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EWRB Exam Questions with CORRECT ANSWERS
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EWRB Exam Questions with CORRECT ANSWERS
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EWRB Exam Questions with CORRECT ANSWERSQuestion 1:
A new flexible chord has been fitted, which of the following insolation resistance test
values would be correct?
A. 10 MOhm
B. 0.5 Ohm
C. 0.5 MOhm
D. 1. Ohm - ANSWER A. 10 MOhm
Question 2:
The maximum current a flexible cord can carry safely without overheating
depends mainly on:
A. The type of supply, a.c. or d.c.
B. The cross-sectional area of the flexible cord conductors.
C. The colours of the flexible cord conductors.
D. The number of cores in the flexible cord. - ANSWER B. The cross-sectional area of
the flexible cord conductors.
Question 3:
A 230V heater comprises two elements connected in series across the supply.
, If one resistance becomes open-circuited, what is the voltage across the
other resistance?
A. 0V
B. 400v
C. 690v
D. 230v - ANSWER A. 0V
Question 4:
The symbol of a square within a square on a name-plate of an electrical appliance is
used to indicate that the appliance is double-insulated.
Which one of the following terms on an appliance nameplate would also indicate that
the appliance is double-insulated.
A. Class I
B. Class II
C. All- insulated
D. 240v - ANSWER B. Class II
Question 5:
A switch controls two heating elements both of the same resistance. The settings that
can be selected on the switch are high, medium and low. When the high position is
selected on the switch, it will connect:
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