Unit 661 – Multiple choice practice exam

Which of the following is a unit of mass?

• Newton

• Newton per square metre

• Kilogram

• Metre

Which defines power the best

• Power is proportional to the square of the time taken

• Power is done when a force is moved through a distance

• Power is the quality of the energy

• Power is the rate of consumption of energy

Which best defines work

• Work is the rate of consumption of energy

• Work is the quality of energy

• Work is done when a force is moved through a distance

• Work is proportional to the square of the time taken

From Table 1, which of the following lists the density from low density to high density

• Gold/Silver/Copper/Steel/Aluminium

• Aluminium/Steel/Copper/Silver

• Steel/Copper/Aluminium/Gold/Silver

• Copper/Aluminium/Steel/Silver/Gold

A current of 20 A flows on a conductor of length 100mm which is at right angles to a magnetic field of flux density 0.8 T. The force exerted on the conductor would be

• 1.6 N

• 160 N

• 0.16 N

• 16 N

Which is the correct relationship between voltage, current and resistance

• R = VI

• V = IR

• I = R/V

• V = I/R

Which two properties affects the voltage drop along a cable

• Area and type of insulation

• Resistivity and density

• Resistivity and length

• Area and tensile strength

A disconnected cable may be live because of which of the following

• Mutual Inductance

• Lenz's Law

• A decrease in temperature

• Increased conductivity

Energy may be stored in a cable due to

• Resistance

• Capacitance

• Impedance

• Conductivity

A magnetic field strength depends on

• Distance and flux

• Flux and cross sectional area

• Cross sectional area and distance