The clinical thermometer differs from other mercury-in-glass thermometers because it has
I. a constriction
II. a wide range
III. a short range
IV. a narrow bore.
Which of the above are correct?
A
I and II only
B
I and III only
C
III and IV only
D
I,II and III only
E
I, III and IV only
Verified Correct Answer: B.
Physical Principles & Numerical Solution
Correct features of a clinical thermometer (that differ from ordinary mercury-in-glass thermometers):
- I. A constriction — Yes (the kink just above the bulb prevents mercury from falling back on its own after removal from the body).
- III. A short range — Yes (typically 35^\circC to 42^\circC or 43^\circC, suitable only for human body temperature).
Thus, only I and III are correct for what makes the clinical thermometer different.
Source: Myschool Past Questions Archive (Record #42733)