WAEC Past Questions and Answers - Page 2831

14,151.

Using venier calipers, which of the following readings gives the correct measurement for the length of a rod?

A.

4.1 cm

B.

4.13cm

C.

125 cm

D.

1254 cm

Correct answer is B

Vernier calipers commonly used in industry provide a precision to 0.01 mm (10 micrometres), or 0.01cm or one thousandth of an inch.

 Usually, it is the total length of the main scale. Vernier calipers, generally, have a range of 300 mm

300 millimeters equal 30.0 centimeters (300mm = 30.0cm).

14,152.

The graph given is for the relation y = 2x2 + x - 1. Find the minimum value of y

A.

0.00

B.

-0.65

C.

-1.25

D.

-2.10

Correct answer is C

No explanation has been provided for this answer.

14,153.

The viscosity of a fluid depends on the following factors except the?

A.

relative motion between the layers of the fluid

B.

nature of the material of the fluid

C.

surface area of the fluid in contact

D.

normal reaction in the fluid

Correct answer is D

The viscosity of a material is affected by temperature, pressure, nature of fluid, velocity gradient

14,154.

The graph given is for the relation y = 2x2 + x - 1.What are the coordinates of the point S?

A.

(1, 0.2)

B.

(1, 0.4)

C.

(1, 2.0)

D.

(1, 40)

Correct answer is C

No explanation has been provided for this answer.

14,155.

Molecules move in random motion within a liquid. The total internal energy of the liquid depends on all of the following except its?

A.

temperature

B.

mass

C.

specific heat capacity

D.

melting point

Correct answer is D

Internal energy is affected by factors such as pressure, volume, and temperature.

All of the variables in this list are state functions. Mass, volume, pressure, temperature, density, and entropy are all examples of state functions.