Sample Questions from AED Pre-employment Assessment for Technicians
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Basic Mechanical
Mobile Electrical
Mobile Hydraulics

Basic Mechanical

  1. What is torque?
    Basic Physics

    1. a measurement of speed
    2. a force measured over an area
    3. a twisting or rotational force
    4. a force, pressure or voltage causing something to move

  2. What is this type of mounting configuration?
    Linear Actuators



    1. rigid – free
    2. simple – simple
    3. rigid – simple
    4. rigid – rigid

  3. How can disc clutches be actuated?
    Clutches

    1. electrically
    2. pneumatically
    3. manually
    4. all of the above

  4. What is a possible result of an excess of bearing lubricant?
    Bearings

    1. in worm gear drives
    2. under severe operating conditions
    3. for rust and oxidation
    4. under moderate loads

  5. When are synthetic lubricants most suitable?
    Gears

    1. The shaft spins in the inner race.
    2. The shaft seizes up on the bearing.
    3. The outer race seizes up
    4. The operating temperature rises rapidly.

  6. What is the width of a 32XXH100 belt?
    Drives

    1. 3.2 in
    2. 1.0 in
    3. 1.25 in
    4. 12.5 in
Mobile Electrical

  1. What is the voltage drop across a length of wire with 12 A flowing through a resistance of 30 ohms?
    Electrical Fundamentals

    1. 36 V
    2. 3.6 V
    3. 360 V
    4. 3 V

  2. In a series circuit, how much current flows through each loop?
    Circuit Analysis

    1. The current is equally distributed in each component.
    2. Current varies according to each component type and value.
    3. Current values in each component cannot be predicted
    4. Current in each element equals one over the sum of the reciprocals.

  3. Which of the following is an advantage a digital multimeter has over an analog meter?
    Electrical Testers

    1. more compact
    2. more accurate
    3. more versatile
    4. all of these

  4. What does a transistor do?
    Circuit Components

    1. It uses small current to control large current.
    2. It is an electronic amplifier.
    3. It is an electronic switch.
    4. All of the above.

  5. What is the purpose of the neutral safety switch?
    Charging & Starting Systems

    1. It prevents current from going to the starter motor after the engine has started.
    2. It removes electricity from wires that are not in use
    3. It prevents the engine from starting if the vehicle is not in neutral or park.
    4. It automatically cuts out the battery if a short is detected.
Mobile Hydraulics

  1. What causes pressure in a hydraulic system?
    Fluid Power Physics

    1. resistance to torque
    2. type of piping
    3. flow rate of fluid
    4. resistance to flow

  2. Which kind of pump would be used in an open circuit hydrostatic transmission?
    Hydrostatic Transmissions

    1. fixed displacement
    2. variable displacement
    3. pressure compensated
    4. all of the above

  3. Which type of pressure control valve does this schematic symbol represent?
    Pressure Control



    1. pressure relief valve
    2. pressure reducing valve
    3. pressure compensated flow control valve
    4. reducing valve

  4. What is the function of a power beyond sleeve in a directional valve assembly?
    Directional Control Valves

    1. It allows fluid to be ported through the outlet
    2. It makes the directional control valve an open center
    3. It converts the directional control valve to closed center
    4. It powers the directional valve assembly

  5. What is the purpose of anti-foaming additives?
    Fluid Conditioning

    1. It allows entrained air to escape faster.
    2. It allows the oil to cool faster.
    3. It prevents oxidations.
    4. It keeps the oil smoother.

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