Before using a voltage tester, check to make sure it is functioning correctly by _____
A) touching the leads together
B) connecting it to a known energized source
C) grounding the leads
D) checking it with a multimeter
Answer: B
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Answer the following statement(s) true (T) or false (F)
1. Circuits with capacitance or inductance are called reactive circuits, and the total opposition to current flow is called impedance (Z). 2. An R-C circuit consists of resistance and inductance. 3. True power is used in resistive components and is measured in amperes. 4. In a purely capacitive AC circuit, all of the energy is stored in the capacitor during part of the cycle and then returned to the circuit during another part of the cycle. 5. When resistance and inductance are both in a circuit, the phase between voltage and current is less than 90 degrees.
A buck-and-boost transformer has a primary current of 10A and transformation ratio of 10:1. What is the secondary current?
a. 0.1A b. 1A c. 10A d. 100A
Which of the following can cause abnormally high DPF intake temperatures?
A. restricted boost air heat exchanger B. high air filter inlet restriction C. high altitude operation D. any of the above
A shipment of 356 automobile headlight lamps is dropped during delivery. The number of broken lamps is 25% of the shipment. How many lamps are broken?
A. 67 B. 78 C. 89 D. 100