Auto mechanics Paper 2 WASSCE (SC), 2019

Question 2

 

  
(a) (i) Identify the instrument.
(ii) Name the parts labelled J, K, L, M and N.
(iii) State the function of the instrument

(b) Sketch a piston and label three of its parts.

 

 

Observation

 

Candidates’ responses to 2(a) were not adequate. Their responses to 2(b), however, were not satisfactory. The solution to the poorly answered part of the question is given below

 

(d) (i) The Name of the Instrument

Outside or External micrometer, external micrometer gauge or external micrometer screw gauge.

(ii) Names of Labelled Parts

J: Anvil
K: Spindle
L: Locknut, locker or lock
M: Ratchet
N: Barrel or sleeve

(iii) Function of the Instrument

The instrument is used to measure, to precision, the external diameter ofobjects.