ICIT Revision C

Under the WSH Act, Inspectors are empowered to enter, inspect and examine any workplace at any time to ensure

• good working habit.

• good house keeping.

• workplace safety.

• workplace cleanliness.

An example of an electrical hazard is

• protected by insulation Taps.

• frayed wires

• fungi utility poles.

• prolonged hanging

The severity level of serious injuries or life-threatening occupational diseases is classified as

• Minor

• Major

• Moderate

• Negligible

Answer explanation

One of the methods for risk control is

• accommodation.

• Illustration.

• Elimination

• regeneration.

For a three phase 400 V supply, the permitted variation is

• ± 9.2 V

• ± 16 V

• ±24 V

• ± 48 V

Supply Authority is allowed under the Electricity Regulations to vary the consumer’s voltage by not more than

• ± 4%.

• ± 6%.

• ±12%.

• ± 24%.

An installation in excess of above 100A single-phase, 230V, it becomes necessary for the incoming supply to be of 3-phase, 4-wire type in order to reduce the

• currents.

• voltage.

• power.

• energy.

In A 3-phase, 4 wire system, appliances using 230V, should be connected across the

• any phase, and neutral

• L1 and neutral only

• L2 and neutral only

• L3 and neutral only

How much current does a 50 Ω electric iron takes if the applied voltage is 250 volt?

• 0.2 A.

• 5 A.

• 50 A

• 250 A.

Power is the rate of doing work. The unit for power is

• Joules.

• watt-hour

• Joules/second

• watts/second

Answer explanation

The faster the work is done; the more power is required.

Symbol: P

Unit: Watts (W) or Joules/second (J/s)

One watt of power is obtained when a current of one ampere passes through a potential difference of one volt.