An alternating current instead of direct current is used in long-distance electric transmission because:

• it is easy to generate
• rectification is possible
• energy losses are minimum
• it causes fewer accidents
Solution
Correct Option: C  [ energy losses are minimum ]

Explanation:

A device that is responsible for changing the voltage is:

• Transformer
• Encoder
• Decoder
• Translator
Solution
Correct Option: A  [ Transformer ]

Explanation:

Cuscuta is a :

• Parasite
• Saprophyte
• Epiphyte
• Xerophyte
Solution
Correct Option: A  [ Parasite ]

Explanation:

Pure water freezes at a temperature:

• 47°F
• 32°F
• 0°F
• 19°F
Solution
Correct Option: B  [ 32°F ]

Explanation: Ordinarily, the freezing point of water and melting point is 0°C or 32°F.

"Zoonosis" refers to any disease or infection that is naturally transmissible from:
(i) human to human
(ii) animal to human
(iii) animal to animals
(iv) bird to animal
Select the correct answer using the codes given below.

• Only (i) and (iii)
• Both (i) and (ii)
• Both (iii) and (iv)
• Only (ii)
Solution
Correct Option: D  [ Only (ii) ]

Explanation: A zoonosis is an infectious disease that has jumped from a non-human animal to humans.

Lens is made up of:

• pyrex glass
• flint glass
• ordinary glass
• cobalt glass
Solution
Correct Option: B  [ flint glass ]

Explanation:

Muscle fatigue is due to accumulation of

• Carbon Dioxide
• Creatinine
• Lactic acid
• Ethyl alcohol
Solution
Correct Option: C  [ Lactic acid ]

Explanation:

In coriander the useful parts are:

• roots &leaves
• leaves & flowers
• leaves & dried fruits
• flower& dried fruits
Solution
Correct Option: C  [ leaves & dried fruits ]

Explanation:

Malaria is caused by

• parasitic infection
• viral infection
• bacterial infection
• fungal infection
Solution
Correct Option: A  [ parasitic infection ]

Explanation:

An F1 car is mostly made up of which material ?

• Plastic
• Carbon fibre
• Steel
• Aluminium
Solution
Correct Option: B  [ Carbon fibre ]

Explanation: