According to the definition of 1 KWh, a 100 watt bulb consumes one unit of electricity in_________?

A. 2 hours
B. 5 hours
C. 8 hours
D. 10 hours

Units of electricity consumed by 2500 watt air-conditioner in one hour are_________?

A. 25 units
B. 2.25 units
C. 2.5 units
D. 0.25 units

In the electricity meter the digit to the extreme right is___________?

A. 1/5th of the unit
B. 1/100 of the unit
C. 1/10th of the unit
D. 1/1000th of the unit

In BTU system, one BTU is equal to__________?

A. 2055 joule
B. 1155 joule
C. 2155 joule
D. 1055 joule

In which system of units, gas bills are charged?

A. Si
B. Cgs
C. Btu
D. Cng

All forms of energy that we use are ultimately transformed into__________?

A. Electrical energy
B. Heat energy
C. Light energy
D. Chemical energy

Sound travels_______ in solid materials then liquid?

A. Constant
B. Slowest
C. Fastest
D. None of these

The chemical name of “Acid” (Tezaab) is___________?

A. Sulfuric acid
B. Sodium chloride
C. Citric acid
D. None of these

During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.

A. Salt
B. Chlorine
C. Carbon dioxide
D. Water

Which of the following mixture of gases is required in gas welding?

A. Oxygen and ethylene
B. Oxygen and hydrogen
C. Acetylene and oxygen
D. Acetylene and hydrogen