ASVAB Test 10 - Electrical Knowledge

When you try and start an engine, you hear a clicking sound but nothing happens. What is the potential problem?. Dead battery. Excessive resistance in the solenoid. Faulty starter. All of the above.

What type of wrench is pictured?. Crescent wrench. Pipe wrench. Ratchet wrench. Combination wrench.

What type of clamp is this?. Bar clamp. Pipe clamp. Miter clamp. Parallel clamp.

Which type of saw is designed to make accurate crosscuts at specific angles?. Miter saw. Swing saw. Rip saw. Pad saw.

Ohm's law states: Voltage = Current ֳ— Resistance. Amperes = Current ֳ— Resistance. Voltage = Resistance ֳ· Amperes. Ohms = Voltage ֳ· Current.

Which of the following materials usually has an electromagnetic-induction device in its core?. brass. silver. aluminum. iron.

How many diodes should you expect to find in a bridge rectifier?. 0. 4. 8. 10.

Another name for cycles per second is __________. watts. voltage. hertz. amperes.

Newer cell phones contain a removable memory card, which is often called a __________. SIM card. DIM chip. PIN card. Pin chip.

When current flows through a wire, the following influences are present __________. amperes and ohms only. voltage, watts, and ohms only. voltage and amperes only. voltage, ohms, and amperes.

Millihenries are related to __________. capacitors. inductors. relays. transformers.

Radar can operate at frequencies as high as __________. 100,000 Hz. 100,000 kHz. 100,000 MHz. 500,000 MHz.

Radio waves travel __________. at the speed of light. at the speed of sound. faster than the speed of light. faster than the speed of sound but slower than the speed of light.

Changing alternating current to direct current is called __________. capacitance. impedance. rectification. induction.

Insulated fittings can be used to splice wires, thus eliminating the need for __________. cleaning the wires. removing the plastic coating from the wires. twisting the wires together. soldering the wires together.

The symbol shown above stands for __________. battery. transformer. capacitor. resistor.

How many wires do serial cables used on computers have?. 3. 9. 15. 25.

To produce greater storage of electrons and more capacitance, capacitors should __________. be connected in parallel. be connected in series. have more voltage applied to them. be eliminated.

A light bulb is 60 watts. Operated at 120 volts, how much current does it draw?. 0.5 ampere. 5.0 amperes. 50.0 amperes. 7.200 amperes.

A number-12 wire, compared to a number-6 wire __________. is longer. is shorter. is smaller in diameter. is larger in diameter.

A fuse with a higher-than-required rating used in an electrical circuit __________. improves safety. increases maintenance. may not work properly. is less expensive.

Neutral wire is always __________. whitish or natural. black. green. blue.

To measure electrical power, you would use a(n) __________. ammeter. ohmmeter. voltmeter. wattmeter.

If you operate an incandescent light bulb at less than its rated voltage __________. the bulb will burn brighter and last longer. the bulb will burn dimmer and last longer. the bulb will burn brighter but won't last as long. the bulb will burn dimmer but won't last as long.

Two electrical wires run to a machine. One wire is 6mm thick, and the other is 3mm thick. For the two wires to carry the same current, the larger wire __________. requires less voltage. requires more voltage. requires the same voltage. It can't be determined from the information given.

Which of the following isn't a component of a DC motor?. rotor bars. armature. field poles. yoke.

A current passed through a muscle in the human body causes the muscle to contract. This is known as __________. the chemical effect of current. the biological effect of current. the magnetic effect of current. the physiological effect of current.

In a closed electrical circuit __________. one terminal is always positive, and one terminal is always negative. both terminals can be positive. both terminals can be negative. terminals are neither positive nor negative.

What does RMS stand for?. Root Mean Square. Resistance Measurement System. Real Metric Standards. Realistic Matrix Stems.

The symbol above is a/an __________. resistor. fuse. capacitor. inductor.

The television broadcast standard used in the United States is __________. PAL. NTSC. SECAM. SSTC.

The symbol above is a/an __________. lamp. fuse. inductor. bell.

When a circuit breaker trips, in what position will you find the operating handle?. on position. off position. half way between on and off. three-fourths of the way between the on position and the off position.

Which wire is smallest?. 00 AWG. 4 AWG. 10 AWG. 12 AWG.

The symbol above stands for __________. battery. inductor. transformer. diode.

How many paths of electrical flow can be found in a series circuit?. one. two. two or more. It can't be determined from the information given.

A microwave is rated at 1,200 watts. At 120 volts, how much current does it draw?. 1 amp. 10 amps. 100 amps. 1,440 amps.

Electricians use the term low potential to refer to __________. electrical circuits with a low potential for overload. building codes that reduce the risk of fire. the likelihood of getting a raise this year. 600 watts or less.

Which of the following isn't a conductor of electricity?. water. graphite. gold. glass.

The ground wire is always __________. green. black. whitish. blue.

To cause a current of 10 amperes to flow through 20-ohm resistance, the voltage needed is __________. 20 volts. 1 volt. 10 volts. 200 volts.

Silver is a better conductor than copper. But copper is more often used because of __________. the cost of silver. the strength of copper. the low melting point of silver. the tendency of silver to tarnish.

Electronic circuits that produce high frequency AC are called __________. amplifiers. regulators. transformers. oscillators.

If you plug an appliance designed for AC into a DC power source, the appliance __________. will operate normally. will produce excessive heat. won't operate. will explode into tiny pieces.

What effect does a speaker wire's gauge have on speaker sound quality?. higher gauge wires are thicker with better sound quality. lower gauge wires are thicker with better sound quality. lower gauge wires are thicker with lesser sound quality. hire gauge wires are thicker with lesser sound quality.

What's the primary advantage of a quad band cell phone over a dual-band cell phone?. transmission strength. coverage area. reception strength. smaller phone size.

When working with electricity, you should assume that all electrical equipment is alive unless you know for certain otherwise. This prevents __________. damage to circuits. personal injury. unnecessary labor. overheating the equipment.

The heat effect of current is created __________. when the pressure of the current in the wire breaks up impurities in the wire, creating heat. when the current in the wire decays electrons, causing them to move more quickly, creating heat. when the current overcomes resistance in the wire, creating heat. The heat effect of current is only theoretical; it has never been proven to exist.

What special type of diode is commonly used to regulate voltage?. capacitor. transistor. Zener diode. LED.

This symbol means __________. ohm. ampere. high voltage. wattage.