Mock Exam - Part 1 & 2 Flashcards by Angelyn Villegas

The critical point of a mixture occurs for which of the following cases?

a. the vapor and liquid exist in a single form
b. the liquid has no absorbed gas
c. the vapor phase is stable
d. the liquid is completely vaporized

a. the vapor and liquid exist in a single form

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Determine the equivalent resistance of the circuit below

50 ohms

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Calculate the mole fraction of ethylene glycol (C2H6O2) when 120g of it are dissolved in 1.2kg acetone (C3H6O)

b. 0.0857

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If the particle has a velocity of 4 meters per second and a kinetic energy of 144 joules, then the mass, in kilograms of this particle must be:

d. 18

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Air temperature is 250R, what is the equivalent of this reading in K?

a. 138.6

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It is the distance a point on the circumference of the milling cutter travels in one minute measured in surface feet per minute

a. Cutting Speed

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A steel rod is used as a weigh bar has a modulus of elasticity of 29x10^6 lbs per in^2. It provided with a very accurate method of determining change of length when load is applied. The rod is 1/2 in diameter and 24 inches long. A total extension of 0.004 inch is observed when a certain load is applied. Determine the value of the applied load.

b. 949 lbs.

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Determine the total impedance of the circuit

c. (7+j0) ohms

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Two boys B1 and B2 act as a point, The magnitude of B1 is 8lbs, and its direction is 60 degrees above the horizontal axis in the first quadrant. The magnitude of B2 is 5lbs and its direction is 53 degrees below the horizontal axis in the fourth quadrant. What is the magnitude of the resultant?

a. 7.6lbs

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Find the angle of elevation of a gun which fires a shell with a muzzle velocity of 366 m/s at a target on the same level but 4575m

c. 9.79 degrees

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A vertical column of water will be supported to what height by standard atmospheric pressure

10.3 m = 33.79 ft

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A projectile is launched at 600fps(ft/s) with a 30 degrees inclination from the horizontal. The launch point is on a plateau 500ft above the plane of impact. Neglecting the air friction, find the maximum altitude above the plane of impact.

d. 1898 ft

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Given Vab = 10V, determine the voltage of the source

b. 27V

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The total mixture pressure P is the sum of the pressures that each gas would exert if it were to occupy the vessel alone at volume V and temperature T. This is known as ______

d. Dalton’s Law

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A condenser vacuum gauge reads 715 mmHg when the barometer stands at 757 mm Hg. State the absolute pressure in the condenser in kPa.

a. 5.6 kPa

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A chemist wants to make a 500ml of 0.05M HCl by diluting a 6M HCl solution. How many of that solution should be used?

d. 4.20 ml

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If the specific weight of a liquid is 58.5 lbf per cubic foot, what is the specific volume if the liquid?

d. 1.067 cm^3/g

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What is the volume of material removed from the work-piece in one minute?

b. Machine Horse Power

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A body mass of 50g is at origin x=0 on a horizontal frictionless surface, At time t=0 a force of 10 dynes is applied to the body parallel to the x-axis, and 5 sec. Later the force is removed. What is the velocity of the body at t=5s?

a. 1.0 cm/s

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What gas thermometer is based in the principle that at low pressure, the temperature of a gas is proportional to its pressure at constant volume?

d. Constant-volume gas thermometer

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What time between 2 and 3 o’clock will the angle between the hands of the clock be bisected by the line connecting the center of the clock and the 3 o’clock mark?

a. 2:18:27.6

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It concerns with avoiding diseases and disorders caused by exposure to hazardous materials or conditions

c. Occupational Health

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Two major types of chemical bonds are observed in chemical bonding; ionic and covalent. Which are the following has a bond that is the least ionic in character?

c. H(sub)2

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A player kicks a football at an angle of 37 degrees with the horizontal and with an initial velocity of 48 ft/s. A second player standing at a distance of 100ft from the first in the direction of the kicks start running to meet the ball at the instant it is kicked. How fast must run in order to catch the ball before it hits the ground?

d. 17.22 ft/s

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It is a mechanical mixture of very pure iron and a silicate slag

Wrought Iron

A mixture of 14 psia and a 68oF that is 30% by the weight CO2 (MW=44 g/mol) and 70% by weight N2 (MW = 28 g/ml) has a partial pressure of CO2 in psia that is nearest to

b. 3.15

Calculate the molar concentration of a solution that contains 15g of potassium hydroxide in 225ml solution

c. 1.20M

A garden hose attached with a nozzle is used to fill a 10-gal bucket. The inner diameter of the hos is 2cm, and it reduces to 0.8 cm at the nozzle exit. If it takes 50 s to fill the bucket with water, determine the average velocity of water at the nozzle exit.

15.06 m/s

Determine the elevation of a road curve 183 m in radius so that there will be no side thrust for a speed of 72kph

b. 12.56 degrees

Determine the force in Newton in a piston of 465 mm^2 area with a pressure of 0.172 MPa

c. 80N

These allowances are added to fixed allowances when working conditions differ markedly for instance because of poor environmental conditions that cannot be improved, added stress and strain in performing the job in question, and so on.

d. Variable Allowances

The two steps in preparing chocolate candy bars are molding and packaging. Personal fatigue and delay allowances are set at 15%. The molding machine operator is rated 110% and the packer is rated 80%. Observed times per batch are given below. Determine the normal time of both tasks

b. Molding = 31.90, Packing = 32

It is a generic term for those techniques used in examination of human work in all its contexts, and which lead systematically to the investigation of all the factors which affect the efficiency and economy of the situation being reviewed, in order to effect improvement.

a. Work Study

Consider the following task broken down into 5MTM elements: What is the total time in seconds for the task?

b. 1.63

What is the acceptable heart rate recovery after cessation of work is?

Given four machines producing 100dB, 91dB, 90dB, and 89dB respectively, what is the total sound pressure level?

b. 101.2 dB

A coffee cup packaging operation has four work elements. A preliminary stud provided the following results: Work element 1 was observed only five times because it occurs once every two work cycles. The study covered the packaging of 10 cartons. Determine the maximum sample size if the estimate for the selected time is to be within 4 percent of the true mean 95% of the time.

What is the graphic representation if the therblig Grasp?

b. reverse U

A phenomenon in which increased employee productivity may be attributed due to perceived employer interest in improving methods or the workplace

a. Hawthorne

What is the largest number that can be represented using 8 bits?

a. 11111111

What is the recommended handle length of a hand tool?

d. 125 mm

It may be given to trainee operatives engaged on work for which standard times have been issued, as a temporary benefit while they develop their ability

b. Learning Allowance

Timbuktu General Hospital wants to set the standard time for lab technicians to pour a tube specimen using MTM. The sample tube is in a rack and the centrifuge tubes in a nearby box. A technician removes the sample tube form the rack, uncaps it, gets the centrifuge tube, pours, and places both tubes in the rack. Compute for the total standard time for this task in seconds

d. 8.6

Suppose you want to set a time standard for the baker making her specialty, square donuts. A work sampling study of her on "donut day" yielded the following results: What is the standard time per donut given the allowance is added to its normal time?

a. 0.08

The associate dean of college of business at technical school has succumbed to faculty pressure to purchase a new fax machine, although she has always contented that the machine would have minimal use. She has estimated that the machine will be used only 20 percent of the time. Now that the machine has been installed, she asked the students in the work measurement course to conduct a work sampling study to see what the proportion of the time the new fax machine is used. She wants the estimate to be within 3 percent of the actual proportion, with a confidence level of 95 percent. Determine the sample size for the work sample.

d. 683

Alvin Villegas, of Villegas Consulting Group, takes 3 hours and 25 mins to write an end of month report. Alvin is rated 95% of his work pace and the office has a personal time allowance of 8%. There is no delay time or fatigue time. What is the normal time for writing an end of month report.

b. 3.25

How far should your monitor be from your eyes?

b. 18" - 30"

What is the recommended number of observation cycles of a 0.50 minute cycle time?

b. 60

DRJ Manufacturing has just observed a job in its laboratory in anticipation of releasing the job to the factory for production. The firm wants rather good accuracy for costing and labor forecasting. Specifically, it wants to provide 95.5% confidence level and a cycle time that is within 4% of the true value. The data collected so far are as follows: How many observations should it make?

a. 8

Raphael is very organized and wants to plan his day perfectly. To do this, he has his friend Francis time his daily activities. Here are the results of his timing Raphael on polishing two pairs of black shoes using the snapback method of timing. Assume 5% allowance factor for Raphael to put something mellow on his iPod. What is the standard time for polishing a pair given the allowance is added to its normal time?

a. 2.25

A male worker performs a repetitive task that requires an energy expenditure rate of 7.5 kcal/min for 4 hours. Each hour, he works 40 mins and takes a 20-minute rest break. During the rest breaks, his energy expenditure rate is estimated to be 1.5 kcal/min. Determine the time-weighted energy expenditure.

d. 5.5 kcal/min

Work-related musculoskeletal injuries due to highly repetitive motions involving excessive joint motions with high force, also termed repetitive-motion injuries

d. Cumulative Trauma Disorder

Equivalent of decimal value of 178 in straight binary code is _______ and in BCD is ______

c. 10110010, 101111001101

The home security devices produced by a firm are assembled manually in 4 successive steps. Unit time requirements for these 4 operation are to be expected to be as follows: To satisfy the forecasted demand for the devices it will be necessary to setup an assembly line which is capable of yielding an output of 9000 units in the 40 hrs during which the plant operates each week. What number of workers must be assigned to each operation 2 and 4 if the result is to be fairly balanced line with the required output capacity?

c. 6 and 9

On a average daily basis, the gross energy intake of a healthy woman is 9279kJ, the energy content of her feces and urine are 647kJ and 318kJ, respectively. Her average daily digestible energy intake and metabolizable energy intake would be, respectively,

d. 9279kJ - 647kJ and 9279kJ - (647kJ + 318kJ)

A female worker performs a repetitive task that requires an energy expenditure rate of 5.5 kcal/min for 5 hrs. Each hour, she works 50 mins and takes a 10-min rest break. During the rest breaks, her energy expenditure rate is estimated to be 0.95 kcal/min. Determine the difference between the time weighted average expenditure and recommended value.

