a density of 0.094 Ib. m^{2} at 100°F and 2 atm. What pressure is needed to change the density to 0.270 lb. it at 250°F?

6.26 atm

Annual payments which are made at the end of each period

ordinary annuity

Which of these gives the lowest effective rate of Interest

11.60% compounded monthly

What is the other term for "acid-test ratio"?

Quick ratio

What is the type of annuity where the payments are made at the beginning of sath period starting from the first period)

Annuity Due

What is defined as the interest on a loan or principal that based only on this original amount of the loan or principal?

Simple interest

When the expansion or compression of gas takes place without transfer of heat to or from the ges, the process is called

Adiabatic process

Which law that states "Entropy of all perfect crystaline solids is zero at absolute zero temperature

Third law of thermodynamics

The term thermodynamics" comes from Greek wards "Therme" and "dynamis" which means

heat power

The term thermodynamics" was first used in 1840 in the publication of

Lord Kelvin

The first law of thermodynamics is based on which of the following principles?

Conservation of energy

Extensive properties per unit mass are called

Specific properties

A system is in _______equilibrium if there is no change in pressure at any point of the system with time.

mechanical

What refers to any change that a system undergoes from one equilibrium state to another equilibrium state?

Process

What refers to the series of states through which a system passes during a process?

Path

What form of energy refers to those a system possesses as a whole with respect to some outside reference frame, such as potential and kinetic energies?

Macroscopic form of energy

Who colned the word "energy" In 18077

Thomas Young

What refers to the measure of the disorder present in a given substance or system?

Entropy

Entropy is measured In?

joule/kelvin

A liquid that is about to vaporize is called _______liquid

saturated

A vapor that is about to condense is called ________ vapor

saturated

A vapor that is not about to condense is called_________ vapor

superheated

A substance that has a fixed chemical composition is known as ________substance

pure

A system is said to be in thermodynamic equilibrium if it maintains ___________ equilibrium

thermal, mechanical and chemical

An open system may refer to

control volume

A closed system may refer to

control mass

What is a process in which the system remains infinitesimally closed to an equilibrium state at all times?

Quasi-state or quasi-equilibrium process

How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?

The prefix Iso used to designate a process means_______

remains constant

What is a process during which the specific volume remains constant?

isochoric process or isometric process

One erg is equivalent to how many joules?

10^-8

One calorie is equivalent to how many joules?

4.184

The enthalpy change for any chemical reaction is Independent of the inte in sdinte stages, provided the initial and final conditions are the same for each route." This statement is known as

Hess's law

What is the heat capacity of one pram of a substance?

Specific heat

What is the heat capacity of one mole of a substance?

molar heat

A bank pays 1,0% Interwet on savings account four times a year, Find the effective annual Inderest rate.

4.06%

Mandarin bank advertises 0,5% account that yields 9,84% annually. Find how often the interest is compounded,

Quarterly

Amount of money paid for the use of borrowed capital

Interest

The difference between the present and future wonn of money at some time in the future

Discount

Which of these gives the lowest effective rate of Interest?

11.60% compounded monthly

What is the annual rate of interest if P265 is earned in four months on an Investment of P15, 000?

5.3%

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