PG TRB Model Question Papers with Answer 2020-21 - 2

Question: 6

Mineral waxes are rich in

(A) Carbohydrates

(B) Poly alcohols

(C) Poly ethers

(D) Hydrocarbons

Question: 7

Which of the following substances has the lowest specific gravity?

(A) Iron

(B) Brass

(C) Gold

(D) Marble

Question: 8

White coal is

(A) Hydro-electricity

(B) Diamond

(C) Uranium

(D) Ice

Question: 9

Of the following, which one is the best insulator?

(A) Wood

(B) Paper

(C) Cloth

(D) Glass

Question: 10

Interactive service for transmission and reception of messages on printed medium through telephone lines is known as

(A) Phonograph

(B) Teleprint

(C) Telefax

(D) Teletext