Page:8
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Deputy Engineer (Mechanical), Inspector of Factories and Boilers Gr II, Assistant Engineer (Mechanical)' And exam conducted in the year 2023. And Question paper code was '050/2023'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
050/23
41.
42.
43.
44.
45.
46.
47.
48.
The volumetric efficiency of a well-designed SI engine lies in the range
4൧) 40 - 50% B) 51-60% C) 61-70% D) 71-90%
In two-stage reciprocating air compressor, the suction and delivery pressures are
1 and 4 bar respectively. For maximum efficiency, the intercooler pressure is
A) 3 bar B) 2.5 bar C) 2bar D) 1.5 bar
If an axial flow compressor is designed for a constant velocity through all stages,
then the area of annulus of the succeeding stage will
A) remain the same B) progressively decrease
C) progressively increase D) depend upon number of stage
Increasing the number of reheating stages in a gas turbine to infinity makes the
expansion tending
A) isothermal B) isobaric
C) adiabatic D) reversible adiabatic
A refrigerator working on a reversed Carnot cycle has a COP of 4.5. If it works as a
heat pump and consumes 1 kW, the heating effect will be
A) 1 kw B) 4.5 kw 00 ۷ 7) 5.5 01
In aqua ammonia and Li-Br water absorption refrigeration systems, the refrigerants are
A) water and water B) water and Li-Br
C) ammonia and Li-Br D) ammonia and water
During chemical dehumidification process of air
A) dry bulb temperature and specific humidity decrease
B) dry bulb temperature decreases and specific humidity increases
C) dry bulb temperature increases and specific humidity decreases
D) dry bulb temperature and specific humidity increase
An increase in fin effectiveness is caused by high values of
1. convective coefficient
2. thermal conductivity
3. cross sectional area
4. circumference
Identify the correct statement.
A) 1 and3 B) 2and3
C) 3and4 D) 2and4