## General Science Questions and Answers Part-9

1. 'Bar' is the unit of
a) Temperature
b) Heat
c) Atmospheric pressure
d) Current

Explanation: The bar (symbol bar) is widely used in many countries as a unit of pressure.

2. One Joule is equal to
a) 105 ergs
b) 103 ergs
c) 107 ergs
d) 1011 ergs

Explanation: One Joule is equal to 107 ergs.

3. Kilowatt is a unit to measure:
a) Work
b) Power
c) Electricity
d) Current

Explanation: The power consumption of small devices is usually measured in Watts, and the power consumption of larger devices is measured in kilowatts (kW), or 1,000 Watts.

4. Electric current is measured by:
a) Commutator
b) Anemometer
c) Ammeter
d) Voltmeter

Explanation: An instrument called ammeter measures electric current in a circuit. It is always connected in series in a circuit through which the current is to be measured. Also ammeter has negligible resistance, thus no voltage gets dropped across it

5. A chronometer measures:
a) Colour contrast
b) Sound waves
c) Time
d) Water waves

Explanation: A chronometer measures time.

6. Which one of the following is the petroleum wax?
a) Paraffin wax
b) Jonoba wax
c) Carnauba wax
d) Bees wax

Explanation: Paraffin wax is obtained from petroleum by dewaxing light lubricating oil stocks. It is used in candles, wax paper, polishes, cosmetics, and electrical insulators. It assists in extracting perfumes from flowers, forms a base for medical ointments, and supplies a waterproof coating for wood. In wood and paper matches, it helps to ignite the matchstick by supplying an easily vaporized hydrocarbon fuel.

7. What cause a moving body to resist a change in its state of motion?
a) Displacement
b) Acceleration
c) Inertia
d) Velocity

Explanation: Inertia: tendency of an object to resist changes in its velocity. An object at rest has zero velocity - and (in the absence of an unbalanced force) will remain with a zero velocity. Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force

8. BACK TO VILLAGES slogan was given by:
a) Lenin
b) Mao
c) Nehru
d) Patel

Explanation: BACK TO VILLAGES slogan was given by Mao.

9. AIDS is caused by:
a) Bacteria
b) Fungus
c) Helminth
d) Virus