- 40%
- 50%
- 60%
- 70%
- a
-
16/40*100=40%
2021
All Solved Past Papers 2021 are included in this section.All Solved MCQs of 2021 of All Posts, All Departments and All Testing Services are also included in this section.
Simplify : 0.8-0.3+0.5=?
- 1
- 1.6
- 2.0
- 2.3
- a
-
0.8-0.3+0.5=1
The average (Arithmetic Mean) of 5,10,15 and X is 20. What is the value of X?
- 50
- 60
- 70
- 65
- a
An alarm beeps 16 times per minute. How much time will it take to beep 88 times ?
- 5 Minutes
- 5.5 Minutes
- 6.5 Minutes
- 7 Minutes
- b
-
60/16
3.75 sec
88*3.75=330 sec=5.5 Minutes
A car consumes 20 liters of petrol to drive 240 kilometers. How many liters of petrol will be required for a trip of 600 Kilometer?
- 50
- 60
- 45
- 35
- a
-
20 Liters = 240 km
1 Liter=240/20
12 Km
600/12=50
Rusting of Iron involves …….
- Decomposition
- Reduction
- Oxidation
- Displacement
- c
-
Rusting is caused by oxidation in the presence of air, moisture or water.
Atomic Number of Oxygen is …..
- 7
- 8
- 9
- 10
- b
-
Oxygen is represented by “O”.
Oxygen was discovered by Joseph Priestly in 1774.
Microphone converts sound energy into …….
- Heat Energy
- Electrical Signals
- Microwaves
- Optical Signals
- b
Atomic Number of Nitrogen is …….
- 7
- 8
- 9
- 10
- a
-
The symbol of Nitrogen is “N”.
Nitrogen was discovered by Daniel Rutherford.
Glass is made of the mixture of ….?
- Sand & Salt
- Quartz & Mica
- Sand & Silicate
- None of these
- c