10,000+ General Awareness Questions with Answers 2023 - 2

Question: 6

In a power transformer, for maximum efficiency at a given load,

(A) there is no correlation between frequency and losses

(B) copper loss must be greater than iron loss

(C) copper loss must be equal to iron loss

(D) copper loss must be less than iron loss

Question: 7

An air bubble in water shines because of the phenomenon of

(A) total internal reflection

(B) refraction

(C) diffraction

(D) dispersion

Question: 8

The most abundant of the rare gases in the air is

(A) argon

(B) ammonia

(C) hydrogen

(D) ozone

Question: 9

Which of the following mineral crystallizes in hexagonal system?

(A) quartz

(B) gypsum

(C) flint

(D) all of the above

Question: 10

The voltage drop across the electrodes of a mercury pool rectifier

(A) is almost independent of load current

(B) varies inversely as load current

(C) varies linearly with the load current

(D) varies exponentially with the load current