Electrical Wireman 2018 Past paper-Applied Science

In an atom the number of protons always equals the number of:

• orbitals

• neutrons

• electrons

• neutrons

A material that can be pounded into shape under compressive load is said to be

• malleable

• ductile

• permeable

• tensile

Which of the following is not a fundamental unit?

• Ampere

• Joule

• Kelvin

• Candela

Newton's second law of motion states:

• A body a rest stays at rest a body in motion stays in motion.

• The rate of change of momentum of a body is directly proportional to the force impressed on the body, and takes place in the direction of the impressed force.

• Force every action, an equal and opposite reaction occurs.

• The total amount of energy in a system never changes.

Matter is a anything that has:

• energy

• power

• weight

• mass

A lever is a device in the form of a rigid bar resting on a pivot used:

• for carrying loads from one end to another.

• to move a load with one end when pressure is applied to the other end.

• for moving loads over a long distance.

• to reduce loads.

The purpose of oil in a transformer is for:

• cooling

• heating

• conduction

• resistance

Which of the following best describes thermal conduction?

• Heat transfer by means of molecular agitation within a material without any motion of the material as a whole.

• Heat transfer by mass motion of fluids such as air or water when the heated fluid is caused to move away from the source of heat carrying energy with it.

• Energy transfer by the emission of electromagnetic waves which carry energy away from the emitting object.

• None of the above.

According to ohm's law, in current is infinite:

• Voltage is zero

• Resistance is zero

• Voltage is one

• resistance is one

A simple machine is a fundamental device that alters:

• the magnitude

• direction

• both magnitude and direction

• all of the above