Recent questions tagged insulation

Description : Are there any crawl space experts out there?

Last Answer : answer:Anything that I've seen done, or have tried myself, only made the nesting places that much safer and warmer. I recommend getting an estimate to have the job done by a contractor. That's one ... save very few dollars doing it myself. You can also pick the estimator's brain while they're there.

Description : How can you reuse a can of "Great Stuff" expanding foam by Dow?

Last Answer : I’ve never been able to—didn’t think it was possible. I avoid using it until the job requires close to a full can. Be sure to wear gloves & old clothing. I’ve also had a fair number of brand new cans from which nothing came out the nozzle. Maybe they should call it “Not-So-Great Stuff”.

Description : How to Install Insulation in Older Residences

Last Answer : How to Install Insulation in Older Residences Today's energy needs are a mounting concern for most homeowners. Making sure that your old home is adequately insulated will not only lower energy ... like sliding doors and entry doors to garages where strip insulation can be stapled in place.

Description : Name the method used to measure following resistances:- (i) Low resistance (ii) Medium resistance (iii) Insulation resistance (iv) Earth resistance.

Last Answer : Following are the methods used to measure resistances:-  (i) Low resistance: 1.Voltmeter-Ammeter Method 2. Kelvin's Double bridge Method  (ii) Medium resistance: 1.Voltmeter-Ammeter Method 2. ... of Charge Method  (iv) Earth resistance : 1. Fall of Potential Method 2. Earth tester

Description : If the insulation resistance of a cable of length 10 km is 1 mega ohm, its insulation resistance for 50 km length will be

Last Answer : If the insulation resistance of a cable of length 10 km is 1 mega ohm, its insulation resistance for 50 km length will be 0.2 mega ohm

Description : When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially short circuited because  (A) Cables have a low value of capacitance which draws a high ... high value of charging current (D) Cables have a low value of capacitance and initial resistance

Last Answer : When measuring insulation resistance of cables using d.c. source, the galvanometer used should be initially short circuited because Cables have a high value of capacitance which draws a high value of charging current

Description : The thickness of insulation provided on the conductor depends on?

Last Answer : The thickness of insulation provided on the conductor depends on the magnitude of voltage on the conductor.

Description : The insulation on a current carrying conductor is provided?

Last Answer : The insulation on a current carrying conductor is provided to prevent leakage of current, to prevent shock.

Last Answer : Meggar is an instrument which measures the insulation resistance of an electric circuit relative to earth and one another.

Last Answer : Insulation resistance of high voltage circuit breakers is more than 100 mega ohms.