Question19:-If the system of equations ‘x + ay = 0°, ‘az + y = 0° and ‘ax+ z = 0° has infinite number of solutions then ‘a
=?

Correct Answer:- Option-C
Question20:-The function *F(x) = x*2 (x*2 - 4(x - 1))* has a local minimum at the point ‘x = 7“
‏ا‎
‎B:--1
‎C:-4
‎D:-2
‎Correct Answer:- Option-D
Question21:-Quick setting cement is produced by adding and by finely grinding the cement.
A:-Gypsum
B:-Aluminium Sulphate
C:-Sodium Sulphate
D:-None of these
Correct Answer:- Option-B
Question22:- aggregates increases the workability of cement concrete.
A:-Angular
B:-Flaky
:-Elongated
D:-Rounded
Correct Answer:- Option-D
Question23:-Which foundation can be adopted in areas where differential settlement of soil is very high?
A:-lsolated footing
B:-Cantilever footing
C:-Raft foundation
D:-Rubble foundation
Correct Answer:- Option-C
Question24:- is a line which joins subsidiary stations on the main line in a chain surveying.
A--Tie line
-Main line
C:-Base line
D:-None of these
Correct Answer:- Option-A
Question25:-The readings taken with a dumpy level to stations A, B and C are 1.200, 0.900 and 1.050 respectively. What is
the reduced level of station C, if the reduced level of bench mark at station A is 100.000m?
A:-100.000m
B:-100.150m
C:-101.050m
D:-100.300m
Correct Answer:- Option-B
Question26:-Gudgeon pin forms the link between
-Piston and big end of connecting rod
:-Piston and small end of connecting rod
C:-Connecting rod and crank
D:-Big end and small end of connecting rod
Correct Answer:- Option-B
Question27:-Piston rings are usually made of
A:-Cast Iron
B:-Aluminium
C:-Phosphor bronze
D:-Carbon steel
Correct Answer:- Option-A
Question28:-Which is not the feature of a petrol engine when compared with a diesel engine?
A:-light construction and low initial cost
B:-greater noise and vibration