ac/dc saca study guide Exam Questions and Answers
How many degrees apart are the phases of a balanced three phase system? - -120
-What does an electrical schematic not show? - -Physical connections
-Resistance is measured in units of? - -Ohms
-What is the power formula? - -P=IxE
-What is power measured in? - -Watts
-What is the function of an inductor? - -It opposes a change in current flow
-A coil is a_________? - -Output
-Which of the following is an output? - -Solenoid
-What is the formula to solve for current? - -I=E/R
-When troubleshooting a circuit, what can be said if the total resistance of the parallel
circuit does not change when a branch is removed? - -An open exists in the removed
branch
-The unit for electromotive force (emf) is? - -Volt
-What is the relationship of the applied voltage across two electrical components in
parallel with each other? - -They are the same
-Which feature of a ground circuit creates a safe path for current? - -Low resistance to
earth
-An ohmmeter is reading total circuit resistance reads 0 ohms when all branches are
connected and reads 200 ohms when a branch is disconnected. What condition exists? - -
There is a short in the disconnected branch
-A series circuit has a total of three resistors, 5 ohms, 3 ohms, and 16 ohms. What is the Rt
of this circuit? - -24 ohms
-When testing an indicator light, one must first remove it from the circuit and place a
multimeter across its threaded area and base or input leads. What is the next step in testing
the indicator light? - -Set the meter for resistance and check the reading
-What is the secondary coil voltage of a transformer that has 120v supplied, 400 turns on
the primary and 100 turns on the secondary? - -30v
How many degrees apart are the phases of a balanced three phase system? - -120
-What does an electrical schematic not show? - -Physical connections
-Resistance is measured in units of? - -Ohms
-What is the power formula? - -P=IxE
-What is power measured in? - -Watts
-What is the function of an inductor? - -It opposes a change in current flow
-A coil is a_________? - -Output
-Which of the following is an output? - -Solenoid
-What is the formula to solve for current? - -I=E/R
-When troubleshooting a circuit, what can be said if the total resistance of the parallel
circuit does not change when a branch is removed? - -An open exists in the removed
branch
-The unit for electromotive force (emf) is? - -Volt
-What is the relationship of the applied voltage across two electrical components in
parallel with each other? - -They are the same
-Which feature of a ground circuit creates a safe path for current? - -Low resistance to
earth
-An ohmmeter is reading total circuit resistance reads 0 ohms when all branches are
connected and reads 200 ohms when a branch is disconnected. What condition exists? - -
There is a short in the disconnected branch
-A series circuit has a total of three resistors, 5 ohms, 3 ohms, and 16 ohms. What is the Rt
of this circuit? - -24 ohms
-When testing an indicator light, one must first remove it from the circuit and place a
multimeter across its threaded area and base or input leads. What is the next step in testing
the indicator light? - -Set the meter for resistance and check the reading
-What is the secondary coil voltage of a transformer that has 120v supplied, 400 turns on
the primary and 100 turns on the secondary? - -30v
