Engineering - July 2007

my niece superglued some refrigerator magnets to the refrigerator. how do i remove them. there are two long streaks of superglue that dried. how do i remove them?

2007-07-24 09:33:15 · 5 answers · asked by karakittle 3

2007-07-24 09:16:21 · 15 answers · asked by shooter 1

2007-07-24 08:45:08 · 7 answers · asked by stevemorbitzer 2

2007-07-24 08:17:23 · 4 answers · asked by patsman2357 1

using the carbon calculator gives this figure.

2007-07-24 07:42:00 · 6 answers · asked by Anonymous

2007-07-24 07:24:19 · 4 answers · asked by anrtech 1

the mud would be very fine almost like thick whiped cream. If this wouldn't work do you have any other ideas for different kinds of injectors that would work?

2007-07-24 06:57:19 · 6 answers · asked by JoeSchmoe 2

2007-07-24 06:49:48 · 5 answers · asked by Anonymous

Only answer if you have a standard of reference that you can present and I can check.

2007-07-24 06:40:14 · 3 answers · asked by damo 2

they would have to be able to maintain structural integrity 33yards below water , or deeper, and of course be water proof. no specific price requested just the cheapest you can think of.

2007-07-24 06:33:17 · 9 answers · asked by michael n 6

A- analog meter- low resistance
B- analog meter- high resistance
C- digital meter- high resistance
D- digital meter- low resistance

2007-07-24 06:15:45 · 4 answers · asked by eric w 2

hi frnd my doubt is abt d oil compression.
like air, is d oil can be compressed into an accumulator??
and can its b used for futher power requirements????
pls help me out, frnd..........

2007-07-24 06:12:43 · 5 answers · asked by jammu 2

2007-07-24 06:07:11 · 7 answers · asked by krajasrinivas 1

I am looking to shake things up when I finish my M.S.M.E. and was just wondering which state has the best opportunity and pay for a mechanical engineer.

2007-07-24 02:34:31 · 8 answers · asked by jhirsh 2

2007-07-24 02:02:54 · 3 answers · asked by Anonymous

the only problem is when you have done the pendent search do you need to know how to build it, like all the wire connections and stuff or do they help you with it and you give basic info like what the size of the memory is and stuff

2007-07-23 23:33:48 · 5 answers · asked by Anonymous

I want to get some information about the new generation of domestic air conditioners with use natural gas to make air cool.
Now, who knows where I can find this information?

2007-07-23 23:06:30 · 3 answers · asked by Mohshar 2

2007-07-23 22:36:46 · 1 answers · asked by mamali_e 2

In "The Singularity is Near" by Ray Kurzweil, the guy scared me by saying that computers will one day be able to learn, make mistakes, and adapt to their environment - but how can they if they have no reason to adapt? Natural selection requires some motivation - - or just good programming? He also says computers can be creative, which has been, to me, always a sense of a human's freewill... is any of this possible?? I'm scared but reaaaaaaaally fascinated....

2007-07-23 17:20:16 · 4 answers · asked by Anonymous

I am an engineer, and have been fairly successful in my career.. However, I'm not really that excited about engineering and haven't been for some time. Does anyone know what else I could do with my Bachelor's in Computer Engineering besides engineering? It's hard to let go because it pays so much better than anything else I could do, but it's also slowly destroying my soul. Thanks.

2007-07-23 16:44:13 · 9 answers · asked by sleepy_grrl 3

the purpose is to design a circuit diagram for the PIR sensor to detect body temperature of a human being.and I am allowed to use any programming for this circuit.Please help to design a simple circuit diagram.I seriously need help on this.Thanks

2007-07-23 16:33:24 · 2 answers · asked by faizan k 1

2007-07-23 15:56:18 · 6 answers · asked by Anonymous

i'm building a generator powered by a bicycle that stores energy in a battery. however the battery tries to power the generator. this makes it spin opposite of the way it should. i need to overcome this and make it turn the way the wheel is turning (opposite of what the battery makes it do)

2007-07-23 15:08:31 · 4 answers · asked by Anonymous

Say you had a motor run on a nine volt battery. Would the power from the spinning axis be greater than the amount of power it uses to keep running? How could you test this?

2007-07-23 14:11:08 · 4 answers · asked by Anonymous

2007-07-23 14:10:58 · 7 answers · asked by splinterc16 1

2007-07-23 13:55:49 · 1 answers · asked by hemraj_singh59 1

Moreover on the wings and fuselage of the craft. Need very strong,durable,and also temperature resistance to any radical changes that may occur and effect any structural strength of the wings.(Hot or cold ). Also it shall b constructed for glider use at high alt. May install system for any emg.bail out or eng. failures that may occur. Nd any imput as to what internet address I can contact 4 any further info.