One who is accepted as having the necessary physical attributes, who possesses the required intelligence and education, and who has acquired the necessary skill and knowledge to carry out the work in hand to satisfactory of safety, quantity, and quality

d. Qualified Worker

The hands should be relieved of all work of __________ the work-piece where this can be done by a jig, fixture or foot-operated device.

d. Holding

ACX Manufacturing has just observed a job in its laboratory in anticipation of releasing the job in the factory for production. The firm wants rather good accuracy for costing and labor forecasting. Specifically, it wants to provide a 99% confidence level and a cycle time that is within 3% of the true value. The data collected so far are as follows: How many observation should be taken?

c. 72 observations

An industrial engineer has been asked to prepare an estimate of the proportion of time that a grinding machine operator spends adjusting the machine, with a 99 percent confidence level. Based on previous experience, the engineer believes the working proportion will be approximately 25%. If the engineer uses a sample size of 250 observations, what is the maximum possible error that will be associated with the estimate?

a. 7.10%

According to the US Occupational Safety and Health Administration (OSHA), permissible noise limits, when exposure varies are calculated as follows: Noise Dose (D) = 100 x summation (C/T) Thus given the following measures for Situation 1 and Situation 2 (See tables below), is there a problem with either or both situations?

c. Situation #1 exceeds the OSHA permissible limits of 100 dBA

A work measurement technique whereby times established for basic human motions which are classified according to the nature of the motion and the condition under which it is made used to build up the time for a job at a defined level of performance

b. Predetermined Time Standard

The manager of the order distribution center for the Issa Bags Mfg. has a company directive to downsize his operation. He has decided to conduct work sampling studies of employees in the order processing department, the warehouse area, and the packaging area. In the warehouse area he has 17 employees who locates items, pull them, and put them on conveyors to the packaging area. A work sampling study was conducted over a 5-day period to determine the proportion of time warehouse employees were ide, and out of the 50 observations, 400 employees were idle? How many observations should be taken if the manager wants to be 90 percent confident the estimate is within 5% of the actual proportion of time a warehouse employee is idle?

b. 271

In the reference to previous question, the manager also conducted a work sampling study of the packaging area and discovered that the 28 employees were idle approximately 37% of the time. What is the required number of packaging area employees so that the manager may redesign his operation to downsize and be more efficient?

d. 18

It concerns with avoiding diseases and disorders caused by exposure to hazardous materials or conditions

c. Occupational Health

A female worker performs physical labor that has an energy expenditure rate of 4.8 kcal/in for 35 mins. During the rest breaks, her energy expenditure rate is estimated to be 0.95kcal/min. Determine the appropriate lenght of a rest break.

Concerned with capabilities of the human brain and sensory system while performing information processing activities

b. Cognitive Ergonomics

The head arranged for a graduate assistant to make observations for the work sample, but the graduate student's schedule enabled her to make only 300 random observations in the time allotted for the study. The results of the work sampling study showed that the secretaries assisted 12% of the time, somewhat less than the head anticipated. Given the number of observations that were included in the work sampling study, what is the value of Z to determine how confident can the department head be that the sample results is within 3% of the actual proportion?

d. 1.60

It is a motion of empty hand to or from object, time depends on distance moved, and usually preceded by Release and followed by Grasp

d. Reach

Green Grass's plant manager just received marketing's latest forecasts of Big Broadcaster sales for the next year. She wants its production line to be designed to make 2,400 spreaders per week for at least the next 3 months. The plant will operate 40 hrs per week. Suppose that she finds a solution that requires only five stations. Total task times are 244 seconds. What would be the line's efficiency?

b. 81.3%

Muscular work for which the oxygen intake is inadequate

b. Anaerobic

based on OSHA law, how many continuous hours per day of a 115 dBA sound level would be permissible?

d. 0.25 hrs of a 115 dBA sound level

A time study was performed on a particular machine, the results of which are as follows: Mean manual effort time per cycle: 6.53 mins Mean cutting time (power feed): 4.36 mins Mean performance rating: 115% Machine allowance (power feed): 10% fatigue allowance: 15% Compute the standard time for the operation given the allowances are added to their normal times.

b. 13.43

A worker is 40 years old and weighs 160lb. His daily activity metabolism rate is at 1700 kcal. What is daily digestive metabolism rate of the worker

a. 338 kcal

The following are general characteristic of hand motions except - a. finger motions b. motions involving fingers and wrist c. motion involving fingers, wrist and forearm d. motions involving fingers, wrist and lower arm

d. motions involving fingers, wrist and lower arm

Which of the following should be used when the sequence of conditions and action is critical

b. decision tree

It is the recommended maximum light intensity ratio between the work and the immediate environment

d. 5 to 1

The instructions and data in a computer system is referred to as

a. Software

Which of the following would not be considered a physical work characteristic?

b. a 300-pound supervisor

Examples of administrative controls include except?

c. Installation of an adjustable height keyboard tray