NOCTI practice Exam 2023 Questions and Answers

A _______ fire extinguisher should be used on an electrical fire - Answer- Class C A __________ fire extinguisher ordinary combustible materials such as paper, wood, cardboard, and most plastics. - Answer- Class A A Safety Data Sheet (SDS) provides information about first aid measures, stability and reactivity, and - Answer- handling and storage What safety practice is used to prevent equipment from being energized? - Answer- lockout/tagout Overload protection is designed to protect the _______ by disconnecting it from the power source when an overload is sensed. - Answer- electric motor A motor _______ is a motor controller that includes overload protection. - Answer- starter An ohmmeter is used to measure - Answer- resistance Which of the following is used to measure a current - Answer- ammeter In an AC current, if resistance remains the same and voltage is doubled, then current - Answer- is doubled If the voltage source supplies 260 volts and the resistance measures 5 ohms, the current is - Answer- 52 amps An electronic device runs on a 36-volt supple and takes 11 amps. What is its power? - Answer- 396 watts Every digital multimeter can measure three basic things- current, voltage and - Answer- resistance The approximate peak-to-peak value of an alternating current signal that measures 240Vrms is - Answer- 678.8 volts In residential structures, GFCI is required in - Answer- Kitchens What article in the National Electrical Code covers motors, motor branch-circuit and feeder conductors and their protection? - Answer- Article 430 The transformer winding to which the line is connected is called ________winding - Answer- primary An electric motor is used to change - Answer- electrical energy into mechanical energy the winding ration of a ______transformer has a rating of 3:1 winding ratio. - Answer- step-down In a full wave bridge rectifier, which of the following components is used to reduce AC ripple? - Answer- capacitors What is the resistance total for 4 (four) 1,000 ohm resistors connected in parallel? - Answer- 250 ohms What is resistance total for a 560 ohm, 1 k ohm and 3.3 k ohm resistors in series. - Answer- 4,400 ohms The binary equivalent of 74 is - Answer- The purpose of a mechanical transmission system is to transmit _____and ______ from one device to another. - Answer- force , motion Three principles used in the operation of automated machinery are electrical, _______, and fluid power - Answer- mechanical Which of the following directional control valve is used for positioning. - Answer- 4/3 Fluid pilot operated control valves are activated by - Answer- system pressure The formula F=P x A for calculating theoretical forces produce by a pneumatic or hydraulic cylinder is known as - Answer- Pascal's Law The robot's work envelope, controller, and _______ make up the area called the work cell. - Answer- peripheral devices What is used for repetitive sequence motion in manufacturing industries. - Answer- Robots