AP ECET 2021 Questions
AP ECET 2021 questions have been provided along with their solutions.
1. Which of the following dosage forms does not need sterilization?
- Surgical dusting powder
- IV Injection
- Gels
- Eye drops
Correct Answer: Eye drops
2. An open tank with a square base (with side x) and vertical sides (with height y) is to be constructed from a metal sheet to hold a given quantity of water. The cost of the material will be the least if
Correct Answer: x=2y
3. Which of the following quantities have not been expressed in proper units?
- Electric field = Newton/coulomb
- Surface tension = newton/meter
- Energy = kg m/s
- Pressure = Newton/m2
Correct Answer: Energy = kg m/s
4. The maximum range of a projectile fired with some initial velocity is found to be 1000 m/s, in the absence of wind and air resistance. The maximum height reached by this projectile is
- 250 m
- 500 m
- 1000 m
- 2000 m
Correct Answer: 250 m
5. A body sliding down an inclined plane under its own weight at constant speed. If the inclination of the plane to the horizontal is 30 degrees, the angle of friction is
- 30 degrees
- 60 degrees
- 45 degrees
- 90 degrees
Correct Answer: 30 degrees
6. Which of the following is the disadvantage of electric traction over other systems of traction?
- Corrosion problems in the underground pipework
- Short-time power failure interrupts traffic for hours
- The high capital outlay in fixed installations besides route limitation
- Interference with communication lines
Correct Answer: High capital outlay in fixed installations besides route limitation
7. White lung cancer is caused by
- Asbestos
- Textiles
- Paper
- Silica
Correct Answer: Textiles
8. If the perimeter of a rectangle is 40 units, then the area of that rectangle is maximum when its dimensions are
Correct Answer: 10,10
9. Which of the following is an example of a co-polymer?
- PVC
- Teflon
- Polythene
- Buna-S rubber
Correct Answer: Buna-s rubber
10. A non-dimensional number generally associated with natural convection heat transfer is
- Nusselt number
- Grashoff number
- Prandtl number
- Reynolds number
Correct Answer: Grashoff number
11. If the radius of the sphere is increased from 5cm to 5.03 cm, then the approximate relative error in its surface area is
Correct Answer: 0.012
12. If z is the set of all integers then
- Usual addition is not a binary operation in Z
- Usual subtraction is not a binary operation in Z
- Usual multiplication is not a binary operation in Z
- Usual division is not a binary operation in Z
Correct Answer: Usual division is not a binary operation in Z
