Direct current motors Study guides, Study notes & Summaries

Three transmission methods are - Answer-Symplex, half duplex, full duplex The choice of a specific transport medium is influenced by 5 economics and technical considerations such as the: - Answer-Physical construction, type of services, topology and size of the network, transmission path distance, transmission performance characteristics of the cabling. Twisted pair cable is called balanced cable because: - Answer-The physical construction of both conductors and the associated connections t...

Nccer electrical Level 2 Module 2Any exposed live parts must be guarded if they are operating at 50V or more between terminals Which of the following are most likely to use dynamic braking? Forklifts In a DC series motor, how much of its full-load torque is developed at starting? 500% For a given number of poles, which of the following determines the speed of an AC motor? Frequency Which of the following motors is used where the required starting torque is high and speed ...

True - Answer- Across-the-line starting is the simplest of all starting methods. False - Answer- Across-the-line starting is only used for alternating current. True - Answer- The type of bars used to construct the rotor has a great effect on the operating characteristics of the motor. False - Answer- Direct current motors depend on inductive reactance to limit current flow. True - Answer- Contactors intended to connect direct current motors to the line often have arc suppression and ...

HVAC Electricity Exam Questions with Correct Answers Amp Rating and Breaker size for - #14, #12, #10, #8, #6, #3 - Answer-14-15,15 12-20,20 10-30,30 8-45,40 6-65,60 3-105,100 Residential lighting and receptacle circuits use what type of wire? - Answer-14-2 AWG (14-gauge, 2-wire, plus bond) conductors Ampacity - Answer-The amount of current a conductor is rated to handle safely. NMD - Answer-Non-metallic-sheathed cable(dry) - for exposed wiring in dry or damp locations NMW - ...

Stationary Engineer Electric Exam Questions and Answers Latest 2024/2025 (Graded A+) An AC circuit consists only of a pure inductance and a power source. The relationship between the voltage and the current in this circuit is that the - Answer current lags the voltage The power factor of a load is equal to the ____________ power divided by the ____________ power. - Answer True ; apparent A 10-ohms and 20-ohms resistor are connected in parallel. The total line current drawn by this parallel...

_______ can be generated. I. Electricity II. Electrical Energy a. I only b. II only c. both I and II d. neither I nor II - Answer Ans. b A phenomenon where a circuit stores electrical energy is called ______. a. Inductance b. Capacitance c. Resistance d. Susceptance - Answer Ans. b A general term including material, fittings, devices, appliances, fixtures, apparatus, and the like used as part of, or in connection with, an electrical installation is ______. a. premises wiring (s...

How many wires do you need to transmit 3 phase power correct answers 3 wires The code defines a "continuous" load as one in which the load is likely to continue for _ hour or more. correct answers 3 A transformer can be fed off the secondary feed. (T/F) correct answers True According to code, a wire located in a partially protected area such as under a roofed open porch would be located in? correct answers A damp location Article 100 informational note In dealing with motors and r...

Accumulated Depreciation - ANSWER-The total decrease in an item's value over a period of time. Formula: (Annual Depreciation x Number of years used) Actual Cash Value (ACV) - ANSWER-A valuation method used by insurers to reflect an item's current market value right before being damaged or destroyed. Formula: (Replacement cost - Accumulated Depreciation) Adhesion - ANSWER-One of the characteristics of an insurance contract. Means that one party (the insurer) sets the terms, and the other ...

Att Test 3 Exam With 100% Correct Answers 2023 Henry The basic unit of inductance Contracts If the circuit current decreases, the magnetic field of an inductor Concentrate a magnetic field The inductor is used to varies The physical appearance of inductors Print or color code Inductors have the value of their inductive capacity by Air and iron The common inductors are Core type Inductors are commonly identified by their Capacitor leads Wh...

WTP Certification Questions Which of the following is a type of pump commonly used in water treatment plants? - Centrifugal What is a multistage pump? - Has more than one impeller If the pump impeller is running backwards, what action must be taken to correct the rotation? - Switch any two electrical leads When should the packing of a pump be adjusted? - When the pump is running When a pump fails to deliver at its rated capacity, what is the most likely cause? - Air leak What...