(A) Distance
(B) Time period
(C) Light intensity
(D) Time
Q. Newton is a unit of:
(A) Mass
(B) Force
(C) Acceleration
(D) None of these
Q. Coulomb is a unit of:
(A) Electric charge
(B) Power
(C) Energy
(D) None of these
Answers:
1. (A) Distance
2. (B) Force
3. (A) Electric charge
(A) Hygrometer
(B) Barometer
(C) Hydrometer
(D) None of these
Q. An instrument used to measure the relative density of liquids is called:
(A) Hydrometer
(B) Hygrometer
(C) Barometer
(D) None of these
Q. An instrument that is used to measure air pressure in a certain environment is:
(A) Hydrometer
(B) Hygrometer
(C) Barometer
(D) None of these
Answers:
1. (D) None of these
2. (A) Hydrometer
3. (C) Barometer
(A) Conduction
(B) Convection
(C) Radiation
(D) Reflection
Q. The transfer of heat internal energy by microscopic collision of particles and movement of electrons within a body is called:
(A) Thermal conduction
(B) Thermal convection
(C) Thermal radiation
(D) None of these
Q. The heat transfer due to bulk movement of molecules within fluids such as gases, liquids or molten rocks is called:
(A) Conduction
(B) Radiation
(C) Reflection
(D) Convection
Answers:
1. (B) Convection
2. (A) Thermal conduction
3. (D) Convection
(A) Steel can be saved.
(B) Accidents due to contraction in winter can be avoided.
(C) Air gaps are necessary for bearing the weight of running train.
(D) Accidents due to expansion in summer can be avoided.
Answer: (D) Accidents due to expansion in summer can be avoided.
Q. In mechanics terms, a chassis or a frame work for carring wheels attached to a vehicle is called:
(A) Bogie
(B) Trolley
(C) Wheelbarrow
(D) None of these
Answer: (A) Bogie
Q. The word “train” comes from the old French trahiner, derived from the Latin trahere meaning:
(A) to drag
(B) to pull
(C) to speedup
(D) None of these
Answer: (B) to pull
(A) Parasite
(B) Scavenger
(C) Predator
(D) Mammal
Answer: (C) Predator
Q. The animals that the predator hunts are called:
(A) Prey
(B) Scavenger
(C) Mammal
(D) None of these
Answer: (A) Prey
Q. A top predator or apex predator is the one who is:
(A) huge in size
(B) not the prey of other predators
(C) rare to find
(D) None of these
Answer: (B) not the prey of other predators