Heat Transfer - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1978

The heat from the sun reaches the earth by the process

A. Insulation
B. Precipitation
C. Conduction
D. Convection
E. Radiation

Question 3:

• JAMB 1979

Two closed vessels contain equal volumes of boiling water and are identical except that one is blackened on the outside while the other is polished. Which of the following is correct?

A. The polished vessel will cool faster because a polished surface is a good radiator
B. The polished vessel will cool faster because it will absorbe less heat from the room
C. The black vessel will cool faster because it is a better conductor of heat
D. The polished vesselwill cool faster because it reflects heat better
E. The black vessel will cool faster because a black surface radiates heat faster than a polished one

Question 4:

• JAMB 1979

What are the units of thermal conductivity?

A. Kg.m.sec²
B. Joule sec^-1m^-1k^-1
C. Kg.m
D. Newton sec^-1m²
E. M³

Question 5:

• JAMB 1979

Consider a thick glass tumbler and a thin glass tumbler which are made of the same kind of glass. Some hot liquid is poured into them. Which of the following statements is correct?

A. The thick tumbler is less likely to crack because it is stronger
B. The thick tumbler is less likely to crack because it insulates the heat beter, glass being a poor conductor of heat
C. Both tumblers are equally likely to crack because they are made of the same kind of glass
D. The thick tumbler is more likely to crack because uneven expansion persists for a longer time within the thicker glass
E. The thick tumbler is more likely to crack because it is heavier