JOURNEYMAN CLOSED BOOK # 7 Exam

JOURNEYMAN CLOSED BOOK # 7 Exam C -Answer-An advantage that rubber insulation has is that ______________. a. Is not damage by oil b. Is a good for extreme temperatures c. Does not absorb much moisture d. Will not deteriorate with age C -Answer-The advantage of using a storage battery rather than a dry cell is the storage battery ________. a. Is portable b. Is less expensive c. Can be recharged d. Is easier to use D -Answer-The least desirable device for measuring an electrical cabinet containing live equipment is a ____. a. 6' wooden ruler b. Plastic ruler c. Wood yardstick d. 12' steel pipe B -Answer-The relationship of a transformer primary winding to the secondary winding is expressed in ____. a. Wattage b. Turns-ratio c. Current d. Voltage B -Answer-When the size #12 of a stranded wire is referred to, this number specifies the _______. a. Strength of the wire b. Cross-sectional area of the wire c. Square inch area of the insulation d. The pounds per square inch B -Answer-The purpose of a clip clamp is to ________. I. Ensure good contact between the fuse terminals of cartridge fuses and the fuse clips II. Make it possible to use cartridge fuses of a smaller size than that for which the fuse clips are intended III. Prevent the accidental removal of the fuse due to vibration a. I, II & III b. I only c. II only d. I & II only B -Answer-To increase the life of an incandescent light bulb you would ________. a. Use at a higher than rated voltage b. Use at a lower than rated voltage c. Turn off when not in use d. Use at a higher wattage A -Answer-Which of the following statements about mounting single-throw knife switches in a vertical position is (are) correct? I. The switch shall be mounted so that the blade hinge is at the bottom II. The supply side of the circuit shall be connected to the bottom of the switch a. I only b. II only c. Both I & II d. Neither I & I C -Answer-When re-routing conduit, it may be necessary to increase the wire size, if the distance is greater, in order to __________. a. Account for current drop b. Allow for possible resistance drop c. Compensate for voltage drop d. Account for ampacity drop D -Answer-One megohm is the equivalent of __________. a. 100 ohms b. 1000 ohms c. 100,000 ohms d. 1,000,000 ohms D -Answer-On smaller gauges of wire, they are pencil-stripped to prevent ___________. a. Over stripping b. loosening of the wire nut c. Nicks the wire d. Other C -Answer-Galvanized conduit is made of __________. a. Iron b. Zinc c. Nickle d. Lead A -Answer-The frame of a motor is usually positively grounded to _________. a. Protect against shock b. Remove the static currents c. Provide 115 volts d. Protect from lightning A -Answer-When wrapping a splice with both rubber and friction tape, the main purpose of the friction tape is to _____. a. Provide extra insulation b. Build up the insulation to the minimum thickness required c. Protect the rubber tape d. Provide a waterproof sea C -Answer-An electrician should not wear shoes that have sponge rubber soles while working mainly because they __________. a. Wear out too quickly b. Are not waterproof c. Are not insulated d. Are easily punctured when stepping on a nail C -Answer-The transformer output is measured by __________. a. Volts b. Amps c. Volt-amps d. Watts D -Answer-Which of the following hacksaw blades should be used for the best results in cutting EMT? a. 12 teeth per inch b. 18 teeth per inch c. 24 teeth per inch d. 32 teeth per inch D -Answer-So constructed or protected that exposure to the weather will not interfere with successful operation is __________________. I. Weather proof II. Raintight III. Watertight a. I only b. II only c. I & II only d. I, II & III C -Answer-The rating of the largest size regular plug fuse is ____ amperes. a. 15 b. 20 c. 30 d. 60 A -Answer-A hacksaw with fine teeth used to cut raceways is commonly called a ______________. a. Tube saw b. Keyhole saw c. Sabre saw d. Crosscut saw B -Answer-You shouldn't use a file without a handle because ____________. a. The file is hard to hold b. The user may be injured c. The file will cut too deep d. Improper filling stroke D -Answer-The brightness of an incandescent lamp is rated in _________