2007-07-23 13:38:28 · 2 answers · asked by Anonymous

1. How should the selector switch be set when checking a resistive element coil for continuity?

A. To the AC volts position
B. To the lowest DC volts range, then to a higher range until an accurate reading is obtained

C. To the OHMS position

D. To the DC amps position




2. When an AC voltage is being measured across a 15 W resistor which is carrying a current of 12 amps, the selector switch should be set to the AC voltage position of

A. 2 volts.
B. 200 volts.

C. 20 volts.

D. 1000 volts.




3. If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminals of a good fuse or circuit breaker in a 120 VAC line?

A. 0 VAC
B. 120 VAC

C. 200 VAC

D. 120 VDC




4. If the function/range switch is set at 200 VAC, what will the multimeter read if a measurement is made directly across both terminals of a blown fuse or tripped circuit breaker in a 120 VAC line?

A. 0 VAC
B. 120 VAC

C. 200 VAC

D. 120 VDC




5. Determine the current in a circuit consisting of a 1000 ohm resistor with a voltage of 50 volts DC across it.

A. 50 A
B. 20 A

C. 20 mA

D. 50 mA




6. When measuring an unknown DC voltage with your multimeter, you should first

A. set your selector switch to the lowest DC range and then move to a higher range until you can get an accurate reading.
B. set your selector switch to the highest DC voltage range and then decrease to the range that will give you the most accurate reading.

C. ground the meter.

D. ground the circuit.




7. The multimeter for this manual can measure resistances up to about

A. 2 kilohms.
B. 200 kilohms.

C. 20 kilohms.

D. 2 megohms.




8. The main reason why you should avoid bodily contact with ground while working on live electrical equipment is that such contact will

A. impair the accuracy of the measurement.
B. cause a fuse to blow.

C. damage the measuring instrument.

D. result in an electric shock.




9. Calculate the resistance of a circuit that draws 10 amps at a voltage of 120 volts.

A. 1.2 W
B. 12 W

C. 120 W

D. 1200 W




10. Calculate the power (P) in watts dissipated by a resistor of 1000 ohms with 200 volts across it.

A. .2 watts
B. 20 watts

C. 40 watts

D. 400 watts




11. To measure an unknown line voltage at an electrical outlet,

A. set the function/range switch to 1000 volts DC/V and insert the test leads in the outlet. Observe the polarity.
B. set the function/range switch to the highest ohm range and insert the test leads in the outlet.

C. set the function/range switch to 10A-DC and place the red test lead in the 10 amp jack. Insert the test leads in the outlet.

D. set the function/range switch to 750 volts ACV and insert the test leads in the outlet.




12. Assume that the function/range switch is on the 20 kW position and the multimeter displays "1" when the test leads are across an unknown resistor. What would most likely cause the meter to display "1" ?

A. A weak battery
B. The function/range switch not set on a high enough scale

C. A faulty ON/OFF switch

D. Shorted test leads




13. When measuring current, always place the meter in

A. series with the circuit.
B. the highest AC volts position.

C. the highest DC volts position.

D. parallel with the circuit.




14. Assume a device draws 50 mA of current and 150 VDC across it. What is its resistance?

A. .3 kW
B. 3000 W

C. 7.5 kW

D. 7.5 W




15. What precaution should be observed when the multimeter isn't being used?

A. The selector switch should be placed in the ohms postion.
B. The test leads should be shorted together.

C. The selector switch should be in the hFE postion.

D. The selector switch should be in the OFF position.




16. When working with electricity, the electrician should make a practice of

A. regarding electricity with fear.
B. assuming that the circuit is OFF.

C. working with the left hand in a pocket.

D. working on live equipment only.




17. When is the Common jack on the front panel used?

A. For current measurements only
B. For all functions using test leads

C. For resistance measurements only

D. For line voltage measurements only




18. If an appliance draws 10 amps and the line voltage is 110 volts, the power consumed is

A. 110 watts.
B. 1.1 kW.

C. 11 kW.

D. 1100 kW.




19. A circuit whose resistance is 22 W and has an applied voltage of 440 volts will draw a current of

A. 2 amps.
B. 20 amps.

C. 200 amps.

D. 2000 amps.




20. If an appliance is plugged in but the switch is OFF, the electrician should always consider the appliance as

A. hazardous.
B. ungrounded.

C. safe.

D. de-energized.

2007-07-23 13:12:04 · 3 answers · asked by Nother one 1

2007-07-23 13:02:22 · 3 answers · asked by Curtis W. R 2

2007-07-23 12:12:30 · 5 answers · asked by catredroses 1