IECRM HW 122

A ___ branch circuit is connected to the electric furnace in the EWR residence. Select one: a. 240-volt, 70-amp b. 240-volt, 50-amp c. 120-volt, 20-amp d. 208-volt, 70-amp

a

A circuit is energized. When you touch the probes (leads) of a voltmeter across the terminals of a single-pole switch that is in the OFF position, you are completing the circuit and current flows through the meter's resistance. Select one: a. True b. False

a

A circuit is energized. When you touch the probes (leads) of a voltmeter across the terminals of a single-pole switch that is in the OFF position, you are completing the circuit. Select one: a. True b. False

a

Complete the following verbatim Code statements or provide the NEC® reference.Frames of electric ranges, wall-mounted ovens, counter-mounted cooking units, clothes dryers, and outlet or junction boxes that are part of the circuit for these appliances shall be connected to the equipment grounding conductor in the manner specified by ___. Select one: a. 250.134 or 250.138 b. 250.124 or 250.126 c. 250.130 or 250.138 d. 250.132 or 250.136

a

Complete the following verbatim Code statements or provide the NEC® reference.The NEC® requirement that "each electric appliance shall be provided with a nameplate giving the identifying name and the rating in volts and amperes, or in volts and watts" is located in Article ___. Select one: a. 422 b. 680 c. 410 d. 230

a

Complete the following verbatim Code statements or provide the NEC® reference.The rating of an individual branch circuit conductors shall not be less than ___ or the marked rating of an appliance having combined loads as provided in 422.62. Select one: a. the marked rating of the appliance b. the maximum current rating c. the minimum voltage rating d. the overcurrent size

a

Defective tools are ___ and should not be used. Select one: a. dangerous b. costly c. expensive d. none of these

a

Does the NEC® permit a 2-pole circuit breaker to be used as the disconnecting means for a 3.3 KVA, 240-volt, 1Ø air compressor? The equipment is installed in the electrical room with and is within sight of the circuit breaker panelboard. Select one: a. Yes b. No

a

For the EWR residence, the disconnecting means for the submersible water pump is within sight of the ___. Select one: a. controller b. motor c. both a & b

a

Tools ___ an important part of our jobs. Select one: a. are b. are not

a

When can guards on tools be removed or modified to suit your needs? Select one: a. never b. occasionally c. as required d. seldom

a

With the switch in the position shown below, the voltmeter will indicate a reading of ___ volts. Select one: a. 12 b. 0 c. 24 d. 120

a

A permanently connected electric water heater ___ permitted to be supplied by a flexible cord connection. Select one: a. is b. is not

b

A water heater has a nameplate rating of 5 KW @ 230 volts. This water heater will draw ___ amperes when operated at the rated voltage. Select one: a. 22.68 b. 21.74 c. 20.83 d. 46.0 e. 19.69

b

Complete the following verbatim Code statements or provide the NEC® reference.According to Article 422, an accessible separable connector or an accessible ___ shall be permitted to serve as the disconnecting means for cord-and-plug-connected appliances. Select one: a. device b. plug and receptacle c. panel d. method

b

Double-insulated tools are designed to keep your hands warm when using them. Select one: a. True b. False

b

Figure 112.711Refer to Figure 112.711. With voltmeter leads placed on the terminals on the luminaire, the meter should indicate a reading of ___ volts. Switch 1 is ON and Switch 2 is OFF. Select one: a. 240 b. 0 c. 24 d. 120 e. 12

b

It is ok to use home-made tool attachments for a short time to finish your work. Select one: a. True b. False

b

All fixed storage water heaters of 120 gallons or less are required to have a branch circuit over current device and conductor rating of not less than ___ percent of the nameplate rating of the water heater. Select one: a. 100 b. 170 c. 125 d. 140

c

Before applying power to an electric water heater, ___. Select one: a. combustible materials within 50 feet should be removed b. superheated water should be released through the relief valve c. the tank must be full of water d. all heating elements should be jumpered together on both ends

c

Figure 112.711Refer to Figure 112.711. With Switch 1 OFF and voltmeter leads placed between the switch terminals (on Switch 1), the meter should indicate a reading of ___ volts. Select one: a. 240 b. 24 c. 0 d. 120 e. 12

c

For the EWR residence, what voltage does the food-waste disposal show on the special purpose outlet schedule? Select one: a. 120/240 volts b. 208 volts c. 120 volts d. 240 volts

c

It is important to wear your ___ when using any tool. Select one: a. rubber gloves b. eye protection c. PPE d. hard hat

c

Operating a 240-volt water heater (or other resistive load) at 208 volts will result in ___ heat output (in watts) and a ___ life. Select one: a. lower, shorter b. higher, longer c. lower, longer d. higher, shorter

c

Re: EWR plans & specs. The dual-element fuses that are recommended for back-up (supplemental overcurrent) protection on the water pump are rated at ___ amps. Select one: a. 3 b. 5 c. 10 d. 15

c

The NEC® permits a ___ to be used as the disconnecting means for a 2.9 KVA, 240-volt, 1Ø air compressor.I. 2-pole circuit breaker II. 2-pole switch (DPST) Select one: a. I only b. II only c. either I or II d. neither I nor II

c

Using a power tool with a broken ground prong is ___ permitted. Select one: a. occasionally b. always c. never d. seldom

c

With the switch in the position shown below, the voltmeter will indicate a reading of ___ volts. Select one: a. 12 b. 120 c. 0 d. 24

c

Compared to using corded tools, cordless tools provide ___ productivity. Select one: a. adjusted b. eliminated c. decreased d. increased

d

Figure 119.712 Refer to Figure 119.712. With Switch 1 ON and voltmeter leads placed between the switch terminals (on Switch 1), the meter should indicate a reading of ___ volts. Select one: a. 24 b. 12 c. 240 d. 0 e. 120

d

Figure 119.712 Refer to Figure 119.712. With voltmeter leads placed on the terminals on Luminaire B, the meter should indicate a reading of ___ volts. Both switches are ON. Select one: a. 0 b. 24 c. 240 d. 120 e. 12

d

For the EWR project, the breaker for the water heater circuit has a rating of ___ amps. Select one: a. 40 b. 15 c. 20 d. 30

d

On the EWR plans, the water pump is located in the ___. Select one: a. garage b. kitchen c. living room d. workshop

d

Re: EWR plans & specs. The water pump is located in the ___ corner of the house. Select one: a. southwest b. northwest c. northeast d. southeast

d

Re: EWR plans & specs. What is the horsepower rating of the water pump? Select one: a. 1/2 b. 1/6 c. 2 d. 1

d

When you are finished using a tool, return it to the ___. Select one: a. shop b. truck c. person who previously used it d. correct storage place

d

Figure 112.711Refer to Figure 112.711. With Switch 2 OFF and voltmeter leads placed between the switch terminals (on Switch 2), the meter should indicate a reading of ___ volts. Select one: a. 12 b. 240 c. 24 d. 0 e. 120

e