Questions

Q:

_____ mirror is used in the headlights of cars.

A) Semi-circular B) Conical
C) Convex D) Concave
 
Answer & Explanation Answer: D) Concave

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Q:

Optical fibre works on which of the following principle of light?

A) Reflection B) Refraction
C) Diffraction D) Total internal reflection
 
Answer & Explanation Answer: D) Total internal reflection

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Q:

A page fault occurs when

A) the page is not found in the memory B) the Deadlock happens
C) the page is found in the memory D) the Segmentation starts
 
Answer & Explanation Answer: A) the page is not found in the memory

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Q:

According to the Indus water treaty which river will be not governed by Pakistan?

A) Indus B) Chenab
C) Jhelum D) Ravi
 
Answer & Explanation Answer: D) Ravi

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Q:

Which one of the following countries is not a member of the "BRICS" group?

A) Brazil B) Russia
C) China D) Indonesia
 
Answer & Explanation Answer: D) Indonesia

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Q:

The O-T-C medicine Crocin is an

A) Analgesic B) Antipyretic
C) Analgesic and antipyretic D) Antiseptic
 
Answer & Explanation Answer: C) Analgesic and antipyretic

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Q:

In the following question, out of the four alternatives, select the word similar in meaning to the word given.

Cantankerous

A) Humorous B) Quarrelsome
C) Remorseful D) Dullness
 
Answer & Explanation Answer: B) Quarrelsome

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Q:

Which   one   of   the   following   is   not   a semiconductor?

A) Silicon B) Germanium
C) Quartz D) Gallium arsenide
 
Answer & Explanation Answer: C) Quartz

Explanation:

Semiconductors are the basic materials used in the present solid state electronic devices like diode, transistor, ICs, etc. 2. Lattice structure and the atomic structure of constituent elements decide whether a particular material will be insulator, metal or semiconductor. Semiconductors are elemental (Si, Ge) as well as compound (GaAs, CdS, etc.). Silicon, Germanium, Gallium Arsenide are semiconductors, but Quartz is an insulator.

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