CODE NO. A 77/080/509
WORKSHOP INSTRUCTOR (MECHANICAL ENGINEERIG)
TECHNICAL EDUCATION DEPARTMENT
1. In the nitriding process of heat treatment, the steel components are heated to about 6500 C.
(A) by an oxy-acetylene flame (B) in an atmosphere of ammonia gas
(C) in an atmosphere of chlorine (D) in a bath having fused sodium cyanide
2. According to Dalton’s law, the total pressure of the mixture of gases is equal to:
(A) greater of the partial pressures of all
(B) average of partial pressures of all
(C) sum of the partial pressures of all
(D) sum of the partial pressures of all divided by average molecular weight.
3. Overfire burning is the phenomenon of:
(A) supply of excess air
(B) supply of excess coal
(C) burning CO and unburnts in upper zone of furnace by supplying more air.
(D) fuel bed firing.
4. A jet engine works on the principle of conservation of:
(A) energy (B) mass
(C) angular momentum (D) linear momentum
5. Which of the following lathe operations require that the cutting edge of a tool bit be placed exactly on the work centre - line ?
(A) boring (B) drilling (C) facing (D) turning
6. Job evaluation is the method of determining the:
(A) relative worth of jobs (B) skills required by a worker.
(C) contribution of a worker (D) contribution of a job.
7. In cooling tower “approach” is the temperature difference between the
(A) hot inlet water and ctild outlet water
(B) hot inlet water and WBT
(C) cold outlet and WBT
(D) DBT and WBT
